A couple of days ago, I was performing a periodic parity check when I noticed that a drive was disabled. It showing 2000+ errors. I have 2 parity drives so I left the server on until I could deal with it. So, I got home from work tonight and noticed that a 2nd drive was disabled, this time with a whopping 2 errors. Other than the disabled drives things still looked okay.

I shutdown and replaced both drives. When I rebooted, the array started with the missing drives emulated. This seemed unusual to me, I thought it usually booted into maintenance mode when drives have been replaced. Anyway, I shut down the array, assigned the new drives and started the array. Of course this started the rebuild, but when I looked at the drive list, I saw that ALL of my data drives indicated Unmountable. I paused the rebuild and came here for help.

Obviously I would like to fix the file system on the old drives and continue the rebuild. I know I don't want to format 15 drives full of data. Any ideas what might have happened?

I have experienced this type of error in the past with mystery errors leading to drives being disable. I haven't checked yet, but experience tells me that the drives that "failed" are just fine and the data intact. If worst come to worst, I could rebuild the array from scratch if I can at least recover the file system on each drive. All help is appreciated.

unbucket-diagnostics-20251104-2103.zip

Unraid driver crashed, reboot and the drives should mount again.

6 hours ago, JorgeB said:

Unraid driver crashed, reboot and the drives should mount again.

Thanks, rebooted and everything looks good. Currently rebuilding.

Ironically, I started building a second box to use as backup but haven't finished it. Hopefully this scare will motivate me to get off my butt and finish this weekend.