Alpha Microsystems SCSI Manuel utilisateur

RIGHT. FROM THE START

SCSI

Disk Drives

Installation Instructions

PDI-00436-20,Rev.A15

1995 Alpha Microsystems

REVISIONS INCORPORATED

REVISION DATE

00 Mar. 1990

01 Apr. 1990

02 May 1991

03 July 1991

04 Aug. 1991

05 Sept. 1991

06 Jan. 1992

07 Apr. 1992

08 July 1992

09 Dec. 1992

10 Jan. 1993

11 Mar. 1993

12 Apr. 1993

13 Sept. 1993

14 Nov. 1993

15 Dec. 1993

SCSI Disk Drives Installation Instructions

To re-order this document, request part number PDI-00436-20.

The information contained in this manual is believed to be accurate and reliable. However, no

responsibility for the accuracy, completeness or use of this information is assumed by Alpha

Microsystems.

This document may contain references to products covered under U.S. Patent Number 4,530,048.

The following are registered trademarks of Alpha Microsystems, Santa Ana, CA 92799:

AMIGOS AMOS Alpha Micro AlphaACCOUNTING

AlphaBASIC AlphaCALC AlphaCOBOL AlphaFORTRAN 77

AlphaLAN AlphaLEDGER AlphaMAIL AlphaMATE

AlphaNET AlphaPASCAL AlphaRJE AlphaWRITE

CASELODE OmniBASIC VER-A-TEL VIDEOTRAX

The following are trademarks of Alpha Microsystems, Santa Ana, CA 92799:

AlphaBASIC PLUS AlphaVUE AM-PC AMTEC

DART ESP MULTI inSight/am

inFront/am

All other copyrights and trademarks are the property of their respective holders.

ALPHA MICROSYSTEMS

2722 S. Fairview Street

P.O. Box 25059

Santa Ana, CA 92799

Page iInstallation Instructions: SCSI Disk Drives

TABLE OF CONTENTS

1.0 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

2.0 PRODUCT DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

3.0 TOOLS REQUIRED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

4.0 HANDLING SCSI DISK DRIVES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

5.0 CONFIGURING YOUR SCSI DISK DRIVE . . . . . . . . . . . . . . . . . . . . . . . . . . 2

6.0 SCSI TERMINATION USING EXTERNAL TERMINATOR OPTION . . . . . . 3

6.1 Termination Procedure (Without External Terminator) . . . . . . . . . . . 4

7.0 TERMINATOR POWER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

8.0 SCSI DRIVE INSTALLATION (AM-1400/1600 COMPUTERS) . . . . . . . . . . . 6

8.1 Getting Started . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

9.0 SCSI 3-1/2" DRIVES IN 5-1/4" MOUNTING CONFIGURATIONS . . . . . . . . 7

9.1 3-1/2" SCSI Drives in Series 90 Computers . . . . . . . . . . . . . . . . . . . 10

10.0 ISOLATING SIGNAL AND CHASSIS GROUNDS . . . . . . . . . . . . . . . . . . . . 11

10.1 Testing for AC to DC Ground Shorts Using an Ohm Meter . . . . . . . . 11

10.2 Drive Isolation (AM-1400/1600 Computers) . . . . . . . . . . . . . . . . . . . 13

10.3 Drive Isolation (Pedestal and Rack Mount Computers) . . . . . . . . . . . 14

10.4 Drive isolation (AM-990 Universal VME Enclosure) . . . . . . . . . . . . . 15

11.0 FORMATTING YOUR SCSI DISK DRIVE . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

APPENDIX A - CONFIGURING AMOS SCSI DISK DRIVES

A.1 BOOTING FROM A SCSI DRIVE (AMOS ONLY) . . . . . . . . . . . . . . . A-1

A.1.1 Loading the Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1

A.1.2 SCSI Drivers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-3

A.1.3 MONGEN the Monitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-3

A.1.4 System Initialization Command File . . . . . . . . . . . . . . . . . . . . A-3

