QPS (800-559-4777) has the following optional drives available for the CD-RACK.

10 Gig hard drive- $399 Ultra SCSI to SCSI II drive
(including Module, external cable, 50-50 pin centronics SCSI cable, 25-50pin SCSI cable and two active terminators)

Orb Drive 2.5Gig- $219 (limited quantities)
(including Module, external cable, 50-50 pin centronics SCSI cable, 25-50pin SCSI cable and two active terminators)

MO Drive 1.3Gig- $479
(including Module, external cable, 50-50 pin centronics SCSI cable, 25-50pin SCSI cable and two active terminators)