February 25, 20251 yr Had a very brief power outage today and now my zpool will not mount. Keep getting "Unmountable: missing or no file system" error when I start the array. Running zpool import shows the pool online, but I cannot mount it or access the files. Hoping there is a way to save my data as it's newly migrated to a zpool and hadn't gotten to setting up the backups yet. Thanks for the help in advance! I have attached the diagnostic zip file. ares-diagnostics-20250224-1957.zip
February 25, 20251 yr Author root@Ares:~# zpool import pool_appdata cannot import 'pool_appdata': I/O error Destroy and re-create the pool from a backup source. Dang, I think I may be cooked. I also saw your advice in another thread about importing read only so I tried that, but got the same output.
February 25, 20251 yr Community Expert If read only also fails, the pool is likely cooked, this should not happen just with an unclean shutdown but could if there's some zfs bug, or an issue with the devices firmware, for example, where it lied about some writes being committed to the devices, when they actually weren't.
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