feat: 虚拟媒体支持同时挂载多个镜像

2026-07-29 14:51:44 +08:00 · 2026-07-12 11:40:01 +08:00
parent c9ae9dd893
commit 7c9166a8cf
24 changed files with 1513 additions and 1036 deletions
--- a/src/events/mod.rs
+++ b/src/events/mod.rs
@@ -6,7 +6,7 @@ use self::types::EXACT_EVENT_TOPICS;

 pub use types::{
    AtxDeviceInfo, AudioDeviceInfo, ClientStats, HidDeviceInfo, LedState, MsdDeviceInfo,
-    StreamDeviceLostKind, SystemEvent, TtydDeviceInfo, VideoDeviceInfo,
+    MsdDeviceMediaInfo, StreamDeviceLostKind, SystemEvent, TtydDeviceInfo, VideoDeviceInfo,
 };

 use tokio::sync::broadcast;
--- a/src/events/types.rs
+++ b/src/events/types.rs
@@ -42,12 +42,24 @@ pub struct HidDeviceInfo {
 #[derive(Debug, Clone, Serialize, Deserialize)]
 pub struct MsdDeviceInfo {
    pub available: bool,
-    pub mode: String,
-    pub connected: bool,
-    pub image_id: Option<String>,
+    pub disk_mode: String,
+    pub slot_capacity: u8,
+    pub mounted_count: u8,
+    pub mounted_media: Vec<MsdDeviceMediaInfo>,
+    pub usb_reenumerating: bool,
    pub error: Option<String>,
 }

+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct MsdDeviceMediaInfo {
+    pub id: String,
+    pub kind: String,
+    pub name: String,
+    pub cdrom: bool,
+    pub read_only: bool,
+    pub size: u64,
+}
+
 #[derive(Debug, Clone, Serialize, Deserialize)]
 pub struct AtxDeviceInfo {
    pub available: bool,
--- a/src/hid/backend.rs
+++ b/src/hid/backend.rs
@@ -83,6 +83,10 @@ pub trait HidBackend: Send + Sync {

    async fn reset(&self) -> Result<()>;

+    async fn prepare_rebuild(&self) -> Result<()> {
+        self.shutdown().await
+    }
+
    async fn shutdown(&self) -> Result<()>;

    fn runtime_snapshot(&self) -> HidBackendRuntimeSnapshot;
--- a/src/hid/mod.rs
+++ b/src/hid/mod.rs
@@ -234,6 +234,30 @@ impl HidController {
        Ok(())
    }

+    pub async fn prepare_otg_rebuild(&self) -> Result<()> {
+        if !matches!(*self.backend_type.read().await, HidBackendType::Otg) {
+            return Ok(());
+        }
+
+        info!("Preparing OTG HID backend for gadget rebuild");
+        self.backend_available.store(false, Ordering::Release);
+        self.stop_runtime_worker().await;
+
+        if let Some(backend) = self.backend.write().await.take() {
+            backend.prepare_rebuild().await?;
+        }
+
+        let current = self.runtime_state.read().await.clone();
+        let rebuilding_state = HidRuntimeState::with_error(
+            &HidBackendType::Otg,
+            &current,
+            "OTG gadget is rebuilding",
+            "rebuilding",
+        );
+        self.apply_runtime_state(rebuilding_state).await;
+        Ok(())
+    }
+
    pub async fn send_keyboard(&self, event: KeyboardEvent) -> Result<()> {
        if !self.backend_available.load(Ordering::Acquire) {
            return Err(AppError::BadRequest(
--- a/src/hid/otg.rs
+++ b/src/hid/otg.rs
@@ -894,6 +894,19 @@ impl HidBackend for OtgBackend {
        Ok(())
    }

+    async fn prepare_rebuild(&self) -> Result<()> {
+        self.stop_runtime_worker();
+        *self.keyboard_dev.lock() = None;
+        *self.mouse_rel_dev.lock() = None;
+        *self.mouse_abs_dev.lock() = None;
+        *self.consumer_dev.lock() = None;
+        self.initialized.store(false, Ordering::Relaxed);
+        self.online.store(false, Ordering::Relaxed);
+        self.notify_runtime_changed();
+        info!("OTG backend prepared for gadget rebuild");
+        Ok(())
+    }
+
    async fn shutdown(&self) -> Result<()> {
        self.stop_runtime_worker();

@@ -948,6 +961,7 @@ impl Drop for OtgBackend {
 #[cfg(test)]
 mod tests {
    use super::*;
+    use std::io::{Seek, SeekFrom, Write};

    #[test]
    fn test_led_state() {
@@ -964,4 +978,22 @@ mod tests {
        let kb_report = KeyboardReport::default();
        assert_eq!(kb_report.to_bytes().len(), 8);
    }
+
+    #[tokio::test]
+    async fn prepare_rebuild_closes_devices_without_writing_reset_reports() {
+        let mut file = tempfile::tempfile().unwrap();
+        file.write_all(b"sentinel").unwrap();
+        file.seek(SeekFrom::Start(0)).unwrap();
+
+        let backend = OtgBackend::from_handles(HidDevicePaths::default()).unwrap();
+        *backend.keyboard_dev.lock() = Some(file);
+        backend.initialized.store(true, Ordering::Relaxed);
+        backend.online.store(true, Ordering::Relaxed);
+
+        backend.prepare_rebuild().await.unwrap();
+
+        assert!(backend.keyboard_dev.lock().is_none());
+        assert!(!backend.initialized.load(Ordering::Relaxed));
+        assert!(!backend.online.load(Ordering::Relaxed));
+    }
 }
--- a/src/msd/controller.rs
+++ b/src/msd/controller.rs
@@ -7,7 +7,10 @@ use tracing::{debug, info, warn};

 use super::image::ImageManager;
 use super::monitor::MsdHealthMonitor;
-use super::types::{DownloadProgress, DownloadStatus, DriveInfo, ImageInfo, MsdMode, MsdState};
+use super::types::{
+    DiskMode, DownloadProgress, DownloadStatus, DriveInfo, ImageInfo, MountedMedia,
+    MountedMediaKind, MsdState,
+};
 use crate::error::{AppError, Result};
 use crate::otg::{MsdFunction, MsdLunConfig, OtgService};

@@ -62,17 +65,23 @@ impl MsdController {
        *self.msd_function.write().await = Some(msd_func);

        let mut state = self.state.write().await;
+        state.disk_mode = if self.otg_service.msd_lun_capacity().await == 1 {
+            DiskMode::Single
+        } else {
+            DiskMode::Multi
+        };
        state.available = true;

        if self.drive_path.exists() {
            if let Ok(metadata) = std::fs::metadata(&self.drive_path) {
-                state.drive_info = Some(DriveInfo {
+                let drive_info = DriveInfo {
                    size: metadata.len(),
                    used: 0,
                    free: metadata.len(),
                    initialized: true,
                    path: self.drive_path.clone(),
-                });
+                };
+                state.drive_info = Some(drive_info.clone());
                debug!(
                    "Found existing virtual drive: {}",
                    self.drive_path.display()
@@ -104,20 +113,12 @@ impl MsdController {
        }
    }

-    pub async fn is_available(&self) -> bool {
-        self.state.read().await.available
-    }
-
-    pub async fn connect_image(
-        &self,
-        image: &ImageInfo,
-        cdrom: bool,
-        read_only: bool,
-    ) -> Result<()> {
+    pub async fn mount_image(&self, image: &ImageInfo, cdrom: bool, read_only: bool) -> Result<()> {
        let _op_guard = self.operation_lock.write().await;
        let mut state = self.state.write().await;
+        let previous_state = state.clone();

-        self.assert_can_connect(&state).await?;
+        self.assert_available(&state).await?;

        if !image.path.exists() {
            let error_msg = format!("Image file not found: {}", image.path.display());
@@ -127,20 +128,30 @@ impl MsdController {
            return Err(AppError::Internal(error_msg));
        }

-        let config = if cdrom {
-            MsdLunConfig::cdrom(image.path.clone())
-        } else {
-            MsdLunConfig::disk(image.path.clone(), read_only)
-        };
-        self.configure_lun_now(&config).await?;
+        if state
+            .mounted_media
+            .iter()
+            .any(|media| media.kind == MountedMediaKind::Image && media.id == image.id)
+        {
+            return Err(AppError::BadRequest("Image is already mounted".to_string()));
+        }

-        state.connected = true;
-        state.mode = MsdMode::Image;
-        state.current_image = Some(image.clone());
+        let lun = Self::lowest_free_lun(&state)
+            .ok_or_else(|| AppError::BadRequest("Media slots are full".to_string()))?;
+
+        let media = MountedMedia::image(lun, image, cdrom, read_only);
+        if let Err(e) = self.configure_media(&media).await {
+            *state = previous_state;
+            return Err(e);
+        }
+        state.mounted_media.push(media);

        info!(
-            "Connected image: {} (cdrom={}, ro={})",
-            image.name, cdrom, read_only
+            "Mounted image: {} on LUN {} (cdrom={}, ro={})",
+            image.name,
+            lun,
+            cdrom,
+            cdrom || read_only
        );

        drop(state);
@@ -150,11 +161,12 @@ impl MsdController {
        Ok(())
    }

-    pub async fn connect_drive(&self) -> Result<()> {
+    pub async fn mount_drive(&self) -> Result<()> {
        let _op_guard = self.operation_lock.write().await;
        let mut state = self.state.write().await;
+        let previous_state = state.clone();

-        self.assert_can_connect(&state).await?;
+        self.assert_available(&state).await?;

        if !self.drive_path.exists() {
            let err =
@@ -165,14 +177,48 @@ impl MsdController {
            return Err(err);
        }

-        let config = MsdLunConfig::disk(self.drive_path.clone(), false);
-        self.configure_lun_now(&config).await?;
+        let drive_info = state.drive_info.clone().or_else(|| {
+            std::fs::metadata(&self.drive_path)
+                .ok()
+                .map(|metadata| DriveInfo {
+                    size: metadata.len(),
+                    used: 0,
+                    free: metadata.len(),
+                    initialized: true,
+                    path: self.drive_path.clone(),
+                })
+        });
+        if state.drive_info.is_none() {
+            state.drive_info = drive_info.clone();
+        }

-        state.connected = true;
-        state.mode = MsdMode::Drive;
-        state.current_image = None;
+        if state
+            .mounted_media
+            .iter()
+            .any(|media| media.kind == MountedMediaKind::Drive)
+        {
+            return Err(AppError::BadRequest(
+                "Virtual drive is already mounted".to_string(),
+            ));
+        }

-        info!("Connected virtual drive: {}", self.drive_path.display());
+        let drive_info = drive_info
+            .ok_or_else(|| AppError::Internal("Virtual drive info is unavailable".to_string()))?;
+        let lun = Self::lowest_free_lun(&state)
+            .ok_or_else(|| AppError::BadRequest("Media slots are full".to_string()))?;
+
+        let media = MountedMedia::drive(lun, &drive_info);
+        if let Err(e) = self.configure_media(&media).await {
+            *state = previous_state;
+            return Err(e);
+        }
+        state.mounted_media.push(media);
+
+        info!(
+            "Mounted virtual drive on LUN {}: {}",
+            lun,
+            self.drive_path.display()
+        );

        drop(state);
        drop(_op_guard);
@@ -181,22 +227,138 @@ impl MsdController {
        Ok(())
    }

-    async fn assert_can_connect(&self, state: &MsdState) -> Result<()> {
+    async fn assert_available(&self, state: &MsdState) -> Result<()> {
        if !state.available {
            self.monitor
                .report_error("MSD not available", "not_available")
                .await;
            return Err(AppError::Internal("MSD not available".to_string()));
        }
-        if state.connected {
-            return Err(AppError::Internal(
-                "Already connected. Disconnect first.".to_string(),
-            ));
-        }
        Ok(())
    }

-    async fn configure_lun_now(&self, config: &MsdLunConfig) -> Result<()> {
+    fn media_config(media: &MountedMedia) -> MsdLunConfig {
+        if media.cdrom {
+            MsdLunConfig::cdrom(media.path.clone())
+        } else {
+            MsdLunConfig::disk(media.path.clone(), media.read_only)
+        }
+    }
+
+    fn lowest_free_lun(state: &MsdState) -> Option<u8> {
+        (0..state.disk_mode.capacity())
+            .find(|lun| !state.mounted_media.iter().any(|media| media.lun == *lun))
+    }
+
+    fn reset_mounts_for_mode(state: &mut MsdState, disk_mode: DiskMode) {
+        state.disk_mode = disk_mode;
+        state.mounted_media.clear();
+    }
+
+    pub async fn set_disk_mode(&self, disk_mode: DiskMode) -> Result<bool> {
+        let _op_guard = self.operation_lock.write().await;
+        let previous_state = {
+            let mut state = self.state.write().await;
+            self.assert_available(&state).await?;
+            if state.disk_mode == disk_mode {
+                return Ok(false);
+            }
+            let previous_state = state.clone();
+            state.usb_reenumerating = true;
+            previous_state
+        };
+        self.mark_device_info_dirty().await;
+
+        let switch_result = async {
+            self.otg_service
+                .set_msd_lun_capacity(disk_mode.capacity())
+                .await?;
+            self.otg_service.msd_function().await.ok_or_else(|| {
+                AppError::Internal("MSD function missing after OTG rebuild".to_string())
+            })
+        }
+        .await;
+
+        let msd_function = match switch_result {
+            Ok(msd_function) => msd_function,
+            Err(switch_error) => {
+                if let Err(rollback_error) = self.rollback_mode_switch(&previous_state).await {
+                    let mut state = self.state.write().await;
+                    state.available = false;
+                    state.mounted_media.clear();
+                    state.usb_reenumerating = false;
+                    *self.msd_function.write().await = None;
+                    let error_msg = format!(
+                        "Failed to switch MSD disk mode: {switch_error}; rollback failed: {rollback_error}"
+                    );
+                    self.monitor
+                        .report_error(&error_msg, "disk_mode_rollback_failed")
+                        .await;
+                    self.mark_device_info_dirty().await;
+                    return Err(AppError::Internal(error_msg));
+                }
+
+                let mut state = self.state.write().await;
+                *state = previous_state;
+                state.usb_reenumerating = false;
+                let error_msg = format!("Failed to switch MSD disk mode: {switch_error}");
+                self.monitor
+                    .report_error(&error_msg, "disk_mode_switch_failed")
+                    .await;
+                self.mark_device_info_dirty().await;
+                return Err(AppError::Internal(error_msg));
+            }
+        };
+        *self.msd_function.write().await = Some(msd_function);
+
+        let mut state = self.state.write().await;
+        Self::reset_mounts_for_mode(&mut state, disk_mode);
+        state.usb_reenumerating = false;
+        info!("Switched MSD disk mode to {:?}", disk_mode);
+
+        drop(state);
+        drop(_op_guard);
+
+        self.mark_device_info_dirty().await;
+        Ok(true)
+    }
+
+    pub async fn unmount_image(&self, image_id: &str) -> Result<()> {
+        self.unmount_media(|media| media.kind == MountedMediaKind::Image && media.id == image_id)
+            .await
+    }
+
+    pub async fn unmount_drive(&self) -> Result<()> {
+        self.unmount_media(|media| media.kind == MountedMediaKind::Drive)
+            .await
+    }
+
+    async fn unmount_media<F>(&self, predicate: F) -> Result<()>
+    where
+        F: Fn(&MountedMedia) -> bool,
+    {
+        let _op_guard = self.operation_lock.write().await;
+
+        let mut state = self.state.write().await;
+        let Some(index) = state.mounted_media.iter().position(predicate) else {
+            debug!("Requested media was not mounted, skipping unmount");
+            return Ok(());
+        };
+        let media = state.mounted_media[index].clone();
+
+        self.disconnect_lun(media.lun).await?;
+        state.mounted_media.remove(index);
+        info!("Unmounted media");
+
+        drop(state);
+        drop(_op_guard);
+
+        self.mark_device_info_dirty().await;
+
+        Ok(())
+    }
+
+    async fn configure_media(&self, media: &MountedMedia) -> Result<()> {
        let gadget_path = self.active_gadget_path().await?;
        let msd_hold = self.msd_function.read().await;
        let Some(ref msd) = *msd_hold else {
@@ -207,8 +369,11 @@ impl MsdController {
                "MSD function not initialized".to_string(),
            ));
        };
-        if let Err(e) = msd.configure_lun_async(&gadget_path, 0, config).await {
-            let error_msg = format!("Failed to configure LUN: {}", e);
+        if let Err(e) = msd
+            .configure_lun_async(&gadget_path, media.lun, &Self::media_config(media))
+            .await
+        {
+            let error_msg = format!("Failed to configure LUN {}: {}", media.lun, e);
            self.monitor
                .report_error(&error_msg, "configfs_error")
                .await;
@@ -217,6 +382,29 @@ impl MsdController {
        Ok(())
    }

