Compaq 470007-802 Deskpro EN Hardware Reference Guide -- Slim Desktop Models - Page 31
Hard Drive Installation Guidelines, Using the Cable-Select Feature with Ultra ATA Devices
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appendix 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 drives employs a cable-select feature that identifies the drives as device 0 (primary drive) or device 1 (secondary drive). The computer recognizes device 0 as the drive connected to the short segment of the drive cable (farthest from the system board), and device 1 as the drive connected to the long segment of the drive cable (closest to the system board). When using an 80 conductor Ultra ATA cable, connect the colored connectors as follows: blue-system board (end) gray-device 1 (middle) black-device 0 (end) Drive installation requires no jumper setting changes on the existing or optional drives. All Compaq drives have the jumpers preset for cable- select installation. 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