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Unassigned device frozen in "Uninterruptible Sleep"

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Hi All,


I'm having this issue the last few months where either 1 of my 2 Unassigned device backup drives are locking up and nothing but a dirty unmount and/or reboot will resolve.


In the GUI, on the Main tab, the Unassigned Devices section just keeps loading and never finally loads, on the Dashboard it shows a single core maxed out but this is not the case in HTOP from the terminal. The drive that has locked is no longer available to view/use.


In the Terminal, running HTOP and sorting by State shows a few processes in the D (Uninterruptible Sleep) state that will stay that way for days if left alone so I assume forever. These are:

- /bin/df /dev/sdb1 --output=size,used,avail

- hdparm -C /dev/sdb

- find /mnt/disks/ST4000 -noleaf -maxdepth 4

- smartctl -x /dev/sdb


This problem has occurred on both of my connected USB drives and for both I have run full Smart diagnostics and not found issues. The issue occurs every 4 to 8 days and I thought it was cause by Duplicati but I have stopped all local backups and the issue persists (previously the Duplicati Docker also locked in D state as it tried to use the drive). The only way I can resolve is manually shutting down the array and then doing a hard reset as the system will not reboot.


I've searched for others having similar issues and have had no luck so anyone that can assist, I'd be very grateful for.







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