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}}