HP Xw8400 HP xw8400 Workstation - Service and Technical Reference Guide - Page 155

Table C-2 General attach sequence rule (continued) Sequence Description 3 If only three drives, attach the final drive here. If a fourth drive exists, attach the lowest class drive here. 4 If there is a fourth drive, attach the final drive here-the drive with the highest class number of all devices. If there are three or more devices, two or more of which are hard drives, two hard drives should be attached to the primary controller first before following the general attach sequence rule. The rules allow for: ● Keep the hard drive on a separate controller channel to maximize drive performance until a fourth device is added. ● Keep the hard drives and removable media drives on separate controller channels to maximize compatibility. ● Keep the hard drive and the writable optical drive on separate controller channels to maximize optical drive reliability. Attach sequence worksheet Use the worksheet below to obtain optimum system performance when setting up a workstation with multiple drives. Use the general attach sequence rule to determine the best drive installation sequence. Table C-3 Attach sequence worksheet Device name Device class Position number Controller name Device number Two examples of how to use the worksheet are: ● Three device installation ● Four device installation Example 1: Three device installation sample A system has three devices: Ultra ATA-100 hard drive, CD-ROM drive, and a DVD drive. Using the Device Class Table, the devices can be identified as: ● Ultra ATA-100 hard drive = Class 1 ● DVD drive = Class 2 ● CD-ROM drive = Class 3 Table C-4 Attach sequence worksheet-Three device installation (sample) Devicen ame Device class Position number Controller name Device number Ultra ATA-100 hard drive 1 1 Primary 0 ENWW Drive installation guidelines 145