User's Guide

1-2
Adaptec SCSI Card 39320D User’s Guide for Floppy Disks (OEM)
The Adaptec SCSI Card 39320D has two independent SCSI
channels, each with a maximum throughput of 320 MB/sec.
■ SCSI Channel A—(marked CH A on the card) has one internal
connector and one external connector.
■ SCSI Channel B—(marked CH B on the card) has one external
connector.
For the best data I/O performance, connect only LVD (Low Voltage
Differential) devices and LVD cables to the Adaptec SCSI Card
39320D. (LVD devices means Ultra 320, Ultra160, and Ultra2 SCSI
devices.) If you connect non-LVD devices (for example, Fast SCSI
or Ultra SCSI devices), we recommend that you connect them to
SCSI Channel B. This allows you to operate LVD SCSI devices at
their maximum speed on Channel Awhile at the same time using
non-LVD SCSI devices on Channel B.
Although the Adaptec SCSI Card 39320D is a 64-bit PCI card, it also
works in a 32-bit PCI slot. When installed in a 32-bit PCI slot, the
card automatically runs in the slower 32-bit mode.
This User’s Guide provides information about using the Adaptec
SCSI Card 39320D and SCSI devices, troubleshooting, SCSI
termination, and other important topics. It explains how to use the
built-in SCSISelect
®
utility if you need to change the Adaptec SCSI
Card 39320D settings. It also explains how to install the software
device drivers for your operating system.
Note: Read the Adaptec SCSI Card 39320D Installation Guide if
you need instructions on installing the SCSI Card and
connecting SCSI devices to it.
ASC-39320D UG.book Page 2 Monday, July 22, 2002 1:42 PM