tldr/pages/linux/btrfs-check.md

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2021-10-14 11:08:24 +01:00
# btrfs check
> Check or repair a btrfs filesystem.
> More information: <https://btrfs.readthedocs.io/en/latest/btrfs-check.html>.
2021-10-14 11:08:24 +01:00
- 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}}`