+    async fn disconnect_lun(&self, lun: u8) -> Result<()> {
+        let gadget_path = self.active_gadget_path().await?;
+        let msd_hold = self.msd_function.read().await;
+        let msd = msd_hold
+            .as_ref()
+            .ok_or_else(|| AppError::Internal("MSD function not initialized".to_string()))?;
+        msd.disconnect_lun_async(&gadget_path, lun).await
+    }
+
+    async fn rollback_mode_switch(&self, previous_state: &MsdState) -> Result<()> {
+        self.otg_service
+            .set_msd_lun_capacity(previous_state.disk_mode.capacity())
+            .await?;
+        let msd_function = self.otg_service.msd_function().await.ok_or_else(|| {
+            AppError::Internal("MSD function missing after OTG rollback".to_string())
+        })?;
+        *self.msd_function.write().await = Some(msd_function);
+        for media in &previous_state.mounted_media {
+            self.configure_media(media).await?;
+        }
+        Ok(())
+    }
+
    async fn finish_connect_success(&self) {
        if self.monitor.is_error().await {
            self.monitor.report_recovered().await;
@@ -228,22 +416,31 @@ impl MsdController {
        let _op_guard = self.operation_lock.write().await;

        let mut state = self.state.write().await;
-
-        if !state.connected {
-            debug!("Nothing connected, skipping disconnect");
+        if state.mounted_media.is_empty() {
+            debug!("Nothing mounted, skipping disconnect");
            return Ok(());
        }

-        let gadget_path = self.active_gadget_path().await?;
-        if let Some(ref msd) = *self.msd_function.read().await {
-            msd.disconnect_lun_async(&gadget_path, 0).await?;
+        let mounted_media = state.mounted_media.clone();
+        let mut disconnected = Vec::new();
+        for media in &mounted_media {
+            if let Err(error) = self.disconnect_lun(media.lun).await {
+                for prior in &disconnected {
+                    if let Err(restore_error) = self.configure_media(prior).await {
+                        state.available = false;
+                        return Err(AppError::Internal(format!(
+                            "Failed to disconnect LUN {}: {error}; restore failed: {restore_error}",
+                            media.lun
+                        )));
+                    }
+                }
+                return Err(error);
+            }
+            disconnected.push(media.clone());
        }

-        state.connected = false;
-        state.mode = MsdMode::None;
-        state.current_image = None;
-
-        info!("Disconnected storage");
+        state.mounted_media.clear();
+        info!("Disconnected all mounted media");

        drop(state);
        drop(_op_guard);
@@ -253,29 +450,29 @@ impl MsdController {
        Ok(())
    }

-    pub fn images_path(&self) -> &PathBuf {
-        &self.images_path
+    pub async fn is_drive_connected(&self) -> bool {
+        self.state
+            .read()
+            .await
+            .mounted_media
+            .iter()
+            .any(|media| media.kind == MountedMediaKind::Drive)
    }

-    pub fn ventoy_dir(&self) -> &PathBuf {
-        &self.ventoy_dir
-    }
+    pub async fn delete_image(&self, image_id: &str) -> Result<()> {
+        let _op_guard = self.operation_lock.write().await;
+        let state = self.state.read().await;
+        if state
+            .mounted_media
+            .iter()
+            .any(|media| media.kind == MountedMediaKind::Image && media.id == image_id)
+        {
+            return Err(AppError::BadRequest(
+                "Cannot delete image while it is mounted".to_string(),
+            ));
+        }

-    pub fn drive_path(&self) -> &PathBuf {
-        &self.drive_path
-    }
-
-    pub async fn is_connected(&self) -> bool {
-        self.state.read().await.connected
-    }
-
-    pub async fn mode(&self) -> MsdMode {
-        self.state.read().await.mode.clone()
-    }
-
-    pub async fn update_drive_info(&self, info: DriveInfo) {
-        let mut state = self.state.write().await;
-        state.drive_info = Some(info);
+        ImageManager::new(self.images_path.clone()).delete(image_id)
    }

    pub async fn download_image(
@@ -423,6 +620,8 @@ impl MsdController {

        let mut state = self.state.write().await;
        state.available = false;
+        state.mounted_media.clear();
+        state.usb_reenumerating = false;

        info!("MSD controller shutdown complete");
        Ok(())
@@ -436,6 +635,7 @@ impl MsdController {
 #[cfg(test)]
 mod tests {
    use super::*;
+    use crate::msd::MULTI_DISK_MSD_LUNS;
    use tempfile::TempDir;

    #[tokio::test]
@@ -462,7 +662,205 @@ mod tests {

        let state = controller.state().await;
        assert!(!state.available);
-        assert!(!state.connected);
-        assert_eq!(state.mode, MsdMode::None);
+        assert_eq!(state.disk_mode, DiskMode::Single);
+        assert!(state.mounted_media.is_empty());
+    }
+
+    #[test]
+    fn single_disk_mode_only_exposes_lun_zero() {
+        let mut state = MsdState::default();
+        MsdController::reset_mounts_for_mode(&mut state, DiskMode::Single);
+        assert_eq!(state.disk_mode.capacity(), 1);
+        assert_eq!(MsdController::lowest_free_lun(&state), Some(0));
+
+        let temp_dir = TempDir::new().unwrap();
+        let image_path = temp_dir.path().join("test.iso");
+        std::fs::write(&image_path, b"iso").unwrap();
+        let image = ImageInfo::new("test".into(), "test.iso".into(), image_path, 3);
+        state
+            .mounted_media
+            .push(MountedMedia::image(0, &image, true, false));
+
+        assert_eq!(MsdController::lowest_free_lun(&state), None);
+        let config = MsdController::media_config(&state.mounted_media[0]);
+        assert!(config.cdrom);
+        assert!(config.ro);
+    }
+
+    #[test]
+    fn multi_disk_mode_allocates_lowest_free_lun() {
+        let temp_dir = TempDir::new().unwrap();
+        let mut state = MsdState::default();
+        MsdController::reset_mounts_for_mode(&mut state, DiskMode::Multi);
+
+        for lun in [0, 1, 3] {
+            let image_path = temp_dir.path().join(format!("test{lun}.img"));
+            std::fs::write(&image_path, b"img").unwrap();
+            let image = ImageInfo::new(
+                format!("test{lun}"),
+                format!("test{lun}.img"),
+                image_path,
+                3,
+            );
+            state
+                .mounted_media
+                .push(MountedMedia::image(lun, &image, false, false));
+        }
+
+        assert_eq!(MsdController::lowest_free_lun(&state), Some(2));
+    }
+
+    #[test]
+    fn multi_disk_mode_supports_eight_images_and_rejects_ninth_slot() {
+        let temp_dir = TempDir::new().unwrap();
+        let mut state = MsdState::default();
+        MsdController::reset_mounts_for_mode(&mut state, DiskMode::Multi);
+
+        for lun in 0..MULTI_DISK_MSD_LUNS {
+            let image_path = temp_dir.path().join(format!("test{lun}.img"));
+            std::fs::write(&image_path, b"img").unwrap();
+            let image = ImageInfo::new(
+                format!("test{lun}"),
+                format!("test{lun}.img"),
+                image_path,
+                3,
+            );
+            let next_lun = MsdController::lowest_free_lun(&state).unwrap();
+            assert_eq!(next_lun, lun);
+            state
+                .mounted_media
+                .push(MountedMedia::image(next_lun, &image, false, false));
+        }
+
+        assert_eq!(state.mounted_media.len(), 8);
+        assert_eq!(MsdController::lowest_free_lun(&state), None);
+    }
+
+    #[test]
+    fn multi_disk_mode_supports_drive_plus_seven_images() {
+        let temp_dir = TempDir::new().unwrap();
+        let drive_path = temp_dir.path().join("ventoy.img");
+        std::fs::write(&drive_path, b"drive").unwrap();
+        let drive = DriveInfo {
+            size: 5,
+            used: 0,
+            free: 5,
+            initialized: true,
+            path: drive_path,
+        };
+        let mut state = MsdState::default();
+        MsdController::reset_mounts_for_mode(&mut state, DiskMode::Multi);
+        state.mounted_media.push(MountedMedia::drive(0, &drive));
+
+        for lun in 1..MULTI_DISK_MSD_LUNS {
+            let image_path = temp_dir.path().join(format!("test{lun}.img"));
+            std::fs::write(&image_path, b"img").unwrap();
+            let image = ImageInfo::new(
+                format!("test{lun}"),
+                format!("test{lun}.img"),
+                image_path,
+                3,
+            );
+            state
+                .mounted_media
+                .push(MountedMedia::image(lun, &image, false, false));
+        }
+
+        assert_eq!(state.mounted_media.len(), 8);
+        assert_eq!(MsdController::lowest_free_lun(&state), None);
+        assert!(state
+            .mounted_media
+            .iter()
+            .any(|media| media.kind == MountedMediaKind::Drive));
+    }
+
+    #[test]
+    fn mode_switch_clears_mount_state() {
+        let temp_dir = TempDir::new().unwrap();
+        let image_path = temp_dir.path().join("test.img");
+        std::fs::write(&image_path, b"img").unwrap();
+        let image = ImageInfo::new("test".into(), "test.img".into(), image_path, 3);
+        let mut state = MsdState::default();
+        MsdController::reset_mounts_for_mode(&mut state, DiskMode::Multi);
+        state
+            .mounted_media
+            .push(MountedMedia::image(0, &image, false, false));
+
+        MsdController::reset_mounts_for_mode(&mut state, DiskMode::Single);
+
+        assert_eq!(state.disk_mode, DiskMode::Single);
+        assert_eq!(state.disk_mode.capacity(), 1);
+        assert!(state.mounted_media.is_empty());
+    }
+
+    #[test]
+    fn duplicate_image_and_drive_detection_use_media_identity() {
+        let temp_dir = TempDir::new().unwrap();
+        let image_path = temp_dir.path().join("test.img");
+        std::fs::write(&image_path, b"img").unwrap();
+        let image = ImageInfo::new("test".into(), "test.img".into(), image_path, 3);
+        let drive = DriveInfo {
+            size: 5,
+            used: 0,
+            free: 5,
+            initialized: true,
+            path: temp_dir.path().join("ventoy.img"),
+        };
+        let mut state = MsdState::default();
+        state
+            .mounted_media
+            .push(MountedMedia::image(0, &image, false, false));
+        state.mounted_media.push(MountedMedia::drive(1, &drive));
+
+        assert!(state
+            .mounted_media
+            .iter()
+            .any(|media| media.kind == MountedMediaKind::Image && media.id == "test"));
+        assert!(state
+            .mounted_media
+            .iter()
+            .any(|media| media.kind == MountedMediaKind::Drive));
+    }
+
+    #[tokio::test]
+    async fn delete_image_is_serialized_with_mount_operations() {
+        let temp_dir = TempDir::new().unwrap();
+        let otg_service = Arc::new(OtgService::new());
+        let controller = MsdController::new(otg_service, temp_dir.path());
+        std::fs::create_dir_all(&controller.images_path).unwrap();
+        let image_path = controller.images_path.join("test.img");
+        std::fs::write(&image_path, b"img").unwrap();
+        let image = ImageManager::new(controller.images_path.clone())
+            .get_by_name("test.img")
+            .unwrap();
+
+        controller
+            .state
+            .write()
+            .await
+            .mounted_media
+            .push(MountedMedia::image(0, &image, false, false));
+        assert!(controller.delete_image(&image.id).await.is_err());
+        assert!(image_path.exists());
+
+        controller.state.write().await.mounted_media.clear();
+        controller.delete_image(&image.id).await.unwrap();
+        assert!(!image_path.exists());
+    }
+
+    #[test]
+    fn slot_configs_force_cdrom_read_only() {
+        let temp_dir = TempDir::new().unwrap();
+        let image_path = temp_dir.path().join("test.iso");
+        std::fs::write(&image_path, b"iso").unwrap();
+        let image = ImageInfo::new("test".into(), "test.iso".into(), image_path, 3);
+        let mut state = MsdState::default();
+        state
+            .mounted_media
+            .push(MountedMedia::image(0, &image, true, false));
+
+        let config = MsdController::media_config(&state.mounted_media[0]);
+        assert!(config.cdrom);
+        assert!(config.ro);
    }
 }
--- a/src/msd/image.rs
+++ b/src/msd/image.rs
@@ -393,10 +393,6 @@ impl ImageManager {

        self.get_by_name(&final_filename)
    }
-
-    pub fn images_path(&self) -> &PathBuf {
-        &self.images_path
-    }
 }

 fn stable_image_id_from_filename(name: &str) -> String {
--- a/src/msd/mod.rs
+++ b/src/msd/mod.rs
@@ -8,8 +8,9 @@ pub use controller::MsdController;
 pub use image::ImageManager;
 pub use monitor::MsdHealthMonitor;
 pub use types::{
-    DownloadProgress, DownloadStatus, DriveFile, DriveInfo, DriveInitRequest, ImageDownloadRequest,
-    ImageInfo, MsdConnectRequest, MsdMode, MsdState,
+    DiskMode, DiskModeRequest, DownloadProgress, DownloadStatus, DriveFile, DriveInfo,
+    DriveInitRequest, ImageDownloadRequest, ImageInfo, ImageMountRequest, MountedMedia,
+    MountedMediaKind, MsdState, MsdStateResponse, MULTI_DISK_MSD_LUNS, SINGLE_DISK_MSD_LUNS,
 };
 pub use ventoy_drive::{VentoyDrive, MIN_DRIVE_SIZE_MB};

--- a/src/msd/types.rs
+++ b/src/msd/types.rs
@@ -2,13 +2,12 @@ use serde::{Deserialize, Serialize};
 use std::path::PathBuf;
 use time::OffsetDateTime;

-#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize, Default)]
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Serialize, Deserialize, Default)]
 #[serde(rename_all = "snake_case")]
-pub enum MsdMode {
+pub enum DiskMode {
    #[default]
-    None,
-    Image,
-    Drive,
+    Single,
+    Multi,
 }

 #[derive(Debug, Clone, Serialize, Deserialize)]
@@ -50,23 +49,109 @@ impl ImageInfo {
    }
 }

-#[derive(Debug, Clone, Serialize, Deserialize)]
+#[derive(Debug, Clone)]
 pub struct MsdState {
    pub available: bool,
-    pub mode: MsdMode,
-    pub connected: bool,
-    pub current_image: Option<ImageInfo>,
+    pub disk_mode: DiskMode,
+    pub mounted_media: Vec<MountedMedia>,
    pub drive_info: Option<DriveInfo>,
+    pub usb_reenumerating: bool,
 }

 impl Default for MsdState {
    fn default() -> Self {
        Self {
            available: false,
-            mode: MsdMode::None,
-            connected: false,
-            current_image: None,
+            disk_mode: DiskMode::Single,
+            mounted_media: Vec::new(),
            drive_info: None,
+            usb_reenumerating: false,
+        }
+    }
+}
+
+#[derive(Debug, Clone, Serialize)]
+pub struct MsdStateResponse {
+    pub available: bool,
+    pub disk_mode: DiskMode,
+    pub slot_capacity: u8,
+    pub mounted_count: u8,
+    pub mounted_media: Vec<MountedMedia>,
+    pub drive_info: Option<DriveInfo>,
+    pub usb_reenumerating: bool,
+}
+
+impl From<&MsdState> for MsdStateResponse {
+    fn from(state: &MsdState) -> Self {
+        Self {
+            available: state.available,
+            disk_mode: state.disk_mode,
+            slot_capacity: state.disk_mode.capacity(),
+            mounted_count: state.mounted_media.len() as u8,
+            mounted_media: state.mounted_media.clone(),
+            drive_info: state.drive_info.clone(),
+            usb_reenumerating: state.usb_reenumerating,
+        }
+    }
+}
+
+pub const SINGLE_DISK_MSD_LUNS: u8 = 1;
+pub const MULTI_DISK_MSD_LUNS: u8 = 8;
+
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Serialize, Deserialize)]
+#[serde(rename_all = "snake_case")]
+pub enum MountedMediaKind {
+    Drive,
+    Image,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct MountedMedia {
+    pub id: String,
+    pub kind: MountedMediaKind,
+    pub name: String,
+    pub cdrom: bool,
+    pub read_only: bool,
+    pub size: u64,
+    #[serde(skip)]
+    pub lun: u8,
+    #[serde(skip)]
+    pub path: PathBuf,
+}
+
+impl MountedMedia {
+    pub fn image(lun: u8, image: &ImageInfo, cdrom: bool, read_only: bool) -> Self {
+        Self {
+            id: image.id.clone(),
+            lun,
+            kind: MountedMediaKind::Image,
+            name: image.name.clone(),
+            cdrom,
+            read_only: cdrom || read_only,
+            size: image.size,
+            path: image.path.clone(),
+        }
+    }
+
+    pub fn drive(lun: u8, info: &DriveInfo) -> Self {
+        Self {
+            id: "drive".to_string(),
+            lun,
+            kind: MountedMediaKind::Drive,
+            name: "Virtual USB".to_string(),
+            cdrom: false,
+            read_only: false,
+            size: info.size,
+            path: info.path.clone(),
+        }
+    }
+}
+
+impl DiskMode {
+    pub fn capacity(self) -> u8 {
+        match self {
+            DiskMode::Single => SINGLE_DISK_MSD_LUNS,
+            DiskMode::Multi => MULTI_DISK_MSD_LUNS,
        }
    }
 }
@@ -104,13 +189,16 @@ pub struct DriveFile {
 }

 #[derive(Debug, Clone, Deserialize)]
-pub struct MsdConnectRequest {
-    pub mode: MsdMode,
-    pub image_id: Option<String>,
+pub struct DiskModeRequest {
+    pub disk_mode: DiskMode,
+}
+
+#[derive(Debug, Clone, Deserialize)]
+pub struct ImageMountRequest {
    #[serde(default)]
-    pub cdrom: Option<bool>,
+    pub cdrom: bool,
    #[serde(default)]
-    pub read_only: Option<bool>,
+    pub read_only: bool,
 }

