DRIVE INSTALLATION GUIDELINES 151
Appendix C
*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 attach sequence rule can also be stated in table format:
The rules allow for:
Keeping the hard drive on a separate controller channel maximizes drive performance until a fourth device is
added.
Keeping the hard drives and removable media drives on separate controller channels maximizes compatibility.
Keeping the hard drive and the writable optical drive on separate controller channels maximizes optical drive
reliability.
Attach Sequence Worksheet
Use the worksheet below for obtaining optimum system performance when setting up a workstation with multiple
drives. Use the General Attach Sequence Rule to determine the best drive installation sequence.
Two examples of how to use the worksheet are:
Three device installation
Four device installation
Example 1: Three Device Installation Sample
Table C-2 General Attach Sequence Rule*
Sequence Description
1 The lowest class drive—bootable hard drive recommended.
2 If only two drives, the last drive goes here; otherwise, the lowest class of the remaining drives.
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.
Table C-3 Attach Sequence Worksheet
Device Name Device Class Position
Number
Controller Name Device
Number
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