FreeBSD CD and DVD's

Copy a CD or DVD to a ISO image

The media should not be mounted.

dd if=/dev/acd0 of=dvd.iso ibs=2048

Mount a ISO image from a file

If you have a ISO image in a file you cant make a memory disk and mount it

 
bsd# file *
heth.iso:     ISO 9660 CD-ROM filesystem data 'THE_ATTIC                      '
bsd# mdconfig -a -t vnode -f /home2/heth/dvd/heth.iso -u 1
bsd# mount -t cd9660 /dev/md1 /cdrom
bsd# df
Filesystem  1K-blocks     Used   Avail Capacity  Mounted on
/dev/ad0s1a    507630   196094  270926    42%    /
devfs               1        1       0   100%    /dev
/dev/ad0s1e    507630   142602  324418    31%    /tmp
/dev/ad0s1f  34336612 25245812 6343872    80%    /usr
/dev/ad0s1d   1506190   970188  415508    70%    /var
/dev/ad1s1d   9680238  8456664  449156    95%    /home2
/dev/ad1s1e   8230158  1836582 5735164    24%    /usr2
devfs               1        1       0   100%    /var/named/dev
/dev/md1      4391040  4391040       0   100%    /cdrom

Unmounting it again and removing the memory disk.

bsd# umount /cdrom
bsd# mdconfig -d -u 1