I’m confused about this output. What does this mean? Especially “We have a space info key for a block group that doesn’t exist”. Also, it says errors found?

  • HelloRoot@lemy.lolEnglish
    4·
    29 days ago

    This means there’s a metadata inconsistency: a reference to a block group (allocation unit) that isn’t actually present in the filesystem. Essentially, the filesystem bookkeeping is pointing to something missing.

    There were errors, but since check by default is read only, no changes were made.

    replace mountpoint with where that drive is mounted and try:

    sudo btrfs scrub start -Bd /mountpoint

    this should fix the inconsistency iirc

    Or alternatively:

    sudo btrfs check --repair /dev/sdb1

    but this is scarier since it might result in data loss