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Compaq Deskpro 1000 Series of Personal Computers C-1
appendix
C
H
ARD
D
RIVES
Compaq Computer Corporation uses IDE hard disk drives that conform to two different
primary/secondary implementations. These are Conner mode and ATA-compatible mode. These
two modes are incompatible with one another.
Device 0/Device 1 Relationship
A device 0/device 1 relationship exists when there are two hard drives connected to a single port.
In this situation, one drive must be designated as the device 0, or primary, drive and the other as
the device 1, or secondary, drive. This designation is necessary because both drives cannot work
simultaneously.
Cable Select
The Compaq Deskpro 1000 Series of Personal Computers uses cable-select technology for
identifying Device 0 (primary) and Device 1 (secondary) IDE hard drives. Check that the jumpers
on the IDE hard drive are set properly for cable-select installation. Always check the label on the
drives or check Chapter 6 of this manual when a new drive is added to verify that the jumper
settings are set correctly.
Cable select may not function properly if drives other than those supported by Compaq are
installed.
The second drive on a cable-select cable can be a CD-ROM drive. However, the CD-ROM
drive must be installed in the device 1 position if a hard drive is installed on the same
cable. Ensure that both drives are set for cable-select configuration. See Chapter 6 for more
information.
If two drives are already connected to the primary IDE controller and an additional drive is
to be installed, the secondary IDE controller must be enabled. The secondary IDE
controller can be enabled by checking this option after opening the Advanced box in the
Mass Storage group of F10 Computer Setup. See Chapter 7 for more information.
When more than two drives are installed, drive performances are best when the two faster
drives are connected to the primary IDE controller and the slower drive is connected to the
secondary IDE controller.
A hard drive is installed and configured more quickly when it has first been formatted.
If your new drive includes the cable-select feature, no jumper setting changes are required.
Refer to the documentation supplied with the cable for instructions on using the cable
select feature. If you install a third-party hard drive, you will need to purchase a jumper
cable (spare part number 247568-001) from Compaq Computer Corporation.
IntelliSafe - SMART
The IntelliSafe IDE hard drives for the Compaq Deskpro 1000 Series of Personal Computers have
built-in drive failure prediction that warns the user or the network administrator of an impending
failure or crash of the hard drive.