I needed to move disk so i stopped array.

But it won't stop and in the log i had : target is busy

Sorry i forgot to take a diag.

i checked with open files plugin and nothing was open.

i checked with lsof /mnt/pool and nothing either.

so i tried to remount the pool in readonly mode: failure with a message indicating dmesg could have more details.

I don't remember the exact message but something about failed btrfs transaction.

I ran btrfs scrub with no errors.

I needed my server up so i rebooted (with the gui)

The pool is clean but a parity checked was triggered due to an unclean shutdown.

 

I had that few weeks ago but it was due to an open file.

Is there a thing to verify in such a situation?

 

edit: the pool holds appadata, domains, system and nextcloud-aio

Edited June 8, 20233 yr by caplam

Without diags not much we can see, if the pool fails to mount again post some.

it didn't failed to mount but unmount. 

 

35 minutes ago, caplam said:

so i tried to remount the pool in readonly mode: failure with a message indicating dmesg could have more details.

I don't remember the exact message but something about failed btrfs transaction.

 

yes my bad. The primary problem was the impossibility to unmount the pool.

I read that umount -l could be "dangerous" as it simply mask the target.

So i tried mount -o remount,ro which failed.