When I boot up I get the following messages about my CD drives:
localhost kernel: hdc: HITACHI DVD-ROM GD-7000, ATAPI CD/DVD-ROM drive
localhost kernel: hdd: SONY CD-RW CRX185E1, ATAPI CD/DVD-ROM drive
localhost kernel: hdd: set_drive_speed_status: status=0x51 { DriveReady SeekComplete Error }
localhost kernel: hdd: set_drive_speed_status: error=0x04
localhost autofs: automount startup succeeded
localhost kernel: ide1: Drive 1 didn't accept speed setting. Oh, well.
I noticed that a couple of earlier messages also referred to "hdd".
localhost kernel: Kernel command line: ro root=/dev/Volume00/LogVol00 hdd=ide-scsi rhgb
localhost kernel: ide_setup: hdd=ide-scsi