Btrfs Data scrubbing

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as copy-on-write (cow) file system linux, btrfs provides fault isolation, corruption detection , correction, , file-system scrubbing. if file system detects checksum mismatch while reading block, first tries obtain (or create) copy of block device – if internal mirroring or raid techniques in use.


btrfs can initiate online check of entire file system triggering file system scrub job performed in background. scrub job scans entire file system integrity , automatically attempts report , repair bad blocks finds along way.








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