 #[derive(Debug, Clone, Deserialize)]
@@ -164,4 +252,19 @@ mod tests {
        );
        assert!(info.size_display().contains("GB"));
    }
+
+    #[test]
+    fn default_state_serializes_single_disk_mode() {
+        assert_eq!(DiskMode::default(), DiskMode::Single);
+
+        let state = MsdState::default();
+        assert_eq!(state.disk_mode, DiskMode::Single);
+
+        let json = serde_json::to_value(MsdStateResponse::from(&state)).unwrap();
+        assert_eq!(json["disk_mode"], "single");
+        assert_eq!(json["slot_capacity"], 1);
+        assert!(json.get("mode").is_none());
+        assert!(json.get("current_image").is_none());
+        assert!(json.get("slots").is_none());
+    }
 }
--- a/src/otg/manager.rs
+++ b/src/otg/manager.rs
@@ -135,8 +135,8 @@ impl OtgGadgetManager {
        Ok(device_path)
    }

-    pub fn add_msd(&mut self) -> Result<MsdFunction> {
-        let func = MsdFunction::new(self.msd_instance);
+    pub fn add_msd(&mut self, lun_capacity: u8) -> Result<MsdFunction> {
+        let func = MsdFunction::new(self.msd_instance, lun_capacity)?;
        let func_clone = func.clone();
        self.add_function(Box::new(func))?;
        self.msd_instance += 1;
--- a/src/otg/msd.rs
+++ b/src/otg/msd.rs
@@ -56,13 +56,21 @@ impl MsdLunConfig {
 #[derive(Debug, Clone)]
 pub struct MsdFunction {
    name: String,
+    lun_capacity: u8,
 }

 impl MsdFunction {
-    pub fn new(instance: u8) -> Self {
-        Self {
-            name: format!("mass_storage.usb{}", instance),
+    pub fn new(instance: u8, lun_capacity: u8) -> Result<Self> {
+        if lun_capacity != 1 && lun_capacity != 8 {
+            return Err(AppError::BadRequest(format!(
+                "MSD LUN capacity must be 1 or 8, got {lun_capacity}"
+            )));
        }
+
+        Ok(Self {
+            name: format!("mass_storage.usb{}", instance),
+            lun_capacity,
+        })
    }

    fn function_path(&self, gadget_path: &Path) -> PathBuf {
@@ -73,6 +81,32 @@ impl MsdFunction {
        self.function_path(gadget_path).join(format!("lun.{}", lun))
    }

+    fn existing_lun_paths(&self, gadget_path: &Path) -> Result<Vec<(u16, PathBuf)>> {
+        let func_path = self.function_path(gadget_path);
+        if !func_path.exists() {
+            return Ok(Vec::new());
+        }
+
+        let entries = fs::read_dir(&func_path).map_err(|e| {
+            AppError::Internal(format!(
+                "Failed to read MSD function directory {}: {}",
+                func_path.display(),
+                e
+            ))
+        })?;
+        let mut luns = entries
+            .filter_map(|entry| {
+                let entry = entry.ok()?;
+                let name = entry.file_name();
+                let name = name.to_str()?;
+                let lun = name.strip_prefix("lun.")?.parse::<u16>().ok()?;
+                Some((lun, entry.path()))
+            })
+            .collect::<Vec<_>>();
+        luns.sort_by_key(|(lun, _)| *lun);
+        Ok(luns)
+    }
+
    pub async fn configure_lun_async(
        &self,
        gadget_path: &Path,
@@ -88,11 +122,32 @@ impl MsdFunction {
            .map_err(|e| AppError::Internal(format!("Task join error: {}", e)))?
    }

+    fn clear_lun_unbound(&self, gadget_path: &Path, lun: u8) -> Result<()> {
+        let lun_path = self.lun_path(gadget_path, lun);
+        if !lun_path.exists() {
+            create_dir(&lun_path)?;
+        }
+        write_file(&lun_path.join("file"), "")?;
+        let _ = write_file(&lun_path.join("cdrom"), "0");
+        let _ = write_file(&lun_path.join("ro"), "0");
+        let _ = write_file(&lun_path.join("removable"), "1");
+        let _ = write_file(&lun_path.join("nofua"), "1");
+        Ok(())
+    }
+
    pub fn configure_lun(&self, gadget_path: &Path, lun: u8, config: &MsdLunConfig) -> Result<()> {
+        if lun >= self.lun_capacity {
+            return Err(AppError::BadRequest(format!(
+                "LUN {lun} is outside MSD capacity {}",
+                self.lun_capacity
+            )));
+        }
        let lun_path = self.lun_path(gadget_path, lun);

        if !lun_path.exists() {
-            create_dir(&lun_path)?;
+            return Err(AppError::Internal(format!(
+                "Configured MSD LUN {lun} does not exist"
+            )));
        }

        let read_attr = |attr: &str| -> String {
@@ -210,8 +265,18 @@ impl MsdFunction {
    }

    pub fn disconnect_lun(&self, gadget_path: &Path, lun: u8) -> Result<()> {
+        if lun >= self.lun_capacity {
+            return Err(AppError::BadRequest(format!(
+                "LUN {lun} is outside MSD capacity {}",
+                self.lun_capacity
+            )));
+        }
        let lun_path = self.lun_path(gadget_path, lun);

+        self.disconnect_lun_path(&lun_path, lun as u16)
+    }
+
+    fn disconnect_lun_path(&self, lun_path: &Path, lun: u16) -> Result<()> {
        if lun_path.exists() {
            let forced_eject_path = lun_path.join("forced_eject");
            if forced_eject_path.exists() {
@@ -226,11 +291,17 @@ impl MsdFunction {
                            "forced_eject write failed: {}, falling back to clearing file",
                            e
                        );
-                        write_file(&lun_path.join("file"), "")?;
+                        let file_path = lun_path.join("file");
+                        if file_path.exists() {
+                            write_file(&file_path, "")?;
+                        }
                    }
                }
            } else {
-                write_file(&lun_path.join("file"), "")?;
+                let file_path = lun_path.join("file");
+                if file_path.exists() {
+                    write_file(&file_path, "")?;
+                }
            }
            info!("LUN {} disconnected", lun);
        }
@@ -275,16 +346,10 @@ impl GadgetFunction for MsdFunction {
            let _ = write_file(&stall_path, "0");
        }

-        let lun0_path = func_path.join("lun.0");
-        if !lun0_path.exists() {
-            create_dir(&lun0_path)?;
+        for lun in 0..self.lun_capacity {
+            self.clear_lun_unbound(gadget_path, lun)?;
        }

-        let _ = write_file(&lun0_path.join("cdrom"), "0");
-        let _ = write_file(&lun0_path.join("ro"), "0");
-        let _ = write_file(&lun0_path.join("removable"), "1");
-        let _ = write_file(&lun0_path.join("nofua"), "1");
-
        debug!("Created MSD function: {}", self.name());
        Ok(())
    }
@@ -311,8 +376,25 @@ impl GadgetFunction for MsdFunction {
    fn cleanup(&self, gadget_path: &Path) -> Result<()> {
        let func_path = self.function_path(gadget_path);

-        for lun in 0..8 {
-            let _ = self.disconnect_lun(gadget_path, lun);
+        let lun_paths = match self.existing_lun_paths(gadget_path) {
+            Ok(luns) => luns,
+            Err(e) => {
+                warn!("Could not enumerate MSD LUN directories: {}", e);
+                Vec::new()
+            }
+        };
+        for (lun, lun_path) in lun_paths {
+            if let Err(e) = self.disconnect_lun_path(&lun_path, lun) {
+                warn!("Could not disconnect LUN {} during cleanup: {}", lun, e);
+            }
+            // lun.0 is the mass-storage function's configfs default group. It
+            // cannot be removed directly and is released with the function.
+            if lun == 0 {
+                continue;
+            }
+            if let Err(e) = remove_dir(&lun_path) {
+                warn!("Could not remove LUN {} directory: {}", lun, e);
+            }
        }

        if let Err(e) = remove_dir(&func_path) {
@@ -327,6 +409,7 @@ impl GadgetFunction for MsdFunction {
 #[cfg(test)]
 mod tests {
    use super::*;
+    use tempfile::TempDir;

    #[test]
    fn test_lun_config_cdrom() {
@@ -346,8 +429,86 @@ mod tests {

    #[test]
    fn test_msd_function_name() {
-        let msd = MsdFunction::new(0);
+        let msd = MsdFunction::new(0, 1).unwrap();
        assert_eq!(msd.name(), "mass_storage.usb0");
        assert_eq!(msd.endpoints_required(), 2);
+        assert_eq!(msd.lun_capacity, 1);
+
+        let multi = MsdFunction::new(0, 8).unwrap();
+        assert_eq!(multi.lun_capacity, 8);
+    }
+
+    #[test]
+    fn test_msd_function_rejects_invalid_capacity() {
+        assert!(MsdFunction::new(0, 0).is_err());
+        assert!(MsdFunction::new(0, 2).is_err());
+        assert!(MsdFunction::new(0, 9).is_err());
+    }
+
+    #[test]
+    fn create_uses_configured_lun_capacity() {
+        for capacity in [1, 8] {
+            let temp_dir = TempDir::new().unwrap();
+            std::fs::create_dir_all(temp_dir.path().join("functions")).unwrap();
+            let msd = MsdFunction::new(0, capacity).unwrap();
+
+            msd.create(temp_dir.path()).unwrap();
+
+            for lun in 0..capacity {
+                assert!(msd.lun_path(temp_dir.path(), lun).exists());
+            }
+            assert!(!msd.lun_path(temp_dir.path(), capacity).exists());
+        }
+    }
+
+    #[test]
+    fn configure_lun_does_not_rebind_udc() {
+        let temp_dir = TempDir::new().unwrap();
+        let lun_path = temp_dir.path().join("functions/mass_storage.usb0/lun.0");
+        std::fs::create_dir_all(&lun_path).unwrap();
+        for attr in ["file", "cdrom", "ro", "removable", "nofua"] {
+            std::fs::write(lun_path.join(attr), b"0\n").unwrap();
+        }
+        std::fs::write(temp_dir.path().join("UDC"), b"test.udc\n").unwrap();
+        let image_path = temp_dir.path().join("test.img");
+        std::fs::write(&image_path, b"image").unwrap();
+        let msd = MsdFunction::new(0, 1).unwrap();
+
+        msd.configure_lun(temp_dir.path(), 0, &MsdLunConfig::disk(image_path, false))
+            .unwrap();
+
+        assert_eq!(
+            std::fs::read_to_string(temp_dir.path().join("UDC")).unwrap(),
+            "test.udc\n"
+        );
+    }
+
+    #[test]
+    fn cleanup_removes_all_dynamic_luns_including_stale_capacity() {
+        let temp_dir = TempDir::new().unwrap();
+        let func_path = temp_dir.path().join("functions/mass_storage.usb0");
+        for lun in 1..8 {
+            std::fs::create_dir_all(func_path.join(format!("lun.{lun}"))).unwrap();
+        }
+        let msd = MsdFunction::new(0, 1).unwrap();
+
+        msd.cleanup(temp_dir.path()).unwrap();
+
+        assert!(!func_path.exists());
+    }
+
+    #[test]
+    fn cleanup_leaves_default_lun_for_configfs_function_removal() {
+        let temp_dir = TempDir::new().unwrap();
+        let func_path = temp_dir.path().join("functions/mass_storage.usb0");
+        for lun in 0..2 {
+            std::fs::create_dir_all(func_path.join(format!("lun.{lun}"))).unwrap();
+        }
+        let msd = MsdFunction::new(0, 1).unwrap();
+
+        msd.cleanup(temp_dir.path()).unwrap();
+
+        assert!(func_path.join("lun.0").exists());
+        assert!(!func_path.join("lun.1").exists());
    }
 }
--- a/src/otg/service.rs
+++ b/src/otg/service.rs
@@ -38,6 +38,7 @@ pub(crate) struct OtgDesiredState {
    pub hid_functions: Option<OtgHidFunctions>,
    pub keyboard_leds: bool,
    pub msd_enabled: bool,
+    pub msd_lun_capacity: u8,
    pub max_endpoints: u8,
 }

@@ -49,6 +50,7 @@ impl Default for OtgDesiredState {
            hid_functions: None,
            keyboard_leds: false,
            msd_enabled: false,
+            msd_lun_capacity: 1,
            max_endpoints: super::endpoint::DEFAULT_MAX_ENDPOINTS,
        }
    }
@@ -71,6 +73,7 @@ impl OtgDesiredState {
            hid_functions,
            keyboard_leds: hid.effective_otg_keyboard_leds(),
            msd_enabled: msd.enabled,
+            msd_lun_capacity: 1,
            max_endpoints: hid
                .resolved_otg_endpoint_limit()
                .unwrap_or(super::endpoint::DEFAULT_MAX_ENDPOINTS),
@@ -83,11 +86,12 @@ impl OtgDesiredState {
    }
 }

-#[derive(Debug, Clone, Default)]
+#[derive(Debug, Clone)]
 struct OtgServiceState {
    pub gadget_active: bool,
    pub hid_enabled: bool,
    pub msd_enabled: bool,
+    pub msd_lun_capacity: u8,
    pub configured_udc: Option<String>,
    pub hid_paths: Option<HidDevicePaths>,
    pub hid_functions: Option<OtgHidFunctions>,
@@ -97,6 +101,24 @@ struct OtgServiceState {
    pub error: Option<String>,
 }

+impl Default for OtgServiceState {
+    fn default() -> Self {
+        Self {
+            gadget_active: false,
+            hid_enabled: false,
+            msd_enabled: false,
+            msd_lun_capacity: 1,
+            configured_udc: None,
+            hid_paths: None,
+            hid_functions: None,
+            keyboard_leds_enabled: false,
+            max_endpoints: super::endpoint::DEFAULT_MAX_ENDPOINTS,
+            descriptor: None,
+            error: None,
+        }
+    }
+}
+
 pub struct OtgService {
    manager: Mutex<Option<OtgGadgetManager>>,
    state: RwLock<OtgServiceState>,
@@ -131,8 +153,41 @@ impl OtgService {
        self.msd_function.read().await.clone()
    }

+    pub async fn msd_lun_capacity(&self) -> u8 {
+        self.desired.read().await.msd_lun_capacity
+    }
+
    pub async fn apply_config(&self, hid: &HidConfig, msd: &MsdConfig) -> Result<()> {
-        let desired = OtgDesiredState::from_config(hid, msd)?;
+        let desired = self
+            .desired_from_config_preserving_runtime(hid, msd)
+            .await?;
+        self.apply_desired_state(desired).await
+    }
+
+    async fn desired_from_config_preserving_runtime(
+        &self,
+        hid: &HidConfig,
+        msd: &MsdConfig,
+    ) -> Result<OtgDesiredState> {
+        let mut desired = OtgDesiredState::from_config(hid, msd)?;
+        desired.msd_lun_capacity = self.desired.read().await.msd_lun_capacity;
+        Ok(desired)
+    }
+
+    pub async fn set_msd_lun_capacity(&self, capacity: u8) -> Result<()> {
+        if capacity != 1 && capacity != 8 {
+            return Err(AppError::BadRequest(format!(
+                "MSD LUN capacity must be 1 or 8, got {capacity}"
+            )));
+        }
+
+        let mut desired = self.desired.read().await.clone();
+        if !desired.msd_enabled {
+            return Err(AppError::Internal(
+                "MSD is not enabled in the OTG gadget".to_string(),
+            ));
+        }
+        desired.msd_lun_capacity = capacity;
        self.apply_desired_state(desired).await
    }

@@ -160,6 +215,7 @@ impl OtgService {
            if state.gadget_active
                && state.hid_enabled == desired.hid_enabled()
                && state.msd_enabled == desired.msd_enabled
+                && state.msd_lun_capacity == desired.msd_lun_capacity
                && state.configured_udc == desired.udc
                && state.hid_functions == desired.hid_functions
                && state.keyboard_leds_enabled == desired.keyboard_leds
@@ -188,6 +244,7 @@ impl OtgService {
            state.gadget_active = false;
            state.hid_enabled = false;
            state.msd_enabled = false;
+            state.msd_lun_capacity = 1;
            state.configured_udc = None;
            state.hid_paths = None;
            state.hid_functions = None;
@@ -280,7 +337,7 @@ impl OtgService {
        }

        let msd_func = if desired.msd_enabled {
-            match manager.add_msd() {
+            match manager.add_msd(desired.msd_lun_capacity) {
                Ok(func) => {
                    debug!("MSD function added to gadget");
                    Some(func)
@@ -323,6 +380,7 @@ impl OtgService {
            state.gadget_active = true;
            state.hid_enabled = desired.hid_enabled();
            state.msd_enabled = desired.msd_enabled;
+            state.msd_lun_capacity = desired.msd_lun_capacity;
            state.configured_udc = Some(udc);
            state.hid_paths = hid_paths;
            state.hid_functions = desired.hid_functions;
@@ -393,4 +451,32 @@ mod tests {
        let _service = OtgService::new();
        let _ = OtgService::is_available();
    }
+
+    #[tokio::test]
+    async fn service_starts_with_single_lun_capacity() {
+        let service = OtgService::new();
+        assert_eq!(service.desired.read().await.msd_lun_capacity, 1);
+        assert_eq!(service.state.read().await.msd_lun_capacity, 1);
+    }
+
+    #[tokio::test]
+    async fn config_updates_preserve_runtime_lun_capacity() {
+        let service = OtgService::new();
+        service.desired.write().await.msd_lun_capacity = 8;
+
+        let desired = service
+            .desired_from_config_preserving_runtime(&HidConfig::default(), &MsdConfig::default())
+            .await
+            .unwrap();
+
+        assert_eq!(desired.msd_lun_capacity, 8);
+    }
+
+    #[test]
+    fn lun_capacity_participates_in_desired_state_equality() {
+        let single = OtgDesiredState::default();
+        let mut multi = single.clone();
+        multi.msd_lun_capacity = 8;
+        assert_ne!(single, multi);
+    }
 }
--- a/src/redfish/routes/virtual_media.rs
+++ b/src/redfish/routes/virtual_media.rs
@@ -70,19 +70,13 @@ async fn virtual_media_detail(
            Some(msd) => {
                let msd_state = msd.state().await;
                let img_name = msd_state
-                    .current_image
-                    .as_ref()
-                    .map(|i| i.name.clone())
-                    .or_else(|| {
-                        msd_state
-                            .drive_info
-                            .as_ref()
-                            .map(|_| "Virtual Drive".to_string())
-                    });
+                    .mounted_media
+                    .first()
+                    .map(|media| media.name.clone());
                (
-                    msd_state.connected,
+                    !msd_state.mounted_media.is_empty(),
                    img_name,
-                    if msd_state.connected {
+                    if !msd_state.mounted_media.is_empty() {
                        Some("Applet".to_string())
                    } else {
                        None
@@ -153,7 +147,7 @@ async fn virtual_media_insert(
            None => return service_unavailable("MSD not available"),
        };

