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btrfs-rescue: add page (#6963)

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kyteinsky 2021-10-25 21:14:30 +00:00 • committed by GitHub
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# btrfs rescue
> Try to recover a damaged btrfs filesystem.
> More information: <https://btrfs.wiki.kernel.org/index.php/Manpage/btrfs-rescue>.
- 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`