Pata Additional Drive Application Notes - HP Compaq dc7100 DT Reference Manual

Example 2: Four-Device Installation Sample
A system has four devices: two Ultra ATA-100 hard drives, one DVD-CDR/W drive, and a
ZIP-250 drive. Using the Device Class Table in Section 4.3.1, the devices may be reidentified as:
Ultra ATA-100 hard drive = Class 1
Ultra ATA-100 hard drive = Class 1
DVD-CDR/W drive = Class 2
ZIP-250 drive = Class 4
Attach Sequence Worksheet—Four-Device Installation (Sample)
Device Name
Ultra ATA-100 hard drive
DVD-CDR/W drive
ZIP-250 drive
Ultra ATA-100 hard
drive*
*If there are three or more devices, two or more of which are hard drives, two hard drives should
be attached to the primary channel first before following the General Attach Sequence Rule.
Cable lengths may restrict drive usage.

4.3.4 PATA Additional Drive Application Notes

When replacing a hard drive, the replacement should be of the same type (Ultra ATA -33,
-66, or -100) as that being removed to retain the same level of performance.
When Ultra ATA and SCSI hard drives are mixed in the same system, the Ultra ATA drive
will become the boot drive unless the boot order is changed in Computer (F10) Setup.
Service Reference Guide, dc7100
Device
Class
1
2
4
1
4
3
Primary
Channel*
Secondary
Channel
361288-003
Serial and Parallel ATA Drive Guidelines and Features
Position Channel
Number Name
Primary
1
Secondary
2
Secondary
3
Primary
4
1
2
4 1
3 2
Device 1 Device 0
Device
Number
0
0
1
1
4–9