-        if msd.state().await.connected {
+        if !msd.state().await.mounted_media.is_empty() {
            return (
                StatusCode::CONFLICT,
                Json(RedfishError::general_error(
@@ -164,7 +158,7 @@ async fn virtual_media_insert(
        }

        info!("Redfish: VirtualMedia.InsertMedia image='{}'", req.image);
-        msd.connect_drive().await
+        msd.mount_drive().await
    };

    match result {
@@ -201,7 +195,7 @@ async fn virtual_media_eject(
            None => return service_unavailable("MSD not available"),
        };

-        if !msd.state().await.connected {
+        if msd.state().await.mounted_media.is_empty() {
            return (
                StatusCode::CONFLICT,
                Json(RedfishError::general_error("No virtual media inserted")),
--- a/src/state.rs
+++ b/src/state.rs
@@ -8,8 +8,8 @@ use crate::computer_use::ComputerUseManager;
 use crate::config::ConfigStore;
 use crate::db::DatabasePool;
 use crate::events::{
-    AtxDeviceInfo, AudioDeviceInfo, EventBus, HidDeviceInfo, LedState, MsdDeviceInfo, SystemEvent,
-    TtydDeviceInfo, VideoDeviceInfo,
+    AtxDeviceInfo, AudioDeviceInfo, EventBus, HidDeviceInfo, LedState, MsdDeviceInfo,
+    MsdDeviceMediaInfo, SystemEvent, TtydDeviceInfo, VideoDeviceInfo,
 };
 use crate::extensions::{ExtensionId, ExtensionManager};
 use crate::hid::HidController;
@@ -231,16 +231,33 @@ impl AppState {

            let state = msd.state().await;
            let error = msd.monitor().error_message().await;
+            let mounted_media = state
+                .mounted_media
+                .iter()
+                .map(|media| MsdDeviceMediaInfo {
+                    id: media.id.clone(),
+                    kind: match media.kind {
+                        crate::msd::MountedMediaKind::Drive => "drive",
+                        crate::msd::MountedMediaKind::Image => "image",
+                    }
+                    .to_string(),
+                    name: media.name.clone(),
+                    cdrom: media.cdrom,
+                    read_only: media.read_only,
+                    size: media.size,
+                })
+                .collect::<Vec<_>>();
            Some(MsdDeviceInfo {
                available: state.available,
-                mode: match state.mode {
-                    crate::msd::MsdMode::None => "none",
-                    crate::msd::MsdMode::Image => "image",
-                    crate::msd::MsdMode::Drive => "drive",
+                disk_mode: match state.disk_mode {
+                    crate::msd::DiskMode::Single => "single",
+                    crate::msd::DiskMode::Multi => "multi",
                }
                .to_string(),
-                connected: state.connected,
-                image_id: state.current_image.map(|img| img.id),
+                slot_capacity: state.disk_mode.capacity(),
+                mounted_count: state.mounted_media.len() as u8,
+                mounted_media,
+                usb_reenumerating: state.usb_reenumerating,
                error,
            })
        }
--- a/src/web/handlers/msd_api.rs
+++ b/src/web/handlers/msd_api.rs
@@ -1,8 +1,10 @@
+use super::config::apply::try_apply_lock;
 use super::*;

 use crate::msd::{
-    DownloadProgress, DriveFile, DriveInfo, DriveInitRequest, ImageDownloadRequest, ImageInfo,
-    ImageManager, MsdConnectRequest, MsdMode, MsdState, VentoyDrive, MIN_DRIVE_SIZE_MB,
+    DiskModeRequest, DownloadProgress, DriveFile, DriveInfo, DriveInitRequest,
+    ImageDownloadRequest, ImageInfo, ImageManager, ImageMountRequest, MsdState, MsdStateResponse,
+    VentoyDrive, MIN_DRIVE_SIZE_MB,
 };
 #[cfg(unix)]
 use axum::body::Body;
@@ -26,8 +28,7 @@ const MIB: u64 = 1024 * 1024;
 async fn assert_drive_not_connected(state: &Arc<AppState>) -> Result<()> {
    let msd_guard = state.msd.read().await;
    if let Some(controller) = msd_guard.as_ref() {
-        let msd_state = controller.state().await;
-        if msd_state.connected && msd_state.mode == crate::msd::types::MsdMode::Drive {
+        if controller.is_drive_connected().await {
            return Err(AppError::BadRequest(
                "Virtual drive is connected to the USB host; disconnect it before modifying files"
                    .to_string(),
@@ -77,7 +78,7 @@ fn unsupported_drive_filesystem_error(error: &str) -> AppError {
 #[derive(Serialize)]
 pub struct MsdStatus {
    pub available: bool,
-    pub state: MsdState,
+    pub state: MsdStateResponse,
 }

 /// Get MSD status
@@ -89,12 +90,12 @@ pub async fn msd_status(State(state): State<Arc<AppState>>) -> Result<Json<MsdSt
            let msd_state = controller.state().await;
            Ok(Json(MsdStatus {
                available: true,
-                state: msd_state,
+                state: MsdStateResponse::from(&msd_state),
            }))
        }
        None => Ok(Json(MsdStatus {
            available: false,
-            state: MsdState::default(),
+            state: MsdStateResponse::from(&MsdState::default()),
        })),
    }
 }
@@ -164,11 +165,11 @@ pub async fn msd_image_delete(
    State(state): State<Arc<AppState>>,
    AxumPath(id): AxumPath<String>,
 ) -> Result<Json<LoginResponse>> {
-    let config = state.config.get();
-    let images_path = config.msd.images_dir();
-    let manager = ImageManager::new(images_path);
-
-    manager.delete(&id)?;
+    let msd_guard = state.msd.read().await;
+    let controller = msd_guard
+        .as_ref()
+        .ok_or_else(|| AppError::Internal("MSD not initialized".to_string()))?;
+    controller.delete_image(&id).await?;
    Ok(Json(LoginResponse {
        success: true,
        message: Some("Image deleted".to_string()),
@@ -216,11 +217,81 @@ pub async fn msd_image_download_cancel(
    }))
 }

-/// Connect MSD (image or drive)
+/// Change MSD disk mode. This clears all mounted media and re-enumerates USB.
 #[cfg(unix)]
-pub async fn msd_connect(
+pub async fn msd_disk_mode_put(
    State(state): State<Arc<AppState>>,
-    Json(req): Json<MsdConnectRequest>,
+    Json(req): Json<DiskModeRequest>,
+) -> Result<Json<LoginResponse>> {
+    let _otg_guard = try_apply_lock(&state.config_apply_locks.otg, "OTG")?;
+    let current_mode = {
+        let msd_guard = state.msd.read().await;
+        let controller = msd_guard
+            .as_ref()
+            .ok_or_else(|| AppError::Internal("MSD not initialized".to_string()))?;
+        controller.state().await.disk_mode
+    };
+    if current_mode == req.disk_mode {
+        return Ok(Json(LoginResponse {
+            success: true,
+            message: Some("MSD disk mode updated".to_string()),
+        }));
+    }
+
+    let hid_is_otg = matches!(
+        state.hid.backend_type().await,
+        crate::hid::HidBackendType::Otg
+    );
+
+    if hid_is_otg {
+        state
+            .hid
+            .prepare_otg_rebuild()
+            .await
+            .map_err(|e| AppError::Config(format!("Failed to prepare OTG HID for rebuild: {e}")))?;
+    }
+
+    let switch_result = {
+        let mut msd_guard = state.msd.write().await;
+        let controller = msd_guard
+            .as_mut()
+            .ok_or_else(|| AppError::Internal("MSD not initialized".to_string()))?;
+        controller.set_disk_mode(req.disk_mode).await
+    };
+
+    let hid_reload_result = if hid_is_otg {
+        state
+            .hid
+            .reload(crate::hid::HidBackendType::Otg)
+            .await
+            .map_err(|e| AppError::Config(format!("OTG HID reload failed: {e}")))
+    } else {
+        Ok(())
+    };
+
+    match (switch_result, hid_reload_result) {
+        (Err(switch_error), Err(hid_error)) => {
+            return Err(AppError::Internal(format!(
+                "MSD disk mode switch failed: {switch_error}; HID recovery failed: {hid_error}"
+            )));
+        }
+        (Err(switch_error), Ok(())) => return Err(switch_error),
+        (Ok(_), Err(hid_error)) => return Err(hid_error),
+        (Ok(_), Ok(())) => {}
+    }
+
+    Ok(Json(LoginResponse {
+        success: true,
+        message: Some("MSD disk mode updated".to_string()),
+    }))
+}
+
+/// Mount an image into the next available media slot.
+#[cfg(unix)]
+pub async fn msd_image_mount(
+    State(state): State<Arc<AppState>>,
+    AxumPath(id): AxumPath<String>,
+    Json(req): Json<ImageMountRequest>,
 ) -> Result<Json<LoginResponse>> {
    let config = state.config.get();
    let mut msd_guard = state.msd.write().await;
@@ -228,50 +299,68 @@ pub async fn msd_connect(
        .as_mut()
        .ok_or_else(|| AppError::Internal("MSD not initialized".to_string()))?;

-    match req.mode {
-        MsdMode::Image => {
-            let image_id = req.image_id.ok_or_else(|| {
-                AppError::BadRequest("image_id required for image mode".to_string())
-            })?;
+    let images_path = config.msd.images_dir();
+    let manager = ImageManager::new(images_path);
+    let image = manager.get(&id)?;

-            // Get image info from ImageManager
-            let images_path = config.msd.images_dir();
-            let manager = ImageManager::new(images_path);
-            let image = manager.get(&image_id)?;
-
-            // Get mount options from request (defaults: cdrom=false, read_only=false)
-            let cdrom = req.cdrom.unwrap_or(false);
-            let read_only = req.read_only.unwrap_or(false);
-
-            controller.connect_image(&image, cdrom, read_only).await?;
-        }
-        MsdMode::Drive => {
-            controller.connect_drive().await?;
-        }
-        MsdMode::None => {
-            return Err(AppError::BadRequest("Invalid mode: none".to_string()));
-        }
-    }
+    controller
+        .mount_image(&image, req.cdrom, req.read_only)
+        .await?;

    Ok(Json(LoginResponse {
        success: true,
-        message: Some("MSD connected".to_string()),
+        message: Some("Image mounted".to_string()),
    }))
 }

-/// Disconnect MSD
+/// Unmount an image from whichever internal LUN currently holds it.
 #[cfg(unix)]
-pub async fn msd_disconnect(State(state): State<Arc<AppState>>) -> Result<Json<LoginResponse>> {
+pub async fn msd_image_unmount(
+    State(state): State<Arc<AppState>>,
+    AxumPath(id): AxumPath<String>,
+) -> Result<Json<LoginResponse>> {
    let mut msd_guard = state.msd.write().await;
    let controller = msd_guard
        .as_mut()
        .ok_or_else(|| AppError::Internal("MSD not initialized".to_string()))?;

-    controller.disconnect().await?;
+    controller.unmount_image(&id).await?;

    Ok(Json(LoginResponse {
        success: true,
-        message: Some("MSD disconnected".to_string()),
+        message: Some("Image unmounted".to_string()),
+    }))
+}
+
+/// Mount the virtual USB drive into the next available media slot.
+#[cfg(unix)]
+pub async fn msd_drive_mount(State(state): State<Arc<AppState>>) -> Result<Json<LoginResponse>> {
+    let mut msd_guard = state.msd.write().await;
+    let controller = msd_guard
+        .as_mut()
+        .ok_or_else(|| AppError::Internal("MSD not initialized".to_string()))?;
+
+    controller.mount_drive().await?;
+
+    Ok(Json(LoginResponse {
+        success: true,
+        message: Some("Virtual drive mounted".to_string()),
+    }))
+}
+
+/// Unmount the virtual USB drive.
+#[cfg(unix)]
+pub async fn msd_drive_unmount(State(state): State<Arc<AppState>>) -> Result<Json<LoginResponse>> {
+    let mut msd_guard = state.msd.write().await;
+    let controller = msd_guard
+        .as_mut()
+        .ok_or_else(|| AppError::Internal("MSD not initialized".to_string()))?;
+
+    controller.unmount_drive().await?;
+
+    Ok(Json(LoginResponse {
+        success: true,
+        message: Some("Virtual drive unmounted".to_string()),
    }))
 }

@@ -335,8 +424,7 @@ pub async fn msd_drive_delete(State(state): State<Arc<AppState>>) -> Result<Json
    // Check if drive is currently connected
    let msd_guard = state.msd.write().await;
    if let Some(controller) = msd_guard.as_ref() {
-        let msd_state = controller.state().await;
-        if msd_state.connected && msd_state.mode == crate::msd::types::MsdMode::Drive {
+        if controller.is_drive_connected().await {
            return Err(AppError::BadRequest(
                "Cannot delete drive while connected. Disconnect first.".to_string(),
            ));
--- a/src/web/routes.rs
+++ b/src/web/routes.rs
@@ -2,7 +2,7 @@
 use axum::{extract::DefaultBodyLimit, routing::delete};
 use axum::{
    middleware,
-    routing::{any, get, patch, post},
+    routing::{any, get, patch, post, put},
    Router,
 };
 use std::sync::Arc;
@@ -255,10 +255,16 @@ pub fn create_router(state: Arc<AppState>) -> Router {
            )
            .route("/msd/images/{id}", get(handlers::msd_image_get))
            .route("/msd/images/{id}", delete(handlers::msd_image_delete))
-            .route("/msd/connect", post(handlers::msd_connect))
-            .route("/msd/disconnect", post(handlers::msd_disconnect))
+            .route("/msd/disk-mode", put(handlers::msd_disk_mode_put))
+            .route("/msd/images/{id}/mount", post(handlers::msd_image_mount))
+            .route(
+                "/msd/images/{id}/mount",
+                delete(handlers::msd_image_unmount),
+            )
            .route("/msd/drive", get(handlers::msd_drive_info))
            .route("/msd/drive", delete(handlers::msd_drive_delete))
+            .route("/msd/drive/mount", post(handlers::msd_drive_mount))
+            .route("/msd/drive/mount", delete(handlers::msd_drive_unmount))
            .route("/msd/drive/init", post(handlers::msd_drive_init))
            .route("/msd/drive/files", get(handlers::msd_drive_files))
            .route(
--- a/test/okvm-test/README.md
+++ b/test/okvm-test/README.md
@@ -159,7 +159,7 @@ MSD 测试依赖 OTG。流程如下：
 2. 如果资源缺失，默认从 `libs/ventoy-img-rs/resources` 解压并通过 SSH/SFTP 同步到目标机。
 3. 启用 MSD 后重启 `one-kvm`，确保 Ventoy 资源在服务进程中初始化。
 4. 通过 `/api/msd/drive/init` 创建小型虚拟盘。
-5. 通过 `/api/msd/connect {"mode":"drive"}` 连接到 Windows。
+5. 通过 `/api/msd/drive/mount` 连接到 Windows。
 6. Windows agent 等待新盘符出现。
 7. Windows agent 写入测试文件、同步到虚拟盘、优先用未缓存读取读回并校验 SHA-256，同时输出简单写入/读取速度。若 Windows/驱动不支持未缓存读取，会退回缓存读取并在报告中标为“仅校验”，不作为真实读盘速度。
 8. 控制端断开 MSD，Windows agent 确认盘符消失。
--- a/web/src/api/index.ts
+++ b/web/src/api/index.ts
@@ -542,25 +542,34 @@ export interface DriveFile {
  size: number
 }

