I have a 10TB drive that was working fine until I restarted the server and ever since it gives me a fail error when I try to mount it. I deleted the partition and reformatted, refreshed in the unassigned device panel and still gives me the error. I can plug it into my Linux laptop and it works so I’m not sure what to do to fix it.

Attach Diagnostics ZIP to your NEXT post in this thread.

Sorry, new to unraid and this forum. Attached is the diagnostic zip.

thomson-unraid-diagnostics-20260416-2238.zip

Post a screenshot of MAIN - Unassigned Devices

Apr 16 21:48:28 Thomson-Unraid unassigned.devices: Error: Device '/dev/sdj1' mount point 'WDC_WD10_0EAGZ-00CRLB0' - name is reserved, used in the array or a pool, or by an unassigned device.

Apr 16 21:48:28 Thomson-Unraid unassigned.devices: Disk with serial 'WDC_WD10_0EAGZ-00CRLB0_0000000001D9-0:0', mountpoint 'WDC_WD10_0EAGZ-00CRLB0' cannot be mounted.

Try changing the mount point name by clicking on it in UD

I tried changing the mount point name and that gave me a fail error too. Here’s the screenshot of the unassigned Devices. Thank so much for the help.

20 minutes ago, Thomsonpro said:

tried changing the mount point name and that gave me a fail error too

Post new diagnostics

26 minutes ago, trurl said:

Post new diagnostics

Here it is.

thomson-unraid-diagnostics-20260417-0820.zip

Try uninstalling the UD plugin, then delete its folder from /boot/config/plugins and reinstall again.

Unistalled UD, deleted the contents in the folder. Still no luck.

thomson-unraid-diagnostics-20260417-0927.zip

This looks more like a UD issue, it may be worth reporting it in the plugin support thread. Do you have a different disk you could connect, and does that work?

I connected a different device to the server through the USB and it mounted fine, so it's definitely something with that drive. It's really frustrating because it's a new 10TB drive I was using to back stuff up.