DECpc AXP 150 and DEC 2000 Model 300 AXP Adaptec AHA-1742A SCSI Adapter User Information 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: Digital Equipment Corporation Maynard, Massachusetts This is a new manual.
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.
Contents Preface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . v 1 Installing the SCSI Adapter Introduction . . . . . . . . . . . . . . . . . . . . . . . About the AHA-1742A SCSI Adapter . . . . In This Chapter . . . . . . . . . . . . . . . . . . . . Preparing to Install the SCSI Adapter . . . . . . Before You Begin . . . . . . . . . . . . . . . . . . . Disabling the Floppy Controller . . . . . . . . . . . Disabling the Floppy Controller . . . .
3 Troubleshooting Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Identifying and Solving Problems . . . . . . . . . . . . . . . . . . . . . 3–1 3–1 A Specifications Introduction . . . . . . . . . . . . . . . . . . . . In This Appendix . . . . . . . . . . . . . . . . SCSI Adapter Specification . . . . . . . . . . . SCSI Adapter Specification Summary SCSI Port Pin Specification . . . . . . . . . . . Summary . . . . . . . . . . . . . . . . . . . . . .
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.
Conventions vi 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. n A lowercase italic n indicates the generic use of a number.
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.
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.
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.
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.
Installing the SCSI Adapter Installing the SCSI Adapter Installation Procedure When you have performed the tasks described in the section entitled Preparing to Install the SCSI Adapter , you are ready to install the SCSI adapter. For information on opening the system unit and installing an option board see the DECpc AXP 150 and DEC 2000 Model 300 AXP Customer Technical Information manual.
Connecting External SCSI Devices Connecting External SCSI Devices Connection Procedure You must connect all external SCSI devices to the system unit before system power-up. Table 1–2 describes how to connect an external SCSI device to the system. Table 1–2 Connecting External Devices Step Action 1 Hold in both connector clips on one end of the SCSI cable and connect it to the SCSI port on the system unit, then release the clips. 2 Connect the other end of the SCSI cable to the SCSI device.
Connecting External SCSI Devices Connection Illustration Figure 1–3 shows how to connect the SCSI device to the system unit.
Connecting External SCSI Devices Table 1–3 lists the steps that you must follow to test the SCSI connection. Testing the SCSI Connection Table 1–3 Testing the SCSI Connection Using the SHOW DEVICE Display Step Action Result 1 Enter the SHOW DEVICE command ( ) to display the SCSI configuration. The system responds with a display similar to Example 1–1. 2 Examine the BOOTDEV column ( ) to make sure that all the devices are listed.
2 Configuring the SCSI Adapter Introduction This chapter describes how to configure the system after you have installed the AHA-1742A SCSI adapter.
EISA Configuration Utility (ECU) EISA Configuration Utility (ECU) Running the ECU To configure the Ethernet controller within the system or to change the configuration settings, you must run the ECU. See the DECpc AXP 150 and DEC 2000 Model 300 AXP Customer Technical Information manual for information on running the ECU. Changing the Configuration You can use the ECU to change the configuration of the SCSI adapter.
EISA Configuration Utility (ECU) Default Configuration Table 2–2 shows the default configuration settings for the AHA-1742A SCSI adapter.
3 Troubleshooting Summary This section describes some of the problems that can occur with the AHA-1742A SCSI adapter. It suggests possible causes for the problems and actions that you can take to correct them. Identifying and Solving Problems Table 3–1 describes how to identify and solve problems by interpreting correctly the symptoms that are occurring.
Troubleshooting Table 3–1 (Cont.) Troubleshooting Table Symptom The SHOW DEVICE display does not include the floppy disk. You cannot read or write from a SCSI device. System displays a SCSI device error. Possible Cause Recommended Action The SCSI cable or device is faulty. Replace the SCSI cable or device. See the DECpc AXP 150 and DEC 2000 Model 300 AXP Customer Technical Information for more information on replacing cables and devices.
Troubleshooting Table 3–1 (Cont.) Troubleshooting Table Symptom Possible Cause Recommended Action The SCSI adapter is faulty. See the DECpc AXP 150 and DEC 2000 Model 300 AXP Customer Technical Information for information on testing the SCSI adapter. The error code could be a system error code. See the DECpc AXP 150 and DEC 2000 Model 300 AXP Customer Technical Information for more information. If the problem persists, contact your system administrator.
A Specifications Introduction This appendix lists the specifications for the AHA-1742A SCSI adapter and the SCSI port.
SCSI Adapter Specification SCSI Adapter Specification SCSI Adapter Specification Summary Table A–1 lists the physical specifications for the AHA-1742A SCSI adapter. Table A–1 Specification Table Power Requirements DC Amps @ 5V ± 0.25V 2.
SCSI Port Pin Specification SCSI Port Pin Specification Summary This section lists the pin specifications for the SCSI port. SCSI Port Illustration Figure A–1 shows the pin numbers on the SCSI port. Figure A–1 SCSI Port 25 1 50 26 GA_EN00290A_93A SCSI Port Pin Specification Table A–2 describes the functions of the pins on the SCSI port.
SCSI Port Pin Specification Table A–2 (Cont.
Index C Configuring the SCSI adapter changing the configuration, 2–2 configuration settings, 2–2 running the ECU, 2–2 Specifications SCSI adapter specification, A–2 SCSI port pin specification, A–3 T Troubleshooting, 3–1 E EISA Configuration Utility, 2–2 External SCSI devices, 1–2 connecting, 1–6 testing the connection, 1–8 F Floppy controller, 1–2 disabling, 1–3 I Installing the SCSI adapter installation procedure, 1–5 preparation, 1–2 Internal SCSI devices, 1–2 S SCSI devices external, 1–2 internal,
