Just updated unraid directly from the 6.9.2 to 6.10.2. Now the btrfs cache with 2 disks doesn't work. It says "Unmountable: Volume not encrypted". Tried restarting the array but didn't work. Not sure what to do other than formatting. 

fatma-diagnostics-20220601-1219.zip

Second device is not being decrypted, like if it's not encrypted, I assume both were part of the pool? If yes post the output of:

 

cryptsetup luksOpen /dev/nvme0n1p1 nvme0n1p1

 

I just unassigned and re assigned the second drive and let btrfs do its thing again. But for future reference and may be helping others:

 

What would cause this? 

Is there an other way to fix it?

And where to look in the diagnostics? 

 

and if it matters hers the output now:

root@fatma:~# cryptsetup luksOpen /dev/nvme0n1p1 nvme0n1p1
Device nvme0n1p1 already exists.

 

I suspect something was already wrong with the pool pre-update, like it was only one of the devices.