Signed-off-by: Goffredo Baroncelli <kreijack@inwind.it>
\fB-t size\fP defragment only files at least \fIsize\fR bytes big
+For \fBstart\fP, \fBlen\fP, \fBsize\fP it is possible to append a suffix
+like \fBk\fP for 1 KBytes, \fBm\fP for 1 MBytes...
+
NOTE: defragmenting with kernels up to 2.6.37 will unlink COW-ed copies of data,
don't use it if you use snapshots, have de-duplicated your data or made
copies with \fBcp --reflink\fP.
.TP
\fB\-V\fR, \fB\-\-version\fR
Print the \fBmkfs.btrfs\fP version and exit.
+.SH UNIT
+As default the unit is the byte, however it is possible to append a suffix
+to the arguments like \fBk\fP for KBytes, \fBm\fP for MBytes...
.SH AVAILABILITY
.B mkfs.btrfs
is part of btrfs-progs. Btrfs is currently under heavy development,