btrfs-check (8)
Leading comments
Title: btrfs-check
Author: [FIXME: author] [see http://docbook.sf.net/el/author]
Generator: DocBook XSL Stylesheets v1.79.0 <http://docbook.sf.net/>
Date: 07/28/2017
Manual: Btrfs Manual
Source: Btrfs v4.12
Language: English
NAME
btrfs-check - check or repair an unmounted btrfs filesystemSYNOPSIS
btrfs check [options] <device>
DESCRIPTION
btrfs check is used to check or repair an unmounted btrfs filesystem.
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Note
Since btrfs is under development, the btrfs check capabilities are continuously enhanced. Itcqs highly recommended to read the following btrfs wiki before executing btrfs check with --repair option: m[blue]btrfs.wiki.kernel.org/index.php/Btrfsckm[]
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
-p|--progress
- indicate progress at various checking phases
--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 m[blue]btrfs.wiki.kernel.orgm[] for further details.