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Diffstat (limited to 'Documentation/btrfs-scrub.asciidoc')
-rw-r--r-- | Documentation/btrfs-scrub.asciidoc | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/Documentation/btrfs-scrub.asciidoc b/Documentation/btrfs-scrub.asciidoc index 4c49269e..44022657 100644 --- a/Documentation/btrfs-scrub.asciidoc +++ b/Documentation/btrfs-scrub.asciidoc @@ -16,7 +16,10 @@ and metadata blocks from all devices and verify checksums. Automatically repair corrupted blocks if there's a correct copy available. NOTE: Scrub is not a filesystem checker (fsck) and does not verify nor repair -structural damage in the filesystem. +structural damage in the filesystem. It really only checks checksums of of data +and tree blocks, it doesn't ensure the content of tree blocks is valid and +consistent. There's some validation performed when metadata blocks are read +from disk but it's not extensive and cannot substitute full 'btrfs check' run. The user is supposed to run it manually or via a periodic system service. The recommended period is a month but could be less. The estimated device bandwidth |