etc/udev/debian/simple-cd-aliases.rules

   1 # grouping of optical drives from multiple kernel subsystems
   2 BUS="scsi", KERNEL="sr[0-9]*",                        SYMLINK="cdrom%e"
   3 BUS="ide",  KERNEL="hd[a-z]",   SYSFS{removable}="1", SYMLINK="cdrom%e", PROGRAM="/bin/cat /proc/ide/%k/media", RESULT="cdrom"
   4 BUS="ide",  KERNEL="pcd[0-9]*", SYSFS{removable}="1", SYMLINK="cdrom%e"
   5