BTRFS-CHECK(8) Btrfs Manual BTRFS-CHECK(8)
NAME
btrfs-check - check or repair an unmounted btrfs filesystem
SYNOPSIS
btrfs check [options]
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
use 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
show extent state for a subvolume
--tree-root
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)
Btrfs v4.4 01/19/2016 BTRFS-CHECK(8)
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