Had a power failure causing an improper shutdown and the array is stuck at mounting status and not getting any further.

Any suggestions on how to get it sorted. Diagnostics attached.

plexnas-diagnostics-20251127-1210.zip

Thanks,

The zfs pool is crashing; it's also detecting data corruption, so before trying anything else, I would recommend running memtest.

After that, disable array auto-start by editing disk.cfg on your flash drive (config/disk.cfg) and changing startArray="yes" to "no".

Then, before starting the array, see if the pool mounts read-only

zpool import -o readonly=on cache

If that works, start the array; the pool will show unmountable in the GUI, but the data should be under /mnt/cache. Back up and then recreate the pool

Hi,

Thanks for the info, I will give it a go.

It did seem to mount as read only and yep the cache pool is unmountable.

With 2 cache drives, is it just recreate the pool and it will wipe everything?

Edited November 27, 2025Nov 27 by Hurco

1 hour ago, Hurco said:

With 2 cache drives, is it just recreate the pool and it will wipe everything?

It will wipe everything from the pool, so backup any important data first.