Hi all,

Diagnostics attached

I’m hoping someone can point me in the right direction. Whenever I press Stop on my Unraid array it just sits there saying “Unmounting disks…” over and over. I’ve already shut down every VM and Docker container first, but the array still won’t complete the stop.

What I’m seeing every few seconds in the log is something like this (the exact directory changes):

Retry unmounting disk share(s)...

Unmounting disks...

umount /mnt/cache_big

umount: /mnt/cache_big: not mounted.

exit status: 32

Eventually I give up and force-reboot, which I know isn’t ideal.

Sometimes I've found running umount -l /mnt/user will help it finalize the array stop but from my understanding this is also not ideal.

My setup

• Fairly big array - 29 disks, 500TB - plus two cache pools.

• A handful of remote shares (truenas) mounted with the Unassigned Devices plugin.

• No VMs or Dockers running when I try to stop the array

Things I’ve already tried:

1. Stopping Docker and libvirt in Settings.

2. Making sure no computers on the network are browsing the shares. (though we do have shares mounted as drives on machines)

3. Waiting (sometimes for an hour) – the message just keeps repeating.

I’m not very technical, so if there’s a straightforward checklist or setting I’m missing, I’d really appreciate it. I just want a reliable way to shut the array down cleanly without digging into the command line every time.

Thanks in advance for any advice!

diagnostics-20250702-2214.zip

Disable Docker and VM service and reboot in safe mode, start the array and see if it stops, if yes, retest again after booting in normal mode to rule out a plugin issue, leave the services still disabled, if still OK enable one of the services and retest, then the other, note that if the issue happens with the docker service enabled only, you may need to try enabling one or a few containers at a time to find the culprit.

@JorgeB thanks for the instructions, I'll jump into that as soon as the server has some downtime.

One thing I believe is true is that I can happily start and stop the array if I have only just booted (i.e. not started VM's or Dockers at all).