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38 lines
997 B
Plaintext
38 lines
997 B
Plaintext
---
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syntax: markdown
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tags: [tldr, linux]
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source: https://github.com/tldr-pages/tldr.git
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---
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# btrfs check
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> Check or repair a btrfs filesystem.
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> More information: <https://btrfs.readthedocs.io/en/latest/btrfs-check.html>.
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- Check a btrfs filesystem:
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`sudo btrfs {{[c|check]}} {{path/to/partition}}`
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- Check and repair a btrfs filesystem (dangerous):
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`sudo btrfs {{[c|check]}} --repair {{path/to/partition}}`
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- Show the progress of the check:
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`sudo btrfs {{[c|check]}} {{[-p|--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 {{[c|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 {{[c|check]}} {{[-s|--super]}} {{n}} {{path/to/partition}}`
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- Rebuild the checksum tree:
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`sudo btrfs {{[c|check]}} --repair --init-csum-tree {{path/to/partition}}`
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- Rebuild the extent tree:
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`sudo btrfs {{[c|check]}} --repair --init-extent-tree {{path/to/partition}}`
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