Manpage/btrfs-check
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Revision as of 16:04, 27 August 2015
Contents |
btrfs-check(8) Manual Page
Note: manual pages are located at
read-the-docs site, please update your links.
NAME
btrfs-check - check or repair an unmounted btrfs filesystem
SYNOPSIS
btrfs check [options] <device>
DESCRIPTION
btrfs check is used to check or repair an unmounted btrfs filesystem.
Note: Since btrfs is under development, the btrfs check capabilities are continuously enhanced. It’s highly recommended to read the following btrfs wiki before executing btrfs check with --repair option:
https://btrfs.wiki.kernel.org/index.php/Btrfsck
btrfsck is an alias of btrfs check command and is now deprecated.
OPTIONS
- -s|--super <superblock>
- use <superblock>th superblock copy, valid values are 0 up to 2 if the respective superblock offset is within the fileystem
- --repair
- try to repair the filesystem
- --init-csum-tree
- create a new CRC tree and recalculate all checksums
- --init-extent-tree
- create a new extent tree
- --check-data-csum
- verify checkums of data blocks
- --qgroup-report
- verify qgroup accounting and compare against filesystem accounting
- --subvol-extents <subvolid>
- show extent state for a subvolume
- --tree-root <bytenr>
- use the given bytenr for the tree root
EXIT STATUS
btrfs check returns a zero exit status if it succeeds. Non zero is returned in case of failure.
AVAILABILITY
btrfs is part of btrfs-progs. Please refer to the btrfs wiki http://btrfs.wiki.kernel.org for further details.