diff --git a/en_US.ISO8859-1/books/handbook/disks/chapter.sgml b/en_US.ISO8859-1/books/handbook/disks/chapter.sgml
index 1d80d15a3e..1650735b6e 100644
--- a/en_US.ISO8859-1/books/handbook/disks/chapter.sgml
+++ b/en_US.ISO8859-1/books/handbook/disks/chapter.sgml
@@ -2422,14 +2422,16 @@ Filesystem 1K-blocks Used Avail Capacity Mounted on
if you want to create and mount the same file system image as
above, simply type the following:
+
+ Configure and Mount a File-Backed Disk with mdmfs&prompt.root; dd if=/dev/zero of=newimage bs=1k count=5k
5120+0 records in
-5120+0 records in
5120+0 records out
&prompt.root; mdmfs -F newimage -s 5m md0/mnt
&prompt.root; df /mnt
Filesystem 1K-blocks Used Avail Capacity Mounted on
/dev/md0 4846 2 4458 0% /mnt
+ If you use the option without unit
number, &man.mdmfs.8; will use &man.md.4; auto-unit feature to