Digital Equipment DECpc AXP 150 Operation manual

DECpcAXP150and
DEC2000Model300AXP
AdaptecAHA-1742ASCSIAdapter
UserInformation
Order Number: EK-A0652-UG.001
July 1993
This manual describes how to install, configure, and use the Adaptec
AHA-1742A SCSI adapter for the DEC 2000 Model 300 AXP and DECpc
AXP 150 systems.
Revision Information: This is a new manual.
Digital Equipment Corporation
Maynard, Massachusetts

First Printing, July 1993
Possession, use, or copying of the software described in this documentation is
authorized only pursuant to a valid written license from Digital, an authorized,
sublicensor, or the identified licensor.
While Digital believes the information included in this publication is correct as
of the date of publication, it is subject to change without notice.
Digital Equipment Corporation makes no representations that the
interconnection of its products in the manner described in this document
will not infringe existing or future patent rights, nor do the descriptions
contained in this document imply the granting of licenses to make, use, or sell
equipment or software in accordance with the description.
© Digital Equipment Corporation 1993.
All Rights Reserved.
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your critical evaluation to assist in preparing future documentation.
The following are trademarks of Digital Equipment Corporation: AXP,
DEC, DECpc, Digital, OpenVMS, VAX DOCUMENT, the AXP logo, and
the DIGITAL logo.
OSF/1 is a registered trademark of the Open Software Foundation, Inc.
All other trademarks and registered trademarks are the property of their
respective holders.
This document was prepared using VAX DOCUMENT, Version 2.1.

Contents
Preface ..................................................... v
1 Installing the SCSI Adapter
Introduction . . . ................................... 1–1
About the AHA-1742A SCSI Adapter ................... 1–1
In This Chapter ................................... 1–1
Preparing to Install the SCSI Adapter . . ................... 1–2
Before You Begin .................................. 1–2
Disabling the Floppy Controller .......................... 1–3
Disabling the Floppy Controller ....................... 1–3
Removing the Onboard SCSI Terminators .................. 1–4
Removing the Onboard SCSI Terminators ............... 1–4
Installing the SCSI Adapter. . ........................... 1–5
Installation Procedure . . . ........................... 1–5
Connecting External SCSI Devices ....................... 1–6
Connection Procedure . . . ........................... 1–6
Connection Illustration . . ........................... 1–7
Testing the SCSI Connection ......................... 1–8
Updated SHOW DEVICE Display . . ................... 1–8
2 Configuring the SCSI Adapter
Introduction . . . ................................... 2–1
In This Chapter ................................... 2–1
EISA Configuration Utility (ECU) ........................ 2–2
Running the ECU ................................. 2–2
Changing the Configuration .......................... 2–2
Default Configuration . . . ........................... 2–3
iii

3 Troubleshooting
Summary ........................................ 3–1
Identifying and Solving Problems ..................... 3–1
A Specifications
Introduction ...................................... A–1
In This Appendix . . ................................ A–1
SCSI Adapter Specification ............................. A–2
SCSI Adapter Specification Summary . . ................ A–2
SCSI Port Pin Specification ............................. A–3
Summary ........................................ A–3
SCSI Port Illustration .............................. A–3
SCSI Port Pin Specification . . ........................ A–3
Index
Examples
1–1 Updated SHOW DEVICE Display ..................... 1–8
Figures
1–1 Disabling the Floppy Controller ....................... 1–3
1–2 Removing the SCSI Terminators ...................... 1–4
1–3 Connecting an External SCSI Device . . . ................ 1–7
A–1 SCSI Port ........................................ A–3
Tables
1–1 Preinstallation Procedure............................ 1–2
1–2 Connecting External Devices . ........................ 1–6
1–3 Testing the SCSI Connection Using the SHOW DEVICE
Display . . ........................................ 1–8
2–1 Configuration Settings .............................. 2–2
2–2 Default Configuration .............................. 2–3
3–1 Troubleshooting Table .............................. 3–1
A–1 Specification Table . ................................ A–2
A–2 SCSI Port Pin Specification . . ........................ A–3
iv

