Revision as of 16:04, 27 August 2015

btrfs-check(8) Manual Page

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.

SEE ALSO

mkfs.btrfs(8), btrfs-scrub(8), btrfs-rescue(8)