btrfs-select-super(8)
=====================

NAME
----
btrfs-select-super - overwrite superblock with a backup

SYNOPSIS
--------
*btrfs-select-super* -s number dev

DESCRIPTION
-----------
*btrfs-select-super* destructively overwrites all copies of the superblock
with a specified copy.  This helps with certain cases of damage, especially
when barriers were disabled during a power failure.  You can find a valid
copy of the superblock with *btrfs check -s*.

The filesystem specified by `dev` must not be mounted.

OPTIONS
-------
-s|--super <superblock>::
use <superblock>th superblock copy, valid values are 0 up to 2 if the
respective superblock offset is within the filesystem

SEE ALSO
--------
`btrfsck check`(8)
