HP DC5000 4.3Drive Installation Guidelines, Single-DriveCable, Two-DriveCable

Ultra ATA Drive Guidelines and Features

Single-Drive Cable

System		Device 0
Board		(master)
	Blue	Black
	Face	Face

Two-Drive Cable

System		Device 1	Device 0
Board		(slave)	(master)
	Blue	Gray	Black
	Face	Face	Face

On a two-drive cable, the Drive/Device 0 connector is always the farthest one from the system board connector and the Drive/Device 1 connector is always the closest to the system board connector.

✎Some cables may be labeled “Drive 0” instead of “Device 0” and “Drive 1” instead of “Device 1”.

4.3Drive Installation Guidelines

Most computer system boards have two ATA (IDE) controller channels with a dedicated connector for each controller. One controller is designated as the primary and the other as the secondary controller.

Each of the two controllers can have up to two devices attached to it. Each computer system may therefore have a maximum of four ATA/ATAPI drives. All drives are connected to these controllers using an industry-standard 80-conductor cable.

✎The industry standard 1.44 MB diskette drive has its own separate channel and is not included as a part of the maximum four drives.

Any drive attached to a controller must have a drive designation. If only a single drive is connected to a controller and its jumper is in the cable-select position, it is designated as the Master Drive (Drive/Device 0) by its attachment to the Drive/Device 0 cable position. If two cable-selected drives are connected to a single controller, one will be designated by its attachment to the cable as the Master (Drive/Device 0) and the other as Slave (Drive/Device 1).

For optimal performance of a computer system, all drives need to be attached to the ATA controllers in a specified sequence. This sequence is determined by the device class of the drives and by specific attach sequence rules.

4–2 360201-002 Service Reference Guide, dc5000