http://netbsd.i2p/docs/guide/en/chap-rmmedia.html
Using a CD-R writer with data CDs The process of writing a CD consists of two steps: First,
a "image" of
the data must be generated, which can then be written to CD-R in a
second step. Reading a pre-existing ISO image # dd if=/dev/rcd0a of=filename.iso bs=2k # Alternatively, you can create a new ISO image yourself: Generating the ISO image Put all the data you want to put on CD into one directory.