Adaptec 3940UW User's Guide download pdf (Page 13)

AHA-3940U/3940UW/3940UWD User’s Guide

Stock Number: 511041-00, Rev. B Page: 1-1

Print Spec Number: 494569-00

Current Date: 2/14/97 ECN Date: 2/17/97

1-1

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Introduction

The Adaptec



AHA



-3940U, AHA-3940UW, and AHA-3940UWD

MultiChannel PCI-to-UltraSCSI Host Adapters are designed for use

in computers that have 5-volt Peripheral Component Interconnect

(PCI) interface slots. PCI is a local bus interface that enables high-

speed data transfer. Your computer must be PCI

Rev. 2.1-compliant and the motherboard BIOS must support PCI-to-

PCI Bridges. If you aren’t sure whether the motherboard BIOS

supports PCI-to-PCI Bridges, contact the motherboard vendor.

Each AHA-3940U/3940UW/3940UWD host adapter has two SCSI

channels, each of which functions

independent host adapter

■

With the AHA-3940U, you can connect up to seven 8-bit SCSI

devices per channel.

■

With the AHA-3940UW/3940UWD, you can connect up to

fifteen 16-bit (Wide) SCSI devices per channel. Using a 68-pin-

to-50-pin converter, you can also combine 8-bit and 16-bit SCSI

devices, up to 15 per channel; up to seven can be 8-bit devices.

The AHA-3940U is an 8-bit PCI-to-UltraSCSI host adapter with two

internal connectors and one external connector. The AHA-3940UW

is a 16-bit PCI-to-UltraSCSI host adapter with two internal connec-

tors and one external connector. The AHA-3940UWD is a 16-bit PCI-

to-UltraSCSI host adapter with two internal connectors and two

external connectors.

This document uses the term AHA-3940U/3940UW/3940UWD to

refer to all three host adapter models.

This

User’s Guide

is a companion to the

Installation Guide

for the

AHA-3940U/3940UW/3940UWD host adapters. Both guides

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