EDIT: ignore the stuff about disk 1 weirdness (its being replaced). I do still need help with my cache Pool. How can I recover it?

 

 

I just spent the last 2 days replacing 2 disks (older wd 5400 shucked drives with wd red pro 20TB) in my array. I have dual parity so I was doing both at the same time. Disk 1 (the problem child) and disk 18 (seems to be okay). So the rebuild completed with no errors today. Last night I noticed something odd on the Main page where disk 1 was showing odd capacity stats (far right column). It claimed to be 2.5TB with 18PB free space. Since it was otherwise doing okay I figured it was cosmetic issue. Once the rebuild completed the capacity oddness remained so I figured I'd try a reboot. That's where it went sideways. On reboot it hung trying to mount disk 1 (problem child). I let it go for a far amount of time but it was obvious a hang. Both parity and disk 1 LED where lit solid no blinking. I forced a reboot (reset button) and it got stuck at the same place. I got the idea to zap the volume on disk 1 and see if it would rebuild properly a second time. I deleted the volume using disk management on my windows laptop w/external drive via USB. 

Added the drive back to server and started up but didn't recognize that the disk had changed and hung again. I shut down and pulled the drive, restarted to get to a "missing disk" state. That worked BUT now it would not let me start the array because my cache pool config disappeared (error:  Wrong Pool State cache - too many wrong or missing devices). I have 4x 1TB nvme that was confg'd as 2TB RAID1. I don't have any idea which order thay were in so I'm reluctant to start added a new pool.

Not sure what to do at this point. I'm ready to try and exchange disk one for a new one if that would help but I really need my plex server back up in the meantime. Not sure if diags will tell the whole story as there were multiple reboots during this process.

tower-diagnostics-20241205-1416.zip

Edited December 5, 20241 yr by interwebtech

UPDATE: I'm returning the disk with odd behavior. So basically I need help getting my Cache Pool back online.

(I have 2 more disks coming Saturday so disk 1 will be replaced soon)

Need some reassurance I'm on the right path to restore my cache pool.  I have setup (not committed yet) the pool based on the device IDs unRaid had assigned to the drives (see pic). The cache was formatted as BTRFS. Do I need to specify that in the cache Settings or will "auto" pick it up automatically? (see other pic)

 

 

Edited December 6, 20241 yr by interwebtech

The answer to both questions was YES. Started array and cache pool was restored. All dockers appear to be present.