Can I know cause of previcious I/O error to superblock detected?

[Jin-Gyu]

Hi!

*Fortigate model is 401F

I understand that the cause of 'prevalent I/O error to superblock detected' is a firmware issue or a disk issue. Is there a way to find out clearly where this is the problem?

I'd like to know exactly where this problem comes from.(Firmware or Disk)

Thank you.

[jagiapa9]

Any errors in btrfs device stats indicate it’s degraded and unraids ui doesn’t indicate it. I’d suggest to clear the device stats, run a scrub to repair, check device stats again if there’s any non zero values clear it again and run scrub again to verify. At that point should be all 0 and the array is resynched, unless there’s a hardware issue or unrepairable corruption.