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BTRFS-SELECT-SUPER(8)                                Btrfs Manual                               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)



Btrfs v4.4.1                                          11/05/2016                                BTRFS-SELECT-SUPER(8)