How to make a .iso file from your CD or DVD

To make an ISO from your CD/DVD, place the media in your drive but do not mount it.

If it automounts, unmount it.

for DVD:

dd if=/dev/dvd of=dvd.iso 

for CD:

dd if=/dev/cdrom of=cd.iso

SATA device

dd if=/dev/sr0 of=file.iso

SCSI device:

dd if=/dev/scd0 of=cd.iso