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DC8151101-00 C 1-1
Section 1
Introduction
NOTE: This installation guide applies to the following QLogic host adapter boards,
collectively referred to as the QLA12160 board unless otherwise noted:
■ QLA12160/33 (DC8110402-06)
■ QLA12160/66 (DC8110402-07)
The QLA12160 board (wide, low voltage differential [LVD]), dual port,
Ultra3, 64-bit PCI) contains the ISP12160A/33 or ISP12160A/66 chip.
1.1
Product Description
The QLA12160 board is an intelligent, high-performance, DMA bus master SCSI
host adapter designed for high-end systems. The intelligence and performance are
derived from the ISP chip, making the QLA12160 board a high performance host
adapter. The ISP chip combines a powerful RISC processor, two SCSI executive
processors (SXPs), and a peripheral component interconnect (PCI) local bus
interface in a single-chip solution. The QLA12160 board supports bootable devices
(hard disk drives and CD-ROM drives) and can be used with tape drives and other
SCSI devices. Installation of the QLA12160 board is quick and easy.
The QLA12160 board is for use only with UL listed computers that have detailed
instructions for user installation of accessory cards.
The QLA12160 board is designed to operate with multiple data transfer speeds
under SCSI specifications (see table 1-1).
NOTE: Only single-ended and LVD devices (Ultra2 and Ultra3) can be connected
to the QLA12160 board.
Table 1-1. SCSI Data Transfer Rates
SCSI Mode
Maximum Data Rate
Narrow (8-bit)
Maximum Data Rate
Wide (16-bit)
SCSI (or parallel SCSI) 5 MBps (asynchronous) —
Fast SCSI 10 MBps 20 MBps
Ultra SCSI 20 MBps 40 MBps
Ultra2, LVD SCSI 40 MBps 80 MBps
Ultra3, LVD SCSI 80 MBps 160 MBps