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
-------
-a::
Print all the superblock information.
+
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.

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

AUTHOR
------
Written by Shilong Wang and Wenruo Qu.

COPYRIGHT
---------
Copyright (C) 2013 FUJITSU LIMITED.

License GPLv2: GNU GPL version 2 <http://gnu.org/licenses/gpl.html>.

This is free software: you are free  to  change  and  redistribute  it. There is NO WARRANTY, to the extent permitted by law.

SEE ALSO
--------
`mkfs.btrfs`(8)