btrfs rescue

Try to recover a damaged btrfs filesystem. More information: https://btrfs.readthedocs.io/en/latest/btrfs-rescue.html.

• Rebuild the filesystem metadata tree (very slow):
  sudo btrfs rescue chunk-recover {{path/to/partition}}
• Fix device size alignment related problems (e.g. unable to mount the filesystem with super total bytes mismatch):
  sudo btrfs rescue fix-device-size {{path/to/partition}}
• Recover a corrupted superblock from correct copies (recover the root of filesystem tree):
  sudo btrfs rescue super-recover {{path/to/partition}}
• Recover from an interrupted transactions (fixes log replay problems):
  sudo btrfs rescue zero-log {{path/to/partition}}
• Create a /dev/btrfs-control control device when mknod is not installed:
  sudo btrfs rescue create-control-device