+export type DiskMode = 'single' | 'multi'
+export type MountedMediaKind = 'drive' | 'image'
+
+export interface MountedMedia {
+  id: string
+  kind: MountedMediaKind
+  name: string
+  cdrom: boolean
+  read_only: boolean
+  size: number
+}
+
 export const msdApi = {
  status: () =>
    request<{
      available: boolean
      state: {
-        connected: boolean
-        mode: 'none' | 'image' | 'drive'
-        current_image: {
-          id: string
-          name: string
-          size: number
-          created_at: string
-        } | null
+        disk_mode: DiskMode
+        slot_capacity: number
+        mounted_count: number
+        mounted_media: MountedMedia[]
        drive_info: {
          size: number
          used: number
          free: number
          initialized: boolean
        } | null
+        usb_reenumerating: boolean
      }
    }>('/msd/status'),

@@ -597,14 +606,26 @@ export const msdApi = {
  deleteImage: (id: string) =>
    request<{ success: boolean }>(`/msd/images/${id}`, { method: 'DELETE' }),

-  connect: (mode: 'image' | 'drive', imageId?: string, cdrom?: boolean, readOnly?: boolean) =>
-    request<{ success: boolean }>('/msd/connect', {
-      method: 'POST',
-      body: JSON.stringify({ mode, image_id: imageId, cdrom, read_only: readOnly }),
+  setDiskMode: (diskMode: DiskMode) =>
+    request<{ success: boolean }>('/msd/disk-mode', {
+      method: 'PUT',
+      body: JSON.stringify({ disk_mode: diskMode }),
    }),

-  disconnect: () =>
-    request<{ success: boolean }>('/msd/disconnect', { method: 'POST' }),
+  mountImage: (id: string, cdrom: boolean, readOnly: boolean) =>
+    request<{ success: boolean }>(`/msd/images/${id}/mount`, {
+      method: 'POST',
+      body: JSON.stringify({ cdrom, read_only: readOnly }),
+    }),
+
+  unmountImage: (id: string) =>
+    request<{ success: boolean }>(`/msd/images/${id}/mount`, { method: 'DELETE' }),
+
+  mountDrive: () =>
+    request<{ success: boolean }>('/msd/drive/mount', { method: 'POST' }),
+
+  unmountDrive: () =>
+    request<{ success: boolean }>('/msd/drive/mount', { method: 'DELETE' }),

  driveInfo: () =>
    request<{
--- a/web/src/components/MsdDialog.vue
+++ b/web/src/components/MsdDialog.vue
@@ -3,7 +3,7 @@ import { ref, onMounted, onUnmounted, computed, watch } from 'vue'
 import { useI18n } from 'vue-i18n'
 import { toast } from 'vue-sonner'
 import { useSystemStore } from '@/stores/system'
-import { msdApi, type MsdImage, type DriveFile } from '@/api'
+import { msdApi, type MsdImage, type DriveFile, type MountedMedia, type DiskMode } from '@/api'
 import { ApiError } from '@/api/request'
 import { useWebSocket } from '@/composables/useWebSocket'
 import {
@@ -48,7 +48,6 @@ import {
  AlertCircle,
  Info,
 } from 'lucide-vue-next'
-import HelpTooltip from '@/components/HelpTooltip.vue'

 const props = defineProps<{
  open: boolean
@@ -77,8 +76,11 @@ const cdromMode = computed(() => mountMode.value === 'cdrom')
 const readOnly = computed(() => accessMode.value === 'readonly')

 const connecting = ref(false)
-const disconnecting = ref(false)
 const deleting = ref(false)
+const modeChanging = ref(false)
+const unmountingMediaId = ref<string | null>(null)
+const pendingMountImage = ref<MsdImage | null>(null)
+const showMountOptionsDialog = ref(false)

 const driveFiles = ref<DriveFile[]>([])
 const currentPath = ref('/')
@@ -149,28 +151,62 @@ const downloadProgress = ref<{
 } | null>(null)

 const TWO_POINT_TWO_GB = 2.2 * 1024 * 1024 * 1024
+const tabTriggerClass = 'h-9 rounded-md border border-transparent bg-transparent text-center text-muted-foreground shadow-none hover:text-foreground data-[state=active]:border-border data-[state=active]:bg-background data-[state=active]:text-foreground data-[state=active]:shadow-sm'
+const segmentedGroupClass = 'grid w-full grid-cols-2 items-center gap-1 rounded-md bg-muted p-1'
+const segmentedItemClass = 'h-8 w-full justify-center rounded-md border border-transparent bg-transparent px-3 text-center text-xs text-muted-foreground shadow-none hover:bg-background/60 hover:text-foreground data-[state=on]:border-border data-[state=on]:bg-background data-[state=on]:text-foreground data-[state=on]:shadow-sm'

-const msdConnected = computed(() => systemStore.msd?.connected ?? false)
-const msdMode = computed(() => systemStore.msd?.mode ?? 'none')
+const diskMode = computed(() => systemStore.msd?.diskMode ?? 'single')
+const slotCapacity = computed(() => systemStore.msd?.slotCapacity ?? 1)
+const mountedMedia = computed<MountedMedia[]>(() => systemStore.msd?.mountedMedia ?? [])
+const mountedCount = computed(() => systemStore.msd?.mountedCount ?? mountedMedia.value.length)
+const msdConnected = computed(() => mountedCount.value > 0)
+const mediaSlotsFull = computed(() => mountedCount.value >= slotCapacity.value)
+const driveMedia = computed(() => mountedMedia.value.find(media => media.kind === 'drive') ?? null)
 // Drive is currently mounted on the target machine via USB — file ops are blocked
-const driveConnectedToTarget = computed(() => msdConnected.value && msdMode.value === 'drive')
+const driveConnectedToTarget = computed(() => !!driveMedia.value)



 const operationInProgress = computed(() => {
  return connecting.value ||
-         disconnecting.value ||
         deleting.value ||
         uploading.value ||
         uploadingFile.value ||
         initializingDrive.value ||
-         deletingDrive.value
+         deletingDrive.value ||
+         modeChanging.value ||
+         !!unmountingMediaId.value
 })

+const usbReenumerating = computed(() => systemStore.msd?.usbReenumerating || modeChanging.value)
+
 function isLargeFile(image: MsdImage): boolean {
  return image.size > TWO_POINT_TWO_GB
 }

+function isIsoImage(image: MsdImage): boolean {
+  return image.name.toLowerCase().endsWith('.iso')
+}
+
+function mountedImage(imageId: string): MountedMedia | null {
+  return mountedMedia.value.find(media => media.kind === 'image' && media.id === imageId) ?? null
+}
+
+function updateMountMode(value: unknown) {
+  const next = Array.isArray(value) ? value[0] : value
+  if (next !== 'cdrom' && next !== 'flash') return
+  mountMode.value = next
+  if (next === 'cdrom') {
+    accessMode.value = 'readonly'
+  }
+}
+
+function updateAccessMode(value: unknown) {
+  const next = Array.isArray(value) ? value[0] : value
+  if (next !== 'readonly' && next !== 'readwrite') return
+  accessMode.value = next
+}
+
 const breadcrumbs = computed(() => {
  const parts = currentPath.value.split('/').filter(Boolean)
  const crumbs = [{ name: '/', path: '/' }]
@@ -251,12 +287,30 @@ async function connectImage(image: MsdImage) {
    return
  }

+  if (mountedImage(image.id)) return
+  if (mediaSlotsFull.value) {
+    toast.error(t('msd.mediaSlotsFull'))
+    return
+  }
+
+  pendingMountImage.value = image
+  mountMode.value = isIsoImage(image) ? 'cdrom' : 'flash'
+  accessMode.value = isIsoImage(image) ? 'readonly' : 'readwrite'
+  showMountOptionsDialog.value = true
+}
+
+async function confirmImageMount() {
+  const image = pendingMountImage.value
+  if (!image || operationInProgress.value) return
+
  connecting.value = true
  try {
-    await msdApi.connect('image', image.id, cdromMode.value, readOnly.value)
+    await msdApi.mountImage(image.id, cdromMode.value, cdromMode.value || readOnly.value)
    await systemStore.fetchMsdState()
+    showMountOptionsDialog.value = false
+    pendingMountImage.value = null
  } catch (e) {
-    console.error('Failed to connect image:', e)
+    console.error('Failed to mount image:', e)
  } finally {
    connecting.value = false
  }
@@ -268,30 +322,61 @@ async function connectDrive() {
    return
  }

+  if (driveConnectedToTarget.value) return
+  if (mediaSlotsFull.value) {
+    toast.error(t('msd.mediaSlotsFull'))
+    return
+  }
+
  connecting.value = true
  try {
-    await msdApi.connect('drive')
+    await msdApi.mountDrive()
    await systemStore.fetchMsdState()
  } catch (e) {
-    console.error('Failed to connect drive:', e)
+    console.error('Failed to mount drive:', e)
  } finally {
    connecting.value = false
  }
 }

-async function disconnect() {
-  if (operationInProgress.value) {
-    return
-  }
+async function unmountMedia(media: MountedMedia) {
+  if (operationInProgress.value) return

-  disconnecting.value = true
+  unmountingMediaId.value = `${media.kind}:${media.id}`
  try {
-    await msdApi.disconnect()
+    if (media.kind === 'drive') {
+      await msdApi.unmountDrive()
+      await refreshDriveBrowser()
+    } else {
+      await msdApi.unmountImage(media.id)
+    }
    await systemStore.fetchMsdState()
  } catch (e) {
-    console.error('Failed to disconnect:', e)
+    console.error('Failed to unmount media:', e)
  } finally {
-    disconnecting.value = false
+    unmountingMediaId.value = null
+  }
+}
+
+async function unmountImageById(imageId: string) {
+  const media = mountedImage(imageId)
+  if (media) {
+    await unmountMedia(media)
+  }
+}
+
+async function changeDiskMode(value: unknown) {
+  const next = Array.isArray(value) ? value[0] : value
+  if ((next !== 'single' && next !== 'multi') || next === diskMode.value || operationInProgress.value) return
+
+  modeChanging.value = true
+  try {
+    await msdApi.setDiskMode(next as DiskMode)
+    await systemStore.fetchMsdState()
+  } catch (e) {
+    console.error('Failed to change MSD disk mode:', e)
+  } finally {
+    modeChanging.value = false
  }
 }

@@ -591,35 +676,60 @@ onUnmounted(() => {
 <template>
  <TooltipProvider>
    <Dialog :open="open" @update:open="emit('update:open', $event)">
-      <DialogContent class="sm:max-w-[600px] max-h-[90vh] overflow-hidden flex flex-col p-0">
+      <DialogContent class="max-h-[90vh] overflow-hidden p-0 sm:max-w-[760px] flex flex-col">
      <DialogHeader class="px-6 pt-6 shrink-0">
        <DialogTitle class="flex items-center gap-2">
          <HardDrive class="h-5 w-5" />
          {{ t('msd.title') }}
        </DialogTitle>
-        <DialogDescription class="flex items-center flex-wrap gap-x-2 gap-y-1 mt-1">
-          <span :class="msdConnected ? 'text-green-600 dark:text-green-400' : 'text-muted-foreground'" class="flex items-center gap-1.5">
-            <span class="relative flex h-2 w-2">
-              <span v-if="msdConnected" class="animate-ping absolute inline-flex h-full w-full rounded-full bg-green-400 opacity-75"></span>
-              <span :class="msdConnected ? 'bg-green-500' : 'bg-muted-foreground'" class="relative inline-flex rounded-full h-2 w-2"></span>
+        <DialogDescription as="div" class="mt-1 flex flex-col gap-2 sm:flex-row sm:items-center sm:justify-between">
+          <span class="flex min-w-0 flex-wrap items-center gap-x-2 gap-y-1">
+            <span :class="msdConnected ? 'text-green-600 dark:text-green-400' : 'text-muted-foreground'" class="flex items-center gap-1.5">
+              <span class="relative flex h-2 w-2">
+                <span v-if="msdConnected" class="animate-ping absolute inline-flex h-full w-full rounded-full bg-green-400 opacity-75"></span>
+                <span :class="msdConnected ? 'bg-green-500' : 'bg-muted-foreground'" class="relative inline-flex rounded-full h-2 w-2"></span>
+              </span>
+              {{ msdConnected ? t('common.connected') : t('common.disconnected') }}
            </span>
-            {{ msdConnected ? t('common.connected') : t('common.disconnected') }}
-          </span>
-          <template v-if="msdConnected">
            <span class="text-muted-foreground">·</span>
-            <Badge variant="secondary" class="text-xs">{{ msdMode === 'drive' ? t('msd.drive') : t('msd.images') }}</Badge>
-            <Button
+            <Badge variant="secondary" class="h-6 rounded-md px-2 text-xs">{{ t('msd.mediaCount', { count: mountedCount, capacity: slotCapacity }) }}</Badge>
+            <Badge
+              v-if="mediaSlotsFull"
              variant="outline"
-              size="sm"
-              class="h-6 px-2 text-xs text-destructive hover:text-destructive hover:bg-destructive/10 border-destructive/30"
-              :disabled="operationInProgress"
-              @click="disconnect"
+              class="h-6 rounded-md border-amber-500/40 bg-amber-500/10 px-2 text-xs text-amber-700 dark:text-amber-400"
            >
-              <Unlink v-if="!disconnecting" class="h-3 w-3 mr-1" />
-              <span v-if="disconnecting">{{ t('common.disconnecting') }}...</span>
-              <span v-else>{{ t('msd.disconnect') }}</span>
-            </Button>
-          </template>
+              {{ t('msd.mediaSlotsFull') }}
+            </Badge>
+            <span v-if="usbReenumerating" class="text-xs text-amber-600 dark:text-amber-400">
+              {{ t('msd.reenumerating') }}
+            </span>
+          </span>
+          <span class="flex w-full shrink-0 items-center gap-2 sm:w-auto">
+            <span class="flex shrink-0 items-center gap-1.5">
+              <span class="font-medium text-foreground">{{ t('msd.diskMode') }}</span>
+              <Tooltip>
+                <TooltipTrigger as-child>
+                  <span class="inline-flex h-4 w-4 items-center justify-center rounded-full text-muted-foreground hover:text-foreground">
+                    <Info class="h-3.5 w-3.5" />
+                  </span>
+                </TooltipTrigger>
+                <TooltipContent>
+                  <p class="max-w-xs">{{ t('msd.diskModeHint') }}</p>
+                </TooltipContent>
+              </Tooltip>
+            </span>
+            <ToggleGroup
+              :model-value="diskMode"
+              type="single"
+              size="sm"
+              :class="[segmentedGroupClass, 'min-w-0 flex-1 sm:w-[200px] sm:flex-none']"
+              :disabled="operationInProgress"
+              @update:model-value="changeDiskMode"
+            >
+              <ToggleGroupItem value="single" :class="segmentedItemClass">{{ t('msd.singleDiskMode') }}</ToggleGroupItem>
+              <ToggleGroupItem value="multi" :class="segmentedItemClass">{{ t('msd.multiDiskMode') }}</ToggleGroupItem>
+            </ToggleGroup>
+          </span>
        </DialogDescription>
      </DialogHeader>

@@ -627,86 +737,51 @@ onUnmounted(() => {

      <div class="flex-1 min-h-0 flex flex-col px-6 pb-6 pt-4">
        <Tabs v-model="activeTab" class="flex-1 flex flex-col min-h-0">
-          <TabsList class="w-full grid grid-cols-2 shrink-0">
-          <TabsTrigger value="images">
+          <TabsList class="grid h-auto w-full shrink-0 grid-cols-2 gap-1 rounded-md border border-border bg-muted p-1">
+          <TabsTrigger value="images" :class="tabTriggerClass">
            <Disc class="h-4 w-4 mr-1.5" />
            {{ t('msd.images') }}
          </TabsTrigger>
-          <TabsTrigger value="drive">
+          <TabsTrigger value="drive" :class="tabTriggerClass">
            <HardDrive class="h-4 w-4 mr-1.5" />
            {{ t('msd.drive') }}
          </TabsTrigger>
        </TabsList>

