Dell PRECISION 530 - Manual (Page 106)

106 Removing and Installing Parts
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EIDE Cables
To transfer data at full speed, Ultra ATA/100 hard drives require an 80-
conductor cable like that used with ATA/66 drives. The 80-conductor cable
has a 40-pin connector like the ATA/33 cable, but it has twice as many wires
within the cable. If you use an ATA/33 cable with Ultra ATA/100 hard drives,
the drives will operate properly, but data will transfer at ATA/33 speeds.
NOTICE: Dell recommends that you use only EIDE cables purchased from
Dell. Cables purchased elsewhere are not guaranteed to work with Dell
computers.
SCSI Device Installation Guidelines
This section describes how to configure and install SCSI devices in your
computer. To install a SCSI device, you can use one or both of the following
SCSI controllers:
• The SCSI connector on the system board. To locate the SCSI system
board connector, see " System Board Components " or the interior service
label.
NOTE: The system board SCSI controller will support hard drives only.
Do not connect CD or DVD drives, tape drives, DAT drives, and so on.
• A SCSI controller card installed in your computer.
SCSI ID Numbers
Internal SCSI devices must have a unique SCSI ID number from 0 to 15. If
you are using the SCSI connector on the system board and a SCSI
controller card installed in your computer, you will have two separate SCSI
buses operating. Each SCSI bus will have a set of SCSI ID numbers from 0
to 15.
When SCSI devices are shipped from Dell, the default SCSI ID numbers
for are assigned as follows: