Dell Precision 330 - Manual (Page 92)

92 Installing Upgrades
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To locate the EIDE interface connectors on the system board, see " System
Board Components ." Each EIDE interface connector on the system board
supports the following:
• Two channels, master and slave
• Logical block addressing (LBA)
• PIO Mode 3 and Mode 4
• Ultra Advanced Technology Attachment (ATA)/100 (backward-
compatible with ATA/66 and ATA/33)
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
system. To install a SCSI device, you must have a SCSI controller card
installed in your system.
SCSI ID Numbers
Internal SCSI devices must have a unique SCSI ID number from 0 to 15.
When SCSI devices are shipped from Dell, the default SCSI ID numbers
for the primary and secondary controllers are assigned as follows:
• SCSI controller: SCSI ID 7
• Boot SCSI hard drive: SCSI ID 0
• SCSI CD drive: SCSI ID 5
• SCSI tape or digital audio tape (DAT) drive: SCSI ID 6