BTRFS-CHECK(8)                             Btrfs Manual                            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.

           Note
           Since btrfs is under heavy development especially the btrfs check command, it is
           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.

       --repair
           try to repair the filesystem.

       --init-csum-tree
           create a new CRC tree.

       --init-extent-tree
           create a new extent tree.

       --check-data-csum
           verify checkums of data blocks.

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 v3.17                                 11/22/2014                             BTRFS-CHECK(8)