If it's an IDE burner, and you ARE using scsi emulation, the device is probably going to be /dev/scd0 or /dev/sr0
If you are NOT using scsi emulation, try /dev/hdc But this depends on your other drives and jumper settings. Here's a chart so you can decide which device to try to mount:
Primary Master = /dev/hda
Primary Slave = /dev/hdb
Secondary Master = /dev/hdc
Secondary Slave = /dev/hdd
Cool
FYI = When I type Primary Master, everytime I actually type Primary MasterC, just by force of habit. he he he