Disabled disk and invalid parity 🤐

[FloPinguin]

Hello,

 

I have a problem, one disk is disabled because of read errors (emulated). And the parity is invalid (I did a non-correcting parity check before that and it had some errors).

 

The disk seems to be fine, nothing problematic in the smart report and a extended self-test finished without errors.

 

I have two parity disks.

 

Will I get problems if I let unraid rebuild that disk onto itself?

nas-diagnostics-20240917-1212.zip nas-smart-20240917-1209.zip

[itimpi]

1 hour ago, FloPinguin said:

Will I get problems if I let unraid rebuild that disk onto itself?

If parity is not valid then a rebuild will result in a corrupt disk.

 

A better approach would be to stop the array; unassign the drive and then restart the array.    
 

At this point there are 2 ways to proceed:

• look to see if Unraid is successfully emulating the drive and the contents look correct.   If so rebuilding would be the way to proceed, ideally to another drive keeping the old one intact in case something goes wrong during the rebuild.
• try mounting the removed drive using Unassigned devices.   If this succeeds and the content looks correct then you can use the New Config tool to get the drive back into the array and rebuild parity to match.

 

[FloPinguin]

Thank you for the help! I went with Option 2 and it worked