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)

Btrfs v4.4                                         08/13/2019                                BTRFS-SHOW-SUPER(8)