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
Table C-2 General attach sequence rule (continued)
ENWW Drive installation guidelines 145
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