2021-10-14 11:08:24 +01:00
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# btrfs check
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> Check or repair a btrfs filesystem.
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2022-11-15 11:50:15 +00:00
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> More information: <https://btrfs.readthedocs.io/en/latest/btrfs-check.html>.
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2021-10-14 11:08:24 +01:00
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- Check a btrfs filesystem:
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`sudo btrfs check {{path/to/partition}}`
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- Check and repair a btrfs filesystem (dangerous):
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`sudo btrfs check --repair {{path/to/partition}}`
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- Show the progress of the check:
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`sudo btrfs check --progress {{path/to/partition}}`
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- Verify the checksum of each data block (if the filesystem is good):
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`sudo btrfs check --check-data-csum {{path/to/partition}}`
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- Use the `n`-th superblock (`n` can be 0, 1 or 2):
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`sudo btrfs check --super {{n}} {{path/to/partition}}`
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- Rebuild the checksum tree:
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`sudo btrfs check --repair --init-csum-tree {{path/to/partition}}`
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- Rebuild the extent tree:
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`sudo btrfs check --repair --init-extent-tree {{path/to/partition}}`
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