Mount iso freebsd

root@freebsd:~# mdconfig -a -t vnode -f systemrescuecd-x86-1.5.2.iso  -u 0
root@freebsd:~# mount -t cd9660 /dev/md0 /mnt
root@freebsd:~# df -h
Filesystem     Size    Used   Avail Capacity  Mounted on
/dev/ad0s1a    9.7G    405M    8.5G     4%    /
devfs          1.0K    1.0K      0B   100%    /dev
/dev/ad0s1d    9.7G    4.6G    4.3G    51%    /usr
/dev/ad0s1e     49G    4.2G     41G     9%    /var
devfs          1.0K    1.0K      0B   100%    /var/named/dev
/dev/md0       257M    257M      0B   100%    /mnt

root@freebsd:~# umount /mnt
root@freebsd:~# mdconfig -d -u md0
root@freebsd:~# df -h
Filesystem     Size    Used   Avail Capacity  Mounted on
/dev/ad0s1a    9.7G    405M    8.5G     4%    /
devfs          1.0K    1.0K      0B   100%    /dev
/dev/ad0s1d    9.7G    4.6G    4.3G    51%    /usr
/dev/ad0s1e     49G    4.2G     41G     9%    /var
devfs          1.0K    1.0K      0B   100%    /var/named/dev