.TH BTRFSTUNE 8
.SH NAME
btrfstune \- tune various filesystem parameters.
.SH SYNOPSIS
.B btrfstune [\fIoptions\fP] \fI<device>\fP
.SH DESCRIPTION
\fBbtrfstune\fP is used to tune various filesystem parameters,you can
enable/disable some extended features for btrfs.

\fIOptions\fP
.IP "\fB-S \fI<value>\fP" 5
updates the seeding value, it forces a fs readonly so that you can use it to build other filesystems.
.IP "\fB-r\fP" 5
enable extended inode refs.
.IP "\fB-x\fP" 5
enable skinny metadata extent refs.

.SH EXIT CODE
\fBbtrfstune\fP will return 0 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)