-        <!-- Tab Description -->
-        <p class="text-xs text-muted-foreground mt-2 mb-1 shrink-0">
-          {{ activeTab === 'images' ? t('msd.imagesDesc') : t('msd.driveDesc') }}
-        </p>
-
-          <TabsContent value="images" class="flex-1 min-h-0 m-0 flex flex-col space-y-3">
-            <!-- Compact Upload Toolbar -->
-            <div class="shrink-0 flex items-center gap-2 min-w-0">
-              <label class="flex-1">
-                <input
-                  type="file"
-                  class="hidden"
-                  accept=".iso,.img"
-                  :disabled="uploading"
-                  @change="handleImageUpload"
-                />
-                <Button variant="outline" size="sm" as="span" class="w-full cursor-pointer">
-                  <Upload class="h-4 w-4 mr-1.5" />
-                  {{ t('msd.uploadImage') }}
-                </Button>
-              </label>
-              <Button
-                variant="outline"
-                size="sm"
-                class="flex-1"
-                @click="showUrlDialog = true"
-              >
-                <Globe class="h-4 w-4 mr-1.5" />
-                {{ t('msd.downloadFromUrl') }}
-              </Button>
-            </div>
-            <Progress v-if="uploading" :model-value="uploadProgress" class="h-1 shrink-0" />
-
-            <!-- Options - Vertical compact layout -->
-            <div class="shrink-0 flex flex-wrap items-center gap-x-4 gap-y-2 p-2 rounded-lg bg-muted/50 text-xs min-w-0">
-              <div class="flex items-center gap-1.5">
-                <span class="text-muted-foreground whitespace-nowrap">{{ t('msd.storageMode') }}:</span>
-                <HelpTooltip :content="mountMode === 'flash' ? t('help.flashMode') : t('help.cdromMode')" icon-size="sm" />
-                <ToggleGroup v-model="mountMode" type="single" variant="outline" size="sm">
-                  <ToggleGroupItem value="flash" class="h-6 px-2 text-xs data-[state=on]:bg-primary data-[state=on]:text-primary-foreground">
-                    {{ t('msd.flash') }}
-                  </ToggleGroupItem>
-                  <ToggleGroupItem value="cdrom" class="h-6 px-2 text-xs data-[state=on]:bg-primary data-[state=on]:text-primary-foreground">
-                    {{ t('msd.cdrom') }}
-                  </ToggleGroupItem>
-                </ToggleGroup>
-              </div>
-              <div class="flex items-center gap-1.5">
-                <span class="text-muted-foreground whitespace-nowrap">{{ t('msd.accessMode') }}:</span>
-                <HelpTooltip :content="accessMode === 'readonly' ? t('help.readOnlyMode') : t('help.readWriteMode')" icon-size="sm" />
-                <ToggleGroup v-model="accessMode" type="single" variant="outline" size="sm">
-                  <ToggleGroupItem value="readonly" class="h-6 px-2 text-xs data-[state=on]:bg-primary data-[state=on]:text-primary-foreground">
-                    {{ t('msd.readOnly') }}
-                  </ToggleGroupItem>
-                  <ToggleGroupItem value="readwrite" class="h-6 px-2 text-xs data-[state=on]:bg-primary data-[state=on]:text-primary-foreground">
-                    {{ t('msd.readWrite') }}
-                  </ToggleGroupItem>
-                </ToggleGroup>
-              </div>
-            </div>
-
+          <TabsContent value="images" class="m-0 flex min-h-0 flex-1 flex-col space-y-3 pt-3">
            <!-- Image List -->
            <div class="flex-1 min-h-0 flex flex-col space-y-2 min-w-0">
-              <div class="shrink-0 flex items-center justify-between">
+              <div class="flex shrink-0 flex-wrap items-center justify-between gap-2">
                <h4 class="text-sm font-medium">{{ t('msd.imageList') }}</h4>
-                <Button variant="ghost" size="icon" class="h-7 w-7" @click="loadImages">
-                  <RefreshCw class="h-3.5 w-3.5" :class="{ 'animate-spin': loadingImages }" />
-                </Button>
+                <div class="flex flex-wrap items-center justify-end gap-1.5">
+                  <label>
+                    <input
+                      type="file"
+                      class="hidden"
+                      accept=".iso,.img"
+                      :disabled="uploading"
+                      @change="handleImageUpload"
+                    />
+                    <Button variant="outline" size="sm" as="span" class="h-8 cursor-pointer px-2.5 text-xs">
+                      <Upload class="mr-1.5 h-3.5 w-3.5" />
+                      {{ t('msd.uploadImage') }}
+                    </Button>
+                  </label>
+                  <Button
+                    variant="outline"
+                    size="sm"
+                    class="h-8 px-2.5 text-xs"
+                    @click="showUrlDialog = true"
+                  >
+                    <Globe class="mr-1.5 h-3.5 w-3.5" />
+                    {{ t('msd.downloadFromUrl') }}
+                  </Button>
+                  <Button variant="ghost" size="icon" class="h-8 w-8" @click="loadImages">
+                    <RefreshCw class="h-3.5 w-3.5" :class="{ 'animate-spin': loadingImages }" />
+                  </Button>
+                </div>
              </div>
+              <Progress v-if="uploading" :model-value="uploadProgress" class="h-1 shrink-0" />

              <div v-if="images.length === 0" class="shrink-0 text-center py-6 text-muted-foreground text-sm">
                {{ t('msd.noImages') }}
@@ -717,16 +792,17 @@ onUnmounted(() => {
                  <div
                    v-for="image in images"
                    :key="image.id"
-                    class="p-3 rounded-lg border transition-colors"
+                    class="rounded-md border p-2.5 transition-colors"
                    :class="[
-                      msdConnected && systemStore.msd?.imageId === image.id
-                        ? 'border-primary bg-primary/5'
-                        : 'hover:bg-accent/50'
+                      mountedImage(image.id)
+                        ? 'border-primary/40 bg-muted/50'
+                        : 'border-border bg-background hover:bg-muted/40'
                    ]"
                  >
-                    <div class="flex items-start justify-between gap-2">
-                      <div class="flex items-start gap-2 w-0 flex-1">
-                        <Disc class="h-4 w-4 text-muted-foreground shrink-0 mt-0.5" />
+                    <div class="flex flex-col gap-2 sm:flex-row sm:items-center sm:justify-between">
+                      <div class="flex min-w-0 flex-1 items-start gap-2">
+                        <span v-if="mountedImage(image.id)" class="mt-1.5 h-2 w-2 shrink-0 rounded-full bg-primary" />
+                        <Disc v-else class="mt-0.5 h-4 w-4 shrink-0 text-muted-foreground" />
                        <div class="w-0 flex-1">
                          <Tooltip>
                            <TooltipTrigger as-child>
@@ -755,22 +831,25 @@ onUnmounted(() => {
                          </div>
                        </div>
                      </div>
-                      <div class="flex items-center gap-1.5 shrink-0">
-                        <template v-if="msdConnected && systemStore.msd?.imageId === image.id">
-                          <Badge variant="default" class="text-xs h-7 px-2">
-                            <span class="relative flex h-1.5 w-1.5 mr-1.5">
-                              <span class="animate-ping absolute inline-flex h-full w-full rounded-full bg-white opacity-75"></span>
-                              <span class="relative inline-flex rounded-full h-1.5 w-1.5 bg-white"></span>
-                            </span>
-                            {{ t('common.connected') }}
-                          </Badge>
+                      <div class="flex shrink-0 items-center justify-end gap-1.5">
+                        <template v-if="mountedImage(image.id)">
+                          <Button
+                            variant="outline"
+                            size="sm"
+                            class="h-8 text-xs"
+                            :disabled="operationInProgress"
+                            @click="unmountImageById(image.id)"
+                          >
+                            <Unlink class="h-3.5 w-3.5 mr-1" />
+                            {{ t('msd.disconnect') }}
+                          </Button>
                        </template>
                        <template v-else>
                          <Button
                            variant="default"
                            size="sm"
-                            class="h-7 text-xs"
-                            :disabled="operationInProgress"
+                            class="h-8 text-xs"
+                            :disabled="operationInProgress || mediaSlotsFull"
                            @click="connectImage(image)"
                          >
                            <Link v-if="!connecting" class="h-3.5 w-3.5 mr-1" />
@@ -781,8 +860,8 @@ onUnmounted(() => {
                        <Button
                          variant="ghost"
                          size="icon"
-                          class="h-7 w-7 text-destructive hover:text-destructive"
-                          :disabled="operationInProgress || (msdConnected && systemStore.msd?.imageId === image.id)"
+                          class="h-8 w-8 text-muted-foreground hover:bg-destructive/10 hover:text-destructive"
+                          :disabled="operationInProgress || !!mountedImage(image.id)"
                          @click="confirmDelete('image', image.id, image.name)"
                        >
                          <Trash2 class="h-3.5 w-3.5" />
@@ -794,15 +873,15 @@ onUnmounted(() => {
              </div>

              <!-- System Storage Footer -->
-              <div v-if="systemStore.diskSpace" class="shrink-0 pt-2 border-t mt-2">
-                <p class="text-[11px] text-muted-foreground text-center">
+              <div v-if="systemStore.diskSpace" class="mt-2 shrink-0 border-t pt-2">
+                <p class="text-right text-[11px] text-muted-foreground">
                  {{ t('msd.systemAvailable') }}: {{ formatBytes(systemStore.diskSpace.available) }}
                </p>
              </div>
            </div>
          </TabsContent>

-          <TabsContent value="drive" class="flex-1 min-h-0 m-0 flex flex-col space-y-4">
+          <TabsContent value="drive" class="m-0 flex min-h-0 flex-1 flex-col space-y-4 pt-3">
            <template v-if="!driveInitialized">
              <div class="shrink-0 text-center py-8 space-y-4">
                <HardDrive class="h-10 w-10 mx-auto text-muted-foreground" />
@@ -816,8 +895,8 @@ onUnmounted(() => {
            <template v-else>
              <!-- Drive Info Card -->
              <div
-                class="shrink-0 p-3 rounded-lg border space-y-3"
-                :class="msdConnected && msdMode === 'drive'
+                class="shrink-0 space-y-3 rounded-md border p-3"
+                :class="driveConnectedToTarget
                  ? 'border-primary bg-primary/5'
                  : driveError
                    ? 'border-destructive/40 bg-destructive/5'
@@ -854,28 +933,39 @@ onUnmounted(() => {
                      <Button
                        variant="outline"
                        size="sm"
-                        class="h-7 text-xs"
+                        class="h-8 text-xs"
                        :disabled="operationInProgress"
                        @click="initializeDrive"
                      >
                        {{ t('msd.reinitializeDrive') }}
                      </Button>
                    </template>
-                    <template v-else-if="msdConnected && msdMode === 'drive'">
-                      <Badge variant="default" class="text-xs h-7 px-2">
+                    <template v-else-if="driveConnectedToTarget">
+                      <Badge variant="default" class="h-8 px-2 text-xs">
                        <span class="relative flex h-1.5 w-1.5 mr-1.5">
-                          <span class="animate-ping absolute inline-flex h-full w-full rounded-full bg-white opacity-75"></span>
-                          <span class="relative inline-flex rounded-full h-1.5 w-1.5 bg-white"></span>
+                          <span class="absolute inline-flex h-full w-full animate-ping rounded-full bg-primary-foreground opacity-75"></span>
+                          <span class="relative inline-flex h-1.5 w-1.5 rounded-full bg-primary-foreground"></span>
                        </span>
                        {{ t('common.connected') }}
                      </Badge>
+                      <Button
+                        v-if="driveMedia"
+                        variant="outline"
+                        size="sm"
+                        class="h-8 text-xs"
+                        :disabled="operationInProgress"
+                        @click="unmountMedia(driveMedia)"
+                      >
+                        <Unlink class="h-3.5 w-3.5 mr-1" />
+                        {{ t('msd.disconnect') }}
+                      </Button>
                    </template>
                    <template v-else>
                      <Button
                        variant="default"
                        size="sm"
-                        class="h-7 text-xs"
-                        :disabled="operationInProgress"
+                        class="h-8 text-xs"
+                        :disabled="operationInProgress || mediaSlotsFull || !!driveError"
                        @click="connectDrive"
                      >
                        <Link v-if="!connecting" class="h-3.5 w-3.5 mr-1" />
@@ -886,8 +976,8 @@ onUnmounted(() => {
                    <Button
                      variant="ghost"
                      size="icon"
-                      class="h-7 w-7 text-destructive hover:text-destructive"
-                      :disabled="operationInProgress || msdConnected"
+                      class="h-8 w-8 text-muted-foreground hover:bg-destructive/10 hover:text-destructive"
+                      :disabled="operationInProgress || driveConnectedToTarget"
                      @click="showDeleteDriveDialog = true"
                    >
                      <Trash2 class="h-3.5 w-3.5" />
@@ -918,7 +1008,7 @@ onUnmounted(() => {
                      v-if="currentPath !== '/'"
                      variant="ghost"
                      size="icon"
-                      class="h-7 w-7 shrink-0"
+                      class="h-8 w-8 shrink-0"
                      :disabled="driveConnectedToTarget"
                      @click="navigateUp"
                    >
@@ -951,7 +1041,7 @@ onUnmounted(() => {
                            variant="ghost"
                            size="icon"
                            as="span"
-                            class="h-7 w-7"
+                            class="h-8 w-8"
                            :class="driveConnectedToTarget ? 'cursor-not-allowed opacity-40' : 'cursor-pointer'"
                          >
                            <Upload class="h-3.5 w-3.5" />
@@ -968,7 +1058,7 @@ onUnmounted(() => {
                        <Button
                          variant="ghost"
                          size="icon"
-                          class="h-7 w-7"
+                          class="h-8 w-8"
                          :disabled="driveConnectedToTarget"
                          @click="showNewFolderDialog = true"
                        >
@@ -982,7 +1072,7 @@ onUnmounted(() => {
                    <Button
                      variant="ghost"
                      size="icon"
-                      class="h-7 w-7"
+                      class="h-8 w-8"
                      :disabled="driveConnectedToTarget"
                      @click="loadDriveFiles"
                    >
@@ -1014,7 +1104,7 @@ onUnmounted(() => {
                    <div
                      v-for="file in driveFiles"
                      :key="file.path"
-                      class="flex items-center justify-between p-2 rounded-lg hover:bg-accent/50 transition-colors"
+                      class="flex items-center justify-between rounded-md p-2 transition-colors hover:bg-accent/50"
                    >
                      <div
                        class="flex items-center gap-2 cursor-pointer flex-1 min-w-0"
@@ -1041,7 +1131,7 @@ onUnmounted(() => {
                          v-if="!file.is_dir"
                          variant="ghost"
                          size="icon"
-                          class="h-7 w-7"
+                          class="h-8 w-8"
                          as="a"
                          :href="msdApi.downloadDriveFile(file.path)"
                          download
@@ -1052,7 +1142,7 @@ onUnmounted(() => {
                        <Button
                          variant="ghost"
                          size="icon"
-                          class="h-7 w-7 text-destructive"
+                          class="h-8 w-8 text-muted-foreground hover:bg-destructive/10 hover:text-destructive"
                          :disabled="driveConnectedToTarget"
                          @click="confirmDelete('file', file.path, file.name)"
                        >
@@ -1177,6 +1267,65 @@ onUnmounted(() => {
    </DialogContent>
  </Dialog>

+  <!-- Image Mount Options Dialog -->
+  <Dialog v-model:open="showMountOptionsDialog">
+    <DialogContent class="max-w-md">
+      <DialogHeader>
+        <DialogTitle>{{ t('msd.mountImage') }}</DialogTitle>
+        <DialogDescription>
+          {{ pendingMountImage?.name }}
+        </DialogDescription>
+      </DialogHeader>
+
+      <div class="space-y-4 py-2">
+        <div class="space-y-2">
+          <Label>{{ t('msd.storageMode') }}</Label>
+          <ToggleGroup
+            :model-value="mountMode"
+            type="single"
+            size="sm"
+            :class="segmentedGroupClass"
+            @update:model-value="updateMountMode"
+          >
+            <ToggleGroupItem value="flash" :class="segmentedItemClass">{{ t('msd.flash') }}</ToggleGroupItem>
+            <ToggleGroupItem value="cdrom" :class="segmentedItemClass">{{ t('msd.cdrom') }}</ToggleGroupItem>
+          </ToggleGroup>
+        </div>
+
+        <div class="space-y-2">
+          <Label>{{ t('msd.accessMode') }}</Label>
+          <ToggleGroup
+            :model-value="accessMode"
+            type="single"
+            size="sm"
+            :class="segmentedGroupClass"
+            @update:model-value="updateAccessMode"
+          >
+            <ToggleGroupItem value="readonly" :class="segmentedItemClass">{{ t('msd.readOnly') }}</ToggleGroupItem>
+            <ToggleGroupItem
+              value="readwrite"
+              :class="segmentedItemClass"
+              :disabled="cdromMode"
+            >
+              {{ t('msd.readWrite') }}
+            </ToggleGroupItem>
+          </ToggleGroup>
+        </div>
+      </div>
+
+      <DialogFooter>
+        <Button variant="outline" @click="showMountOptionsDialog = false" :disabled="connecting">
+          {{ t('common.cancel') }}
+        </Button>
+        <Button @click="confirmImageMount" :disabled="connecting || mediaSlotsFull">
+          <Link v-if="!connecting" class="h-4 w-4 mr-1" />
+          <span v-if="connecting">{{ t('common.connecting') }}...</span>
+          <span v-else>{{ t('msd.connect') }}</span>
+        </Button>
+      </DialogFooter>
+    </DialogContent>
+  </Dialog>
+
  <!-- New Folder Dialog -->
  <Dialog v-model:open="showNewFolderDialog">
    <DialogContent>
@@ -1223,7 +1372,7 @@ onUnmounted(() => {
        </div>

