Hi,
one of my 3 Cache disks has gone bad and after removing it with help from the FAQ the Pool shows as "Unmountable: No file system".
I already tried all the instructions from the FAQ except for BTRFS check --repair.
This is the result for trying to mount the file system read only:
mount: /cachebackup: wrong fs type, bad option, bad superblock on /dev/mapper/sdc1, missing codepage or helper program, or other error.
This is the output for btrfs restore:
No valid Btrfs foun