B
Hard Drive Installation Guidelines
Using the Cable-Select Feature with Ultra ATA
Devices
Optional drives are available from HP in kits that include a special drive cable. The
configuration of the drive employs a cable-select feature that identifies the drive as
device 0 (master drive) or device 1 (slave drive).
Device 1 is the drive connected to the cable’s middle connector.
Device 0 is the drive connected to the cable’s end connector (applies only to
80-conductor ATA cables). See “Guidelines for Installing Ultra ATA Devices” in
this appendix for an example of an Ultra ATA cable.
Compaq hard drives ship with jumpers preset to cable-select mode; therefore, no
jumper setting changes on the existing or optional drives are required. If you
purchase a third-party hard drive, refer to the documentation included with the kit to
ensure proper installation and configuration of cables.
If installing a second device on the primary controller, you must use an 80-conductor
Ultra ATA cable for optimal performance. This cable is standard on select models.
Guidelines for Installing Ultra ATA Devices
When installing additional Ultra ATA drives, follow these guidelines:
If using mulitple Ultra ATA devices, HP recommends that the devices be split
between the primary and secondary Ultra ATA channels for optimum
performance. Use an additional Ultra ATA cable to connect the additional device
to the system board.
Hardware Reference Guide
B-1