Preface
Purpose of This
Manual This manual describes how to install, configure, and use the
Adaptec AHA-1742A SCSI adapter in the DEC™ 2000 Model 300
AXP™ or DECpc™ AXP 150 systems.
Audience This manual is intended for anyone installing, configuring, or
using the Adaptec AHA-1742A SCSI adapter in the DEC 2000
Model 300 AXP or DECpc AXP 150 systems. It is written for
both experienced and inexperienced users.
Structure of
This Manual This manual contains three chapters, an appendix, and an index
as follows:
• Chapter 1 describes how to install and use the SCSI adapter.
• Chapter 2 describes how to configure the SCSI adapter.
• Chapter 3 contains troubleshooting information.
• Appendix A lists the specifications for the SCSI adapter.
• The index is a reference to the main topics in the manual.
Associated
Information See the DECpc AXP 150 and DEC 2000 Model 300 AXP
Customer Technical Information manual for associated
information.
v

Conventions The following conventions are used in this manual:
Convention Description
monospace Text displayed on the screen is shown in
monospace type.
italic type Italic type emphasizes important information,
indicates variables, and indicates complete
titles of manuals.
n.nn A period in numerals signals the decimal point
indicator. For example, 1.75 equals one and
three-fourths.
UPPERCASE Words in uppercase indicate a command.
nA lowercase italic nindicates the generic use
of a number. For example, 19nn indicates a
4-digit number in which the last 2 digits are
unknown.
Note A note contains information of special
importance to the reader.
Caution A caution contains information to prevent
damage to the equipment.
vi

1
Installing the SCSI Adapter
Introduction This chapter describes how to install and connect the
AHA-1742A SCSI adapter.
About the
AHA-1742A
SCSI Adapter
The AHA-1742A SCSI adapter provides a diskette drive
controller and it allows you to connect up to seven SCSI devices,
either internal or external, to the system.
In This Chapter This chapter contains the following sections:
• Preparing to Install the SCSI Adapter
• Disabling the Floppy Controller
• Removing the Onboard SCSI Terminators
• Installing the SCSI Adapter
• Connecting External SCSI Devices
Installing the SCSI Adapter 1–1

Preparing to Install the SCSI Adapter
Preparing to Install the SCSI Adapter
Before You
Begin Before you install the AHA-1742A SCSI adapter, you must
determine if it is the first or the second SCSI adapter in the
system. If it is the second SCSI adapter in the system, you must
disable the floppy disk controller. You must also decide whether
you are using the SCSI adapter to connect internal or external
SCSI devices to the system. Table 1–1 describes the actions you
should take.
Table 1–1 Preinstallation Procedure
Adapter Internal Devices External Devices
First No action required. If you are ready to connect the external SCSI
devices immediately after installing the SCSI
adapter, remove the terminators from the SCSI
adapter. See the section entitled Removing the
Onboard SCSI Terminators for information on
removing the terminators.
Second No internal device
connections permitted. If you are connecting external devices, do the following:
1. Disable the floppy controller on the SCSI
adapter. See the section entitled Disabling
the Floppy Controller for information on
disabling the floppy controller.
2. If you are ready to connect the external SCSI
devices immediately after installing the
SCSI adapter, remove the terminators from
the SCSI adapter. See the section entitled
Removing the Onboard SCSI Terminators for
information on removing the terminators.
1–2 Installing the SCSI Adapter

Disabling the Floppy Controller
Disabling the Floppy Controller
Disabling
the Floppy
Controller
If you are installing a second SCSI adapter in the system, you
must disable the floppy disk controller on the second SCSI
adapter. To disable the floppy controller, remove the jumper from
pin number 1 of J6 on the SCSI adapter. Figure 1–1 shows the
default position of the jumper.
Figure 1–1 Disabling the Floppy Controller
GA_EN00500A_93A
123456
J6
Installing the SCSI Adapter 1–3

Removing the Onboard SCSI Terminators
Removing the Onboard SCSI Terminators
Removing the
Onboard SCSI
Terminators
If you want to connect external SCSI devices to the system unit,
you must remove the three onboard SCSI terminators from
the SCSI adapter. Figure 1–2 shows how to remove the SCSI
terminators ( ! ) from the SCSI adapter.
Figure 1–2 Removing the SCSI Terminators
GA_EN00501A_93A
1
1–4 Installing the SCSI Adapter