2014-04-02 08:29:33 +00:00
|
|
|
btrfs-show-super(8)
|
|
|
|
|
====================
|
|
|
|
|
|
|
|
|
|
NAME
|
|
|
|
|
----
|
|
|
|
|
btrfs-show-super - show btrfs superblock information stored in devices
|
|
|
|
|
|
|
|
|
|
SYNOPSIS
|
|
|
|
|
--------
|
2014-05-19 15:49:35 +00:00
|
|
|
*btrfs-show-super* [options] <dev> [<dev>...]
|
2014-04-02 08:29:33 +00:00
|
|
|
|
|
|
|
|
DESCRIPTION
|
|
|
|
|
-----------
|
2014-05-19 15:49:35 +00:00
|
|
|
*btrfs-show-super* is used to print the information of superblock,
|
2014-04-02 08:29:33 +00:00
|
|
|
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
|
|
|
|
|
-------
|
2014-05-08 03:03:58 +00:00
|
|
|
-f::
|
|
|
|
|
Print full superblock information.
|
|
|
|
|
+
|
|
|
|
|
Including the system chunk array and backup roots.
|
|
|
|
|
|
2014-04-02 08:29:33 +00:00
|
|
|
-a::
|
2014-05-08 03:03:58 +00:00
|
|
|
Print information of all superblocks.
|
2014-04-02 08:29:33 +00:00
|
|
|
+
|
|
|
|
|
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.
|
|
|
|
|
|
2014-05-14 02:03:04 +00:00
|
|
|
-F::
|
|
|
|
|
Attempt to print the superblock even if no superblock magic is found. May end
|
|
|
|
|
badly.
|
|
|
|
|
|
2014-04-02 08:29:33 +00:00
|
|
|
EXIT STATUS
|
|
|
|
|
-----------
|
2014-05-19 15:49:35 +00:00
|
|
|
*btrfs-show-super* will return 0 if no error happened.
|
2014-04-02 08:29:33 +00:00
|
|
|
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)
|
