HP J3278B SureStore CD-ROM Server
This tower has a server module in the top bay, and high-speed HP SureStore CD-ROM drives pre-installed in the other seven bays.
HP J4150A SureStore CD-ROM Server Plus
This tower has a server module in the top bay. A large internal hard drive is installed in the second bay, providing HP Multi-Disc Cache for storing copies of CDs and providing increased performance for all CDs. High-speed HP SureStore CD-ROM drives are pre-installed in the other six bays.
HP J4152A SureStore CD/DVD-ROM Server
This tower has a server module in the top bay, and high-speed HP DVD-ROM drives pre-installed in the other seven bays. These drives read both CD and DVD-ROM discs.
All the towers have an expansion SCSI connector for attaching a second tower with seven more drives, such as the HP J4148A SureStore CD Expansion Tower with its seven CD-ROM drives.
The SCSI bus is terminated at one end by the server module and at the other end by an internal active terminator on the backplane.
The SCSI IDs are set automatically based on the position of the HP drives in the tower. The topmost drive in the tower (CD or DVD or hard disk) is assigned ID 0 (zero), the second drive (CD or DVD) is assigned ID 1, and so on, and the lowest drive is assigned ID 6.