Hello, Le 30/07/2019 à 09:21, Qu Wenruo a écrit : > Unfortunately, transid error here helps nothing. Now, each and everytime I try to mount this disk on the original machine, or another one, I get : systemd[1]: run-media-xxxxxxxxxxxxxxxx.mount: Succeeded. kernel: BTRFS info (device dm-2): disk space caching is enabled kernel: BTRFS info (device dm-2): has skinny extents kernel: BTRFS error (device dm-2): parent transid verify failed on 2137144377344 wanted 7684 found 7499 kernel: BTRFS error (device dm-2): parent transid verify failed on 2137144377344 wanted 7684 found 7499 kernel: BTRFS error (device dm-2): parent transid verify failed on 2137144377344 wanted 7684 found 7499 kernel: BTRFS: error (device dm-2) in btrfs_drop_snapshot:9465: errno=-5 IO failure kernel: BTRFS info (device dm-2): forced readonly (It first appears to mount OK, then the errors follow a few seconds afterwards, and the it remounts readonly). The "7499" displays seems to correspond to the most recent snapshot created on the disk (using btrfs su li). Is there any way I could repair this several-TB FS, ever if it implies losing the latest (or a few of the latest) created subvols and snapshots ? TIA. Kind regards.
