I have my cache pool set as degraded after an unclean shutdown. Both drives are shown as fully healthy and have no errors. But nvme1n1 lost the partition completely. The data is still there on the first drive. What is the best way to restore the pool?

unraid-diagnostics-20260612-1851.zip

Please post new diags with the array started.

2 hours ago, JorgeB said:

Please post new diags with the array started.

unraid-diagnostics-20260612-2256.zip

Pool has some single profile chunks, so it's not possible to just re-add the missing device. You can do this:

• with the array running type

  btrfs balance start -f -dconvert=single,soft -mconvert=single,soft /mnt/cache

• once that's done type

  btrfs device remove missing /mnt/cache

• stop the array, and reimport he pool wit the singe device

  on main click on the first device for that pool and then "remove pool"

  back on main, create a new pool with the same name and 1 slot

  assign the good pool device, leave the filesystem set to auto

  start the array to import the pool

• once the pool is imported as single, stop the array

• change the slots to 2

• assign the other device

• start array to begin balance