freebsd mount挂载iso

4.0中如下

kldload vn

vnconfig -c /dev/vn0 /xxx/xxx.iso

mount_cd9660 /dev/vn0 /xxx/xxx

umount /dev/vn0

vnconfig -u /dev/vn0

在5.0中如下

mdconfig -a -t vnode -f abc.iso -u 1

mount_cd9660 /dev/md1 /cdrom