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.

       -s <bytenr>
           specifiy offset to a superblock in a non-standard location at bytenr, useful for
           debugging (disables the -f option)

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)