B
Hard Drive Installation Guidelines
Using the Cable-Select Feature with Ultra ATA Devices
Optional drives are available from Compaq 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 (primary drive) or device 1 (secondary 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.
Hardware Reference Guide | B–1 |