        <!-- Download Progress -->
-        <div v-if="downloadProgress" class="space-y-2 p-3 rounded-lg bg-muted/50">
+        <div v-if="downloadProgress" class="space-y-2 rounded-md bg-muted/50 p-3">
          <div class="flex items-center justify-between text-sm">
            <span class="truncate">{{ downloadProgress.filename }}</span>
            <span class="text-muted-foreground shrink-0 ml-2">
--- a/web/src/components/MsdSheet.vue
+++ b/web/src/components/MsdSheet.vue
@@ -1,610 +0,0 @@
-<script setup lang="ts">
-import { ref, onMounted, computed, watch } from 'vue'
-import { useI18n } from 'vue-i18n'
-import { useSystemStore } from '@/stores/system'
-import { msdApi, type MsdImage, type DriveFile } from '@/api'
-import {
-  Sheet,
-  SheetContent,
-  SheetHeader,
-  SheetTitle,
-  SheetDescription,
-} from '@/components/ui/sheet'
-import { Button } from '@/components/ui/button'
-import { Badge } from '@/components/ui/badge'
-import { Tabs, TabsContent, TabsList, TabsTrigger } from '@/components/ui/tabs'
-import { Progress } from '@/components/ui/progress'
-import { Input } from '@/components/ui/input'
-import { Switch } from '@/components/ui/switch'
-import { Label } from '@/components/ui/label'
-import { Separator } from '@/components/ui/separator'
-import {
-  Dialog,
-  DialogContent,
-  DialogDescription,
-  DialogFooter,
-  DialogHeader,
-  DialogTitle,
-} from '@/components/ui/dialog'
-import {
-  HardDrive,
-  Upload,
-  Trash2,
-  Link,
-  Unlink,
-  Disc,
-  File,
-  Folder,
-  FolderPlus,
-  Download,
-  RefreshCw,
-  ChevronRight,
-  ArrowLeft,
-} from 'lucide-vue-next'
-
-const props = defineProps<{
-  open: boolean
-}>()
-
-const emit = defineEmits<{
-  (e: 'update:open', value: boolean): void
-}>()
-
-const { t } = useI18n()
-const systemStore = useSystemStore()
-
-const activeTab = ref('images')
-
-const images = ref<MsdImage[]>([])
-const loadingImages = ref(false)
-const uploadProgress = ref(0)
-const uploading = ref(false)
-const cdromMode = ref(true)
-const readOnly = ref(true)
-
-const driveFiles = ref<DriveFile[]>([])
-const currentPath = ref('/')
-const loadingDrive = ref(false)
-const driveInfo = ref<{ size: number; used: number; free: number; initialized: boolean } | null>(null)
-const driveInitialized = ref(false)
-const uploadingFile = ref(false)
-const fileUploadProgress = ref(0)
-
-const showDeleteDialog = ref(false)
-const deleteTarget = ref<{ type: 'image' | 'file'; id: string; name: string } | null>(null)
-const showNewFolderDialog = ref(false)
-const newFolderName = ref('')
-
-const msdConnected = computed(() => systemStore.msd?.connected ?? false)
-const msdMode = computed(() => systemStore.msd?.mode ?? 'none')
-
-const breadcrumbs = computed(() => {
-  const parts = currentPath.value.split('/').filter(Boolean)
-  const crumbs = [{ name: '/', path: '/' }]
-  let path = ''
-  for (const part of parts) {
-    path += '/' + part
-    crumbs.push({ name: part, path })
-  }
-  return crumbs
-})
-
-watch(() => props.open, async (isOpen) => {
-  if (isOpen) {
-    await loadData()
-  }
-})
-
-async function loadData() {
-  await systemStore.fetchMsdState()
-  await loadImages()
-  await loadDriveInfo()
-  if (driveInitialized.value) {
-    await loadDriveFiles()
-  }
-}
-
-async function loadImages() {
-  loadingImages.value = true
-  try {
-    images.value = await msdApi.listImages()
-  } catch (e) {
-    console.error('Failed to load images:', e)
-  } finally {
-    loadingImages.value = false
-  }
-}
-
-async function handleImageUpload(e: Event) {
-  const input = e.target as HTMLInputElement
-  const file = input.files?.[0]
-  if (!file) return
-
-  uploading.value = true
-  uploadProgress.value = 0
-
-  try {
-    const image = await msdApi.uploadImage(file, (progress) => {
-      uploadProgress.value = progress
-    })
-    images.value.push(image)
-  } catch (e) {
-    console.error('Failed to upload image:', e)
-  } finally {
-    uploading.value = false
-    uploadProgress.value = 0
-    input.value = ''
-  }
-}
-
-async function connectImage(image: MsdImage) {
-  try {
-    await msdApi.connect('image', image.id, cdromMode.value, readOnly.value)
-    await systemStore.fetchMsdState()
-  } catch (e) {
-    console.error('Failed to connect image:', e)
-  }
-}
-
-async function disconnect() {
-  try {
-    await msdApi.disconnect()
-    await systemStore.fetchMsdState()
-  } catch (e) {
-    console.error('Failed to disconnect:', e)
-  }
-}
-
-function confirmDelete(type: 'image' | 'file', id: string, name: string) {
-  deleteTarget.value = { type, id, name }
-  showDeleteDialog.value = true
-}
-
-async function executeDelete() {
-  if (!deleteTarget.value) return
-
-  try {
-    if (deleteTarget.value.type === 'image') {
-      await msdApi.deleteImage(deleteTarget.value.id)
-      images.value = images.value.filter(i => i.id !== deleteTarget.value!.id)
-    } else {
-      await msdApi.deleteDriveFile(deleteTarget.value.id)
-      await loadDriveFiles()
-    }
-  } catch (e) {
-    console.error('Failed to delete:', e)
-  } finally {
-    showDeleteDialog.value = false
-    deleteTarget.value = null
-  }
-}
-
-async function loadDriveInfo() {
-  try {
-    driveInfo.value = await msdApi.driveInfo()
-    driveInitialized.value = true
-  } catch {
-    driveInitialized.value = false
-  }
-}
-
-async function initializeDrive() {
-  try {
-    await msdApi.initDrive(256)
-    await loadDriveInfo()
-    await loadDriveFiles()
-  } catch (e) {
-    console.error('Failed to initialize drive:', e)
-  }
-}
-
-async function loadDriveFiles() {
-  loadingDrive.value = true
-  try {
-    driveFiles.value = await msdApi.listDriveFiles(currentPath.value)
-  } catch (e) {
-    console.error('Failed to load drive files:', e)
-  } finally {
-    loadingDrive.value = false
-  }
-}
-
-function navigateTo(path: string) {
-  currentPath.value = path
-  loadDriveFiles()
-}
-
-function navigateUp() {
-  const parts = currentPath.value.split('/').filter(Boolean)
-  parts.pop()
-  currentPath.value = '/' + parts.join('/')
-  loadDriveFiles()
-}
-
-async function handleFileUpload(e: Event) {
-  const input = e.target as HTMLInputElement
-  const file = input.files?.[0]
-  if (!file) return
-
-  uploadingFile.value = true
-  fileUploadProgress.value = 0
-
-  try {
-    await msdApi.uploadDriveFile(file, currentPath.value, (progress) => {
-      fileUploadProgress.value = progress
-    })
-    await loadDriveFiles()
-  } catch (e) {
-    console.error('Failed to upload file:', e)
-  } finally {
-    uploadingFile.value = false
-    fileUploadProgress.value = 0
-    input.value = ''
-  }
-}
-
-async function createFolder() {
-  if (!newFolderName.value.trim()) return
-
-  try {
-    const path = currentPath.value === '/'
-      ? '/' + newFolderName.value
-      : currentPath.value + '/' + newFolderName.value
-    await msdApi.createDirectory(path)
-    await loadDriveFiles()
-  } catch (e) {
-    console.error('Failed to create folder:', e)
-  } finally {
-    showNewFolderDialog.value = false
-    newFolderName.value = ''
-  }
-}
-
-async function connectDrive() {
-  try {
-    await msdApi.connect('drive')
-    await systemStore.fetchMsdState()
-  } catch (e) {
-    console.error('Failed to connect drive:', e)
-  }
-}
-
-function formatBytes(bytes: number): string {
-  if (bytes < 1024) return bytes + ' B'
-  if (bytes < 1024 * 1024) return (bytes / 1024).toFixed(1) + ' KB'
-  if (bytes < 1024 * 1024 * 1024) return (bytes / 1024 / 1024).toFixed(1) + ' MB'
-  return (bytes / 1024 / 1024 / 1024).toFixed(1) + ' GB'
-}
-
-onMounted(async () => {
-  if (props.open) {
-    await loadData()
-  }
-})
-</script>
-
-<template>
-  <Sheet :open="open" @update:open="emit('update:open', $event)">
-    <SheetContent side="right" class="w-full sm:max-w-lg overflow-hidden flex flex-col h-[dvh]">
-      <SheetHeader class="shrink-0">
-        <div class="flex items-center justify-between pr-8">
-          <div>
-            <SheetTitle class="flex items-center gap-2">
-              <HardDrive class="h-5 w-5" />
-              {{ t('msd.title') }}
-            </SheetTitle>
-            <SheetDescription class="flex items-center gap-2 mt-1">
-              {{ msdConnected ? t('common.connected') : t('common.disconnected') }}
-              <Badge v-if="msdConnected" variant="secondary" class="text-xs">{{ msdMode }}</Badge>
-            </SheetDescription>
-          </div>
-          <Button v-if="msdConnected" variant="destructive" size="sm" @click="disconnect">
-            <Unlink class="h-4 w-4 mr-1" />
-            {{ t('msd.disconnect') }}
-          </Button>
-        </div>
-      </SheetHeader>
-
-      <Separator class="my-4 shrink-0" />
-
-      <Tabs v-model="activeTab" class="flex-1 flex flex-col min-h-0 overflow-hidden">
-        <TabsList class="w-full grid grid-cols-2 shrink-0">
-          <TabsTrigger value="images">
-            <Disc class="h-4 w-4 mr-1.5" />
-            {{ t('msd.images') }}
-          </TabsTrigger>
-          <TabsTrigger value="drive">
-            <HardDrive class="h-4 w-4 mr-1.5" />
-            {{ t('msd.drive') }}
-          </TabsTrigger>
-        </TabsList>
-
-        <div class="flex-1 min-h-0 mt-4 flex flex-col">
-          <!-- Images Tab -->
-          <TabsContent value="images" class="flex-1 min-h-0 m-0 flex flex-col space-y-4">
-            <!-- Upload Area -->
-            <div class="shrink-0 space-y-3">
-              <label class="block">
-                <input
-                  type="file"
-                  accept=".iso,.img"
-                  class="hidden"
-                  :disabled="uploading"
-                  @change="handleImageUpload"
-                />
-                <div class="flex items-center justify-center h-16 border-2 border-dashed rounded-lg cursor-pointer hover:border-primary transition-colors">
-                  <div class="text-center">
-                    <Upload class="h-5 w-5 mx-auto text-muted-foreground" />
-                    <p class="text-xs text-muted-foreground mt-1">{{ t('msd.uploadImage') }} (ISO/IMG)</p>
-                  </div>
-                </div>
-              </label>
-              <Progress v-if="uploading" :model-value="uploadProgress" class="h-1" />
-            </div>
-
-            <!-- Options -->
-            <div class="shrink-0 flex items-center gap-4 p-3 rounded-lg bg-muted/50">
-              <div class="flex items-center gap-2">
-                <Switch id="cdrom" v-model:checked="cdromMode" />
-                <Label for="cdrom" class="text-xs">{{ t('msd.cdromMode') }}</Label>
-              </div>
-              <div class="flex items-center gap-2">
-                <Switch id="readonly" v-model:checked="readOnly" />
-                <Label for="readonly" class="text-xs">{{ t('msd.readOnly') }}</Label>
-              </div>
-            </div>
-
-            <!-- Image List -->
-            <div class="flex-1 min-h-0 flex flex-col space-y-2">
-              <div class="shrink-0 flex items-center justify-between">
-                <h4 class="text-sm font-medium">{{ t('msd.imageList') }}</h4>
-                <Button variant="ghost" size="icon" class="h-7 w-7" @click="loadImages">
-                  <RefreshCw class="h-3.5 w-3.5" :class="{ 'animate-spin': loadingImages }" />
-                </Button>
-              </div>
-
-              <div v-if="images.length === 0" class="shrink-0 text-center py-6 text-muted-foreground text-sm">
-                {{ t('msd.noImages') }}
-              </div>
-
-              <ScrollArea v-else class="flex-1 min-h-0 pr-4">
-                <div class="space-y-1.5">
-                  <div
-                    v-for="image in images"
-                    :key="image.id"
-                    class="flex items-center justify-between p-2.5 rounded-lg border hover:bg-accent/50 transition-colors"
-                  >
-                    <div class="flex items-center gap-2.5 min-w-0 flex-1">
-                      <Disc class="h-4 w-4 text-muted-foreground shrink-0" />
-                      <div class="min-w-0">
-                        <p class="text-sm font-medium truncate">{{ image.name }}</p>
-                        <p class="text-xs text-muted-foreground">
-                          {{ formatBytes(image.size) }}
-                        </p>
-                      </div>
-                    </div>
-                    <div class="flex items-center gap-1 shrink-0">
-                      <Button
-                        v-if="!msdConnected || systemStore.msd?.imageId !== image.id"
-                        variant="outline"
-                        size="sm"
-                        class="h-7 text-xs"
-                        @click="connectImage(image)"
-                      >
-                        <Link class="h-3.5 w-3.5 mr-1" />
-                        {{ t('msd.connect') }}
-                      </Button>
-                      <Badge v-else variant="default" class="text-xs">{{ t('common.connected') }}</Badge>
-                      <Button
-                        variant="ghost"
-                        size="icon"
-                        class="h-7 w-7 text-destructive"
-                        @click="confirmDelete('image', image.id, image.name)"
-                      >
-                        <Trash2 class="h-3.5 w-3.5" />
-                      </Button>
-                    </div>
-                  </div>
-                </div>
-              </ScrollArea>
-            </div>
-          </TabsContent>
-
-          <!-- Drive Tab -->
-          <TabsContent value="drive" class="flex-1 min-h-0 m-0 flex flex-col space-y-4">
-            <template v-if="!driveInitialized">
-              <div class="shrink-0 text-center py-8 space-y-4">
-                <HardDrive class="h-10 w-10 mx-auto text-muted-foreground" />
-                <p class="text-sm text-muted-foreground">{{ t('msd.driveNotInitialized') }}</p>
-                <Button size="sm" @click="initializeDrive">
-                  {{ t('msd.initializeDrive') }}
-                </Button>
-              </div>
-            </template>
-
-            <template v-else>
-              <!-- Drive Info -->
-              <div class="shrink-0 p-3 rounded-lg bg-muted/50 space-y-2">
-                <div class="flex items-center justify-between">
-                  <div class="space-y-0.5">
-                    <p class="text-xs text-muted-foreground">{{ t('msd.driveSize') }}: {{ (driveInfo?.size || 0) / 1024 / 1024 }}MB</p>
-                    <p class="text-xs text-muted-foreground">
-                      {{ formatBytes(driveInfo?.used || 0) }} / {{ formatBytes(driveInfo?.size || 0) }}
-                    </p>
-                  </div>
-                  <Button
-                    v-if="!msdConnected || msdMode !== 'drive'"
-                    variant="outline"
-                    size="sm"
-                    class="h-7 text-xs"
-                    @click="connectDrive"
-                  >
-                    <Link class="h-3.5 w-3.5 mr-1" />
-                    {{ t('msd.connect') }}
-                  </Button>
-                  <Badge v-else class="text-xs">{{ t('common.connected') }}</Badge>
-                </div>
-                <Progress
-                  v-if="driveInfo"
-                  :model-value="driveInfo.size > 0 ? (driveInfo.used / driveInfo.size) * 100 : 0"
-                  class="h-1"
-                />
-              </div>
-
-              <!-- File Browser -->
-              <div class="flex-1 min-h-0 flex flex-col space-y-2">
-                <!-- Toolbar -->
-                <div class="shrink-0 flex items-center justify-between gap-2">
-                  <div class="flex items-center gap-1 min-w-0 flex-1">
-                    <Button
-                      v-if="currentPath !== '/'"
-                      variant="ghost"
-                      size="icon"
-                      class="h-7 w-7 shrink-0"
-                      @click="navigateUp"
-                    >
-                      <ArrowLeft class="h-3.5 w-3.5" />
-                    </Button>
-                    <nav class="flex items-center text-xs min-w-0 overflow-hidden">
-                      <template v-for="(crumb, index) in breadcrumbs" :key="crumb.path">
-                        <ChevronRight v-if="index > 0" class="h-3 w-3 text-muted-foreground mx-0.5 shrink-0" />
-                        <button
-                          class="hover:text-primary transition-colors truncate"
-                          :class="index === breadcrumbs.length - 1 ? 'font-medium' : 'text-muted-foreground'"
-                          @click="navigateTo(crumb.path)"
-                        >
-                          {{ crumb.name }}
-                        </button>
-                      </template>
-                    </nav>
-                  </div>
-                  <div class="shrink-0 flex items-center gap-1 shrink-0">
-                    <label>
-                      <input type="file" class="hidden" :disabled="uploadingFile" @change="handleFileUpload" />
-                      <Button variant="ghost" size="icon" as="span" class="h-7 w-7 cursor-pointer">
-                        <Upload class="h-3.5 w-3.5" />
-                      </Button>
-                    </label>
-                    <Button variant="ghost" size="icon" class="h-7 w-7" @click="showNewFolderDialog = true">
-                      <FolderPlus class="h-3.5 w-3.5" />
-                    </Button>
-                    <Button variant="ghost" size="icon" class="h-7 w-7" @click="loadDriveFiles">
-                      <RefreshCw class="h-3.5 w-3.5" :class="{ 'animate-spin': loadingDrive }" />
-                    </Button>
-                  </div>
-                </div>
-
-                <Progress v-if="uploadingFile" :model-value="fileUploadProgress" class="h-1 shrink-0" />
-
-                <!-- File List -->
-                <div v-if="driveFiles.length === 0" class="shrink-0 text-center py-6 text-muted-foreground text-sm">
-                  {{ t('msd.emptyFolder') }}
-                </div>
-
-                <ScrollArea v-else class="flex-1 min-h-0 pr-4">
-                  <div class="space-y-1">
-                    <div
-                      v-for="file in driveFiles"
-                      :key="file.path"
-                      class="flex items-center justify-between p-2 rounded-lg hover:bg-accent/50 transition-colors"
-                    >
-                      <div
-                        class="flex items-center gap-2 cursor-pointer flex-1 min-w-0"
-                        @click="file.is_dir && navigateTo(file.path)"
-                      >
-                        <Folder v-if="file.is_dir" class="h-4 w-4 text-blue-500 shrink-0" />
-                        <File v-else class="h-4 w-4 text-muted-foreground shrink-0" />
-                        <div class="min-w-0">
-                          <p class="text-sm font-medium truncate">{{ file.name }}</p>
-                          <p v-if="!file.is_dir" class="text-xs text-muted-foreground">
-                            {{ formatBytes(file.size) }}
-                          </p>
-                        </div>
-                      </div>
-                      <div class="flex items-center gap-0.5 shrink-0">
-                        <Button
-                          v-if="!file.is_dir"
-                          variant="ghost"
-                          size="icon"
-                          class="h-7 w-7"
-                          as="a"
-                          :href="msdApi.downloadDriveFile(file.path)"
-                          download
-                        >
-                          <Download class="h-3.5 w-3.5" />
-                        </Button>
-                        <Button
-                          variant="ghost"
-                          size="icon"
-                          class="h-7 w-7 text-destructive"
-                          @click="confirmDelete('file', file.path, file.name)"
-                        >
-                          <Trash2 class="h-3.5 w-3.5" />
-                        </Button>
-                      </div>
-                    </div>
-                  </div>
-                </ScrollArea>
-              </div>
-            </template>
-          </TabsContent>
-        </div>
-      </Tabs>
-    </SheetContent>
-  </Sheet>
-
-  <!-- Delete Dialog -->
-  <Dialog v-model:open="showDeleteDialog">
-    <DialogContent>
-      <DialogHeader>
-        <DialogTitle>{{ t('common.confirm') }}</DialogTitle>
-        <DialogDescription>
-          {{ t('msd.confirmDelete', { name: deleteTarget?.name }) }}
-        </DialogDescription>
-      </DialogHeader>
-      <DialogFooter>
-        <Button variant="outline" @click="showDeleteDialog = false">{{ t('common.cancel') }}</Button>
-        <Button variant="destructive" @click="executeDelete">{{ t('common.delete') }}</Button>
-      </DialogFooter>
-    </DialogContent>
-  </Dialog>
-
-  <!-- New Folder Dialog -->
-  <Dialog v-model:open="showNewFolderDialog">
-    <DialogContent>
-      <DialogHeader>
-        <DialogTitle>{{ t('msd.createFolder') }}</DialogTitle>
-      </DialogHeader>
-      <Input v-model="newFolderName" :placeholder="t('msd.folderName')" @keyup.enter="createFolder" />
-      <DialogFooter>
-        <Button variant="outline" @click="showNewFolderDialog = false">{{ t('common.cancel') }}</Button>
-        <Button @click="createFolder">{{ t('common.confirm') }}</Button>
-      </DialogFooter>
-    </DialogContent>
-  </Dialog>
-</template>
-
-<style scoped>
-.custom-scrollbar::-webkit-scrollbar {
-  width: 6px;
-}
-
-.custom-scrollbar::-webkit-scrollbar-track {
-  background: transparent;
-}
-
-.custom-scrollbar::-webkit-scrollbar-thumb {
-  background: hsl(var(--muted-foreground) / 0.3);
-  border-radius: 10px;
-}
-
-.custom-scrollbar::-webkit-scrollbar-thumb:hover {
-  background: hsl(var(--muted-foreground) / 0.5);
-}
-
-/* For Firefox */
-.custom-scrollbar {
-  scrollbar-width: thin;
-  scrollbar-color: hsl(var(--muted-foreground) / 0.3) transparent;
-}
-</style>
--- a/web/src/i18n/en-US.ts
+++ b/web/src/i18n/en-US.ts
@@ -427,15 +427,12 @@ export default {
  msd: {
    title: 'Virtual Media',
    images: 'ISO/IMG Mount',
-    imagesDesc: 'Mount ISO/IMG images to target device',
    drive: 'Virtual USB',
-    driveDesc: 'Transfer files to target device like a USB drive, supports Ventoy boot',
    imageList: 'Image List',
    uploadImage: 'Upload Image',
    noImages: 'No images',
    connect: 'Connect',
    disconnect: 'Disconnect',
-    connectedTo: 'Connected to',
    cdrom: 'CD-ROM',
    flash: 'Flash',
    storageMode: 'Storage Mode',
@@ -452,14 +449,10 @@ export default {
    freeSpace: 'Free',
    deleteDrive: 'Delete Drive',
    confirmDeleteDrive: 'Are you sure you want to delete the virtual drive? All files will be erased.',
-    driveDeleted: 'Drive deleted',
    systemAvailable: 'System Available',
    emptyFolder: 'Empty folder',
    confirmDelete: 'Are you sure you want to delete "{name}"?',
    folderName: 'Folder name',
-    uploadImageHint: 'Click to upload ISO/IMG',
-    imageMounted: 'Image {name} mounted',
-    imageUnmounted: 'Image unmounted',
    downloadFromUrl: 'Download from URL',
    downloadFromUrlDesc: 'Enter the URL of an image file (ISO/IMG supported)',
    url: 'URL',
@@ -467,31 +460,28 @@ export default {
    filenameAutoDetect: 'Auto-detect from URL',
    download: 'Download',
    downloadComplete: 'Download complete',
-    downloadFailed: 'Download failed',
    largeFileWarning: '>2.2GB',
    largeFileTooltip: 'File is larger than 2.2GB, please use Flash mode to mount',
-    error: 'MSD Error',
-    errorDesc: '{reason}',
-    recovered: 'MSD Recovered',
-    recoveredDesc: 'MSD operation completed successfully',
    operationInProgress: 'Operation in progress, please wait',
-    driveConnected: 'Virtual USB drive connected',
-    imageConnected: 'Image {name} connected',
    selectDriveSize: 'Select virtual drive size',
-    customSize: 'Custom size',
    driveSpaceUnknown: 'Unable to read available space for the MSD directory filesystem',
    driveSpaceUnavailable: 'Not enough space on the MSD directory filesystem to create a virtual drive',
    driveSpaceTooSmall: 'Available space is less than {min} MB; cannot create a virtual drive',
    driveCreateFailed: 'Failed to create virtual drive. Check available space for the MSD directory',
-    driveCreated: 'Virtual drive created ({size} MB)',
-    fileDeleted: 'File deleted',
-    imageDeleted: 'Image deleted',
    driveConnectedBlocked: 'Disconnect the drive before editing files',
    driveConnectedFilesHidden: 'Drive is connected to target machine — file list unavailable',
    uploadFailed: 'File upload failed',
    driveUnreadable: 'Format unsupported',
    driveUnreadableTooltip: 'Unable to parse the exFAT filesystem. It may have been formatted with an unsupported format.',
    reinitializeDrive: 'Re-initialize',
+    diskMode: 'Drive Mode',
+    singleDiskMode: 'Single',
+    multiDiskMode: 'Multi',
+    diskModeHint: 'Single drive provides 1 media slot; multi drive provides 8. Switching modes clears mounted media and re-enumerates USB.',
+    mountImage: 'Mount Image',
+    mediaCount: 'Media {count}/{capacity}',
+    mediaSlotsFull: 'Media slots are full; no more media can be mounted',
+    reenumerating: 'USB is re-enumerating',
  },
  settings: {
    title: 'Settings',
@@ -949,6 +939,7 @@ export default {
    msdStandby: 'Idle',
    msdImageMode: 'Image Mode',
    msdDriveMode: 'Virtual USB',
+    msdMultiMode: 'Virtual Media: {count} mounted',
    msdMountType: 'Mount Type',
    msdCurrentImage: 'Current Image',
    msdNoImage: 'None',
--- a/web/src/i18n/zh-CN.ts
+++ b/web/src/i18n/zh-CN.ts
@@ -426,15 +426,12 @@ export default {
  msd: {
    title: '虚拟媒体',
    images: 'ISO/IMG 挂载',
-    imagesDesc: '将 ISO/IMG 镜像挂载到目标设备',
    drive: '虚拟U盘',
-    driveDesc: '像U盘一样向目标设备传输文件，支持 Ventoy 引导',
    imageList: '镜像列表',
    uploadImage: '上传镜像',
    noImages: '暂无镜像',
    connect: '连接',
    disconnect: '断开',
-    connectedTo: '已连接至',
    cdrom: 'CD-ROM',
    flash: 'Flash',
    storageMode: '存储模式',
@@ -451,14 +448,10 @@ export default {
    freeSpace: '剩余',
    deleteDrive: '删除驱动器',
    confirmDeleteDrive: '确定要删除虚拟驱动器吗？所有文件将被清除。',
-    driveDeleted: '驱动器已删除',
    systemAvailable: '系统可用',
    emptyFolder: '空文件夹',
    confirmDelete: '确定要删除 "{name}" 吗？',
    folderName: '文件夹名称',
-    uploadImageHint: '点击上传 ISO/IMG 镜像',
-    imageMounted: '镜像 {name} 已挂载',
-    imageUnmounted: '镜像已卸载',
    downloadFromUrl: '从 URL 下载',
    downloadFromUrlDesc: '输入镜像文件的 URL 地址，支持 ISO/IMG 格式',
    url: 'URL 地址',
@@ -466,31 +459,28 @@ export default {
    filenameAutoDetect: '自动从 URL 获取',
    download: '下载',
    downloadComplete: '下载完成',
-    downloadFailed: '下载失败',
    largeFileWarning: '>2.2GB',
    largeFileTooltip: '文件大于 2.2GB，请使用 Flash 模式挂载',
-    error: 'MSD 错误',
-    errorDesc: '{reason}',
-    recovered: 'MSD 已恢复',
-    recoveredDesc: 'MSD 设备已恢复正常',
    operationInProgress: '操作进行中，请稍候',
-    driveConnected: '虚拟U盘已连接',
-    imageConnected: '镜像 {name} 已连接',
    selectDriveSize: '选择虚拟驱动器大小',
-    customSize: '自定义大小',
    driveSpaceUnknown: '无法读取 MSD 目录所在储存空间的剩余可用空间',
    driveSpaceUnavailable: 'MSD 目录所在储存空间不足，无法创建虚拟U盘',
    driveSpaceTooSmall: '剩余可用空间不足 {min} MB，无法创建虚拟U盘',
    driveCreateFailed: '虚拟U盘创建失败，请检查 MSD 目录剩余空间',
-    driveCreated: '虚拟驱动器已创建 ({size} MB)',
-    fileDeleted: '文件已删除',
-    imageDeleted: '镜像已删除',
    driveConnectedBlocked: '请先断开连接，再操作文件',
    driveConnectedFilesHidden: '已连接到被控机，文件列表暂不可用',
    uploadFailed: '文件上传失败',
    driveUnreadable: '格式不支持',
    driveUnreadableTooltip: '无法解析 exFAT 文件系统，可能已被格式化为不支持的格式。',
    reinitializeDrive: '重新初始化',
+    diskMode: '驱动器模式',
+    singleDiskMode: '单驱动器',
+    multiDiskMode: '多驱动器',
+    diskModeHint: '单驱动器提供 1 个介质槽位，多驱动器提供 8 个；切换模式会清空已挂载介质并重新枚举 USB。',
+    mountImage: '挂载镜像',
+    mediaCount: '介质 {count}/{capacity}',
+    mediaSlotsFull: '介质槽已满，无法挂载更多介质',
+    reenumerating: 'USB 正在重新枚举',
  },
  settings: {
    title: '系统设置',
@@ -948,6 +938,7 @@ export default {
    msdStandby: '空闲',
    msdImageMode: '镜像模式',
    msdDriveMode: '虚拟U盘',
+    msdMultiMode: '多媒体：{count} 个已挂载',
    msdMountType: '挂载类型',
    msdCurrentImage: '当前镜像',
    msdNoImage: '无',
--- a/web/src/stores/system.ts
+++ b/web/src/stores/system.ts
@@ -1,6 +1,6 @@
 import { defineStore } from 'pinia'
 import { ref } from 'vue'
-import { systemApi, streamApi, hidApi, atxApi, msdApi, type DeviceInfo, type PlatformCapabilities } from '@/api'
+import { systemApi, streamApi, hidApi, atxApi, msdApi, type DeviceInfo, type DiskMode, type MountedMedia, type PlatformCapabilities } from '@/api'

