I recently shrank my array of three old 8TB HDDs and now the fix common problems plugin is giving me errors saying "Invalid folder disk6/7/8 contained within /mnt". I'm assuming these are just leftover from the three disks I removed from the array and I can safely delete the old empty folders, but I just wanted to confirm that this is OK to do in order to get rid of these errors, instead of just ignoring them.

39 minutes ago, nicduv said:

I recently shrank my array of three old 8TB HDDs and now the fix common problems plugin is giving me errors saying "Invalid folder disk6/7/8 contained within /mnt". I'm assuming these are just leftover from the three disks I removed from the array and I can safely delete the old empty folders, but I just wanted to confirm that this is OK to do in order to get rid of these errors, instead of just ignoring them.

There should not be leftovers of this sort.    Seems you probably have something (such as a docker container) referencing them and thus recreating them.

Ah, that makes sense. I forgot to update my docker for my homepage dashbaord that was referencing them for individual disk usage stats. I've now removed those references.

 

Is it safe to manually remove those folders that are still there or will they get removed automatically on the next system reboot?

2 minutes ago, nicduv said:

or will they get removed automatically on the next system reboot?

This (as long as you really have removed all references).

I didn't end up getting around to restarting my server until just now and it looks like that was the issue. After removing the references from that docker container, the old disk folders were removed from the mnt directory after the reboot.