Added failed umount force retry

main.py

@@ -38,6 +38,7 @@ class AppState:
     diskEventQueue: Queue[DiskEvent] = Queue()
     diskState: DiskState = "disconnected"
     config = Config()
+    failedUmount: bool = False
 
 
 def saveConfig(config: Config, path: Path) -> None:
@@ -174,6 +175,7 @@ def mountDisk(state: AppState) -> None:
 
 
 def unmountDisk(state: AppState) -> None:
+    if not state.failedUmount:
         try:
             subprocess.run(
                 [
@@ -184,9 +186,20 @@ def unmountDisk(state: AppState) -> None:
             )
             print("unmounting disk")
         except subprocess.CalledProcessError:
-        pass
+            state.failedUmount = True
         else:
             state.diskState = "disconnected"
+    else:
+        subprocess.run(
+            [
+                "umount",
+                "-f",
+                f"/mnt/{state.config.diskSerial}",
+            ],
+            check=False,
+        )
+        state.diskState = "disconnected"
+        state.failedUmount = False
 
 
 def main() -> None: