no success …
~# btrfs check --fix-crc /dev/sda2
btrfs check: unrecognized option: fix-crc
usage: btrfs check [options]
…
~# btrfs check --check-data-csum /dev/sda2
Warning, could not drop caches
Warning, could not drop caches
checksum verify failed on 7831552 found 8EE1CCDC wanted D51F1F2E
checksum verify failed on 7831552 found 8EE1CCDC wanted D51F1F2E
Csum didn’t match
Couldn’t setup log root tree
Warning, could not drop caches
Couldn’t open file system