BTRFS-SHOW-SUPER(8)                        Btrfs Manual                       BTRFS-SHOW-SUPER(8)



NAME
       btrfs-show-super - show btrfs superblock information stored in devices

SYNOPSIS
       btrfs-show-super [options] <dev> [<dev>...]

DESCRIPTION
       btrfs-show-super is used to print the information of superblock, you can specify which
       mirror to print out.

       By default, every device’s first superblock will be printed out.

       Mainly used for debug purpose.

OPTIONS
       -f
           Print full superblock information.

           Including the system chunk array and backup roots.

       -a
           Print information of all superblocks.

           If this option is given, -i option will be ignored.

       -i <super_mirror>
           Specify which mirror to print out.

           <super_mirror> is between 0 and 2. If several -i '<super_mirror>' are given, only the
           last one is valid.

       -F
           Attempt to print the superblock even if no superblock magic is found. May end badly.

EXIT STATUS
       btrfs-show-super will return 0 if no error happened. If any problems happened, 1 will be
       returned.

SEE ALSO
       mkfs.btrfs(8)



Btrfs v3.17                                 11/22/2014                        BTRFS-SHOW-SUPER(8)