.TH BTRFS-SHOW-SUPER 8
.SH NAME
btrfs-show-super \- show btrfs superblock information stored in devices
.SH SYNOPSIS
.B btrfs-show-super [\fIoptions\fP] \fI<dev>\fP [\fI<dev>...\fP]
.SH DESCRIPTION
\fBbtrfs-show-super\fP is used to print the information of superblock,
you can specify which mirror to print out. In default, every device's
first superblock will be printed out.

\fIOptions\fP
.IP "\fB-a\fP" 5
print all the superblock information, if this option is given, '\fB-i\fP' option will be ignored.
.IP "\fB-i \fI<super_mirror>\fP" 5
specify which mirror to print out. \fI<super_mirror>\fP is between 0 and 2. if several '\fB-i \fI<super_mirror>\fP'\fR are given, only the last one is valid.

.SH EXIT CODE
\fBbtrfs-show-super\fR will return 0 exit code if no error happened.
If any problems happened, 1 will be returned.

.SH AUTHOR
Written by Shilong Wang and Wenruo Qu.

.SH COPYRIGHT
Copyright \(co 2013 Fujitsu, Inc.
License GPLv2: GNU GPL version 2 <http://gnu.org/licenses/gpl.html>.
.br
This is free software: you are free  to  change  and  redistribute  it. There is NO WARRANTY, to the extent permitted by law.
.SH SEE ALSO
.BR mkfs.btrfs (8)