 interface SystemCapabilities {
  video: { available: boolean; backend?: string; reason?: string }
@@ -56,9 +56,11 @@ interface AtxState {

 interface MsdState {
  available: boolean
-  connected: boolean
-  mode: 'none' | 'image' | 'drive'
-  imageId: string | null
+  diskMode: DiskMode
+  slotCapacity: number
+  mountedCount: number
+  mountedMedia: MountedMedia[]
+  usbReenumerating: boolean
  error: string | null
 }

@@ -111,9 +113,18 @@ export interface HidDeviceInfo {

 export interface MsdDeviceInfo {
  available: boolean
-  mode: string
-  connected: boolean
-  image_id: string | null
+  disk_mode: DiskMode
+  slot_capacity: number
+  mounted_count: number
+  mounted_media: Array<{
+    id: string
+    kind: 'drive' | 'image'
+    name: string
+    cdrom: boolean
+    read_only: boolean
+    size: number
+  }>
+  usb_reenumerating: boolean
  error: string | null
 }

@@ -250,9 +261,11 @@ export const useSystemStore = defineStore('system', () => {
      const result = await msdApi.status()
      msd.value = {
        available: result.available,
-        connected: result.state.connected,
-        mode: result.state.mode,
-        imageId: result.state.current_image?.id ?? null,
+        diskMode: result.state.disk_mode,
+        slotCapacity: result.state.slot_capacity,
+        mountedCount: result.state.mounted_count,
+        mountedMedia: result.state.mounted_media,
+        usbReenumerating: result.state.usb_reenumerating,
        error: null,
      }
      return result
@@ -361,9 +374,11 @@ export const useSystemStore = defineStore('system', () => {
    if (data.msd) {
      msd.value = {
        available: data.msd.available,
-        connected: data.msd.connected,
-        mode: data.msd.mode as 'none' | 'image' | 'drive',
-        imageId: data.msd.image_id,
+        diskMode: data.msd.disk_mode,
+        slotCapacity: data.msd.slot_capacity,
+        mountedCount: data.msd.mounted_count,
+        mountedMedia: data.msd.mounted_media,
+        usbReenumerating: data.msd.usb_reenumerating,
        error: data.msd.error,
      }
    } else {
--- a/web/src/views/ConsoleView.vue
+++ b/web/src/views/ConsoleView.vue
@@ -481,17 +481,15 @@ const msdStatus = computed<'connected' | 'connecting' | 'disconnected' | 'error'
  const msd = systemStore.msd
  if (!msd?.available) return 'disconnected'
  if (msd.error) return 'error'
-  if (msd.connected) return 'connected'
+  if (msd.mountedCount > 0) return 'connected'
  return 'disconnected'
 })

 const msdQuickInfo = computed(() => {
  const msd = systemStore.msd
  if (!msd?.available) return ''
-  if (msd.mode === 'none') return t('statusCard.msdStandby')
-  if (msd.mode === 'image') return t('statusCard.msdImageMode')
-  if (msd.mode === 'drive') return t('statusCard.msdDriveMode')
-  return t('common.unknown')
+  if (msd.mountedCount === 0) return t('statusCard.msdStandby')
+  return `${msd.diskMode === 'single' ? t('msd.singleDiskMode') : t('msd.multiDiskMode')} · ${t('msd.mediaCount', { count: msd.mountedCount, capacity: msd.slotCapacity })}`
 })

 const msdErrorMessage = computed(() => {
@@ -504,7 +502,7 @@ const msdDetails = computed<StatusDetail[]>(() => {

  const details: StatusDetail[] = []

-  if (msd.mode === 'none') {
+  if (msd.mountedCount === 0) {
    details.push({
      label: t('statusCard.msdStatus'),
      value: t('statusCard.msdStandby'),
@@ -518,22 +516,22 @@ const msdDetails = computed<StatusDetail[]>(() => {
    })
  }

-  const modeDisplay = msd.mode === 'none'
-    ? '-'
-    : msd.mode === 'image'
-      ? t('statusCard.msdImageMode')
-      : t('statusCard.msdDriveMode')
  details.push({
    label: t('statusCard.currentMode'),
-    value: modeDisplay,
-    status: msd.mode !== 'none' ? 'ok' : undefined
+    value: msd.diskMode === 'single' ? t('msd.singleDiskMode') : t('msd.multiDiskMode'),
+    status: msd.mountedCount > 0 ? 'ok' : undefined
  })

-  if (msd.mode === 'image') {
-    details.push({
-      label: t('statusCard.msdCurrentImage'),
-      value: msd.imageId || t('statusCard.msdNoImage')
-    })
+  if (msd.mountedMedia.length > 0) {
+    for (const media of msd.mountedMedia) {
+      details.push({
+        label: media.kind === 'drive' ? t('statusCard.msdDriveMode') : t('statusCard.msdCurrentImage'),
+        value: media.kind === 'drive'
+          ? t('statusCard.msdDriveMode')
+          : `${media.name || media.id || t('statusCard.msdNoImage')} (${media.cdrom ? t('msd.cdrom') : t('msd.flash')})`,
+        status: 'ok'
+      })
+    }
  }

  return details