6 btrfs-check - check or repair a btrfs filesystem offline
10 'btrfs check' [options] <device>
14 'btrfs check' is used to check or repair a btrfs filesystem offline.
16 NOTE: Since btrfs is under heavy development especially the 'btrfs check'
17 command, it is *highly* recommended to read the following btrfs wiki before
18 executing 'btrfs check' with '--repair' option: +
19 https://btrfs.wiki.kernel.org/index.php/Btrfsck
21 'btrfsck' is an alias of 'btrfs check' command and is now deprecated.
25 -s|--support <superblock>::
26 use <superblock>th superblock copy.
28 try to repair the filesystem.
30 create a new CRC tree.
32 create a new extent tree.
36 'btrfs check' returns a zero exist status if it succeeds. Non zero is
37 returned in case of failure.
41 'btrfs' is part of btrfs-progs. Btrfs filesystem is currently under heavy
43 and not suitable for any uses other than benchmarking and review.
44 Please refer to the btrfs wiki http://btrfs.wiki.kernel.org for