ENV{ID_CDROM_DVD_R}=="?*" SYMLINK="dvdrw cdrom" GROUP="cdrom"
ENV{ID_CDROM_DVD}=="?*" ENV{ID_CDROM_DVD_R}=="" SYMLINK="dvd cdrom1" GROUP="cdrom"
ENV{ID_CDROM_CD_R}=="?*" ENV{ID_CDROM_DVD}=="" SYMLINK="cdrw cdrom2" GROUP="cdrom"