This is the line from my fstab for my cdrom drive:
/dev/cdrom /media/cdrom auto ro,noauto,user,exec 0 0
When I do 'ls /dev/cdrom', I find that /dev/cdrom is a link to /dev/hdc. So, if you have more than one such drive, you will need one such line for each drive.
is a link to a tutorial on how to create devices and their links.