btrfs check

Check or repair a btrfs filesystem. More information: https://btrfs.readthedocs.io/en/latest/btrfs-check.html.

• Check a btrfs filesystem:

sudo btrfs check path/to/partition

• Check and repair a btrfs filesystem (dangerous):

sudo btrfs check --repair path/to/partition

• Show the progress of the check:

sudo btrfs check --progress path/to/partition

• Verify the checksum of each data block (if the filesystem is good):

sudo btrfs check --check-data-csum path/to/partition

• Use the n-th superblock (n can be 0, 1 or 2):

sudo btrfs check --super n path/to/partition

• Rebuild the checksum tree:

sudo btrfs check --repair --init-csum-tree path/to/partition

• Rebuild the extent tree:

sudo btrfs check --repair --init-extent-tree path/to/partition