btrfs-check(8)
==============

NAME
----
btrfs-check - check or repair a btrfs filesystem offline

SYNOPSIS
--------
'btrfs check' [options] <device>

DESCRIPTION
-----------
'btrfs check' is used to check or repair a btrfs filesystem offline.

OPTIONS
-------
-s|--support <superblock>::
use <superblock>th superblock copy.
--repair::
try to repair the filesystem.
--init-csum-tree::
create a new CRC tree.
--init-extent-tree::
create a new extent tree.

EXIT STATUS
-----------
'btrfs check' returns a zero exist status if it succeeds. Non zero is
returned in case of failure.

AVAILABILITY
------------
'btrfs' is part of btrfs-progs. Btrfs filesystem is currently under heavy
development,
and not suitable for any uses other than benchmarking and review.
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)
`btrfsck`(8)