A.1.5 Ready to Boot . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-4

A.2 INITIAL SYSTEM TESTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-5

A.3 OTHER DOCUMENTATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-6

PDI-00436-20, Rev. A15

Page ii Installation Instructions: SCSI Disk Drives

APPENDIX B - AM-436-20 (40MB) AND AM-436-21 (80MB) SCSI DRIVES

APPENDIX C - AM-436-25 (-01) 120MB SCSI DRIVE

APPENDIX D - AM-436-24 (-13) 203MB SCSI DRIVE

APPENDIX E - AM-436-15 (-23) 324MB SCSI DRIVE

APPENDIX F - AM-436-20 (-00) 40MB AND AM-436-21 (-11) 80MB SCSI DRIVES

APPENDIX G - AM-436-20 (-00) 40MB AND AM-436-21 (-11) 80MB SCSI DRIVES

APPENDIX H - AM-436-29 (-19) 234MB AND AM-436-26 (-14) 203MB SCSI DRIVES

APPENDIX I - AM-436-30 (-18) 324MB SCSI DRIVE

APPENDIX J - AM-436-44 1.2GB AND AM-436-45 540MB SCSI DRIVES

APPENDIX K - AM-436-06 (330MB) 5-1/4" SCSI DRIVE

APPENDIX L - AM-436-08 (638MB) 5-1/4" SCSI DRIVE

APPENDIX M - AM-436-08 (638MB) 5-1/4" SCSI DRIVE

APPENDIX N - AM-436-16 (1.2GB) 5-1/4" SCSI DRIVE (PCBA# 1027614)

APPENDIX O - AM-436-16 (1.2GB) 5-1/4" SCSI DRIVE (PCBA# 1027341)

PDI-00436-20, Rev. A15

Page 1Installation Instructions: SCSI Disk Drives

1.0INTRODUCTION

This document describes the installation of both 3-1/2" and 5-1/4" SCSI disk drives into

an Alpha Micro computer. It is written for the experienced Alpha Micro Service

Technician, so if you do not feel comfortable performing the hardware and software

procedures discussed in this document, please contact your Alpha Micro Dealer or the

Alpha Micro Technical Support Group for help.

Installing a SCSI disk drive is simply a matter of placing the drive inside your computer

chassis, connecting the appropriate power and interface cables, and configuring the

correct software. Those wishing to install a SCSI drive into an external subsystem

should refer to the installation instructions for the

AM-1601 Subsystem,

PDI-01601-00,

or the

SCSI Universal Subsystem

, PGI-00001-00.

This document contains information for each SCSI disk drive currently sold and

supported by Alpha Micro. This information includes drive addressing, terminator

locations, and other items unique to the various drive manufacturers.

2.0PRODUCT DESCRIPTION

The SCSI disk drive package consists of a SCSI disk drive and mounting kit. The

following table shows the storage capacity and the order number for SCSI drives

currently available from Alpha Micro:

DRIVE CAPACITY

PART NUMBER

for ordering

213MB

PDB-00436-26 (-14)

DRIVE

SIZE

3-1/2"

120MB

PDB-00436-25

3-1/2"

1.2GB

PDB-00436-44

3-1/2"

540MB

PDB-00436-45

3-1/2"

245MB

PDB-00436-29 (-19)

3-1/2"

345MB

PDB-00436-30 (-18)

3-1/2"

PDB-00436, (-44), (-45), (-14), (-18), and (-19) 3-1/2" disk drive kits are shipped with a

special 5-1/4" mounting bracket. These kits are applicable for Alpha Micro products that

support 5-1/4" SCSI disk drives, including Series 90 Computers.

PDI-00436-20, Rev. A15

Page 2 Installation Instructions: SCSI Disk Drives

3.0TOOLS REQUIRED

For most installations, the only tools you will need are:

A #2 phillips-head screwdriver.

A pair of needle-nose pliers, used for removing or installing SCSI drive ID

jumpers.

An ohm meter, used to verify the signal ground on the disk drive is not

shorted to chassis ground (not required in Series 90 Applications).

4.0HANDLING SCSI DISK DRIVES

Disk drives can be damaged easily when handled improperly:

1.Leave the SCSI drive in the anti-static bag it was shipped in until you are

ready to install it.

2.Never handle a disk drive unless you are properly grounded. This will

prevent a static charge from damaging the drive before you even have it

installed.

3.Disk drives are extremely sensitive to shock, especially when handled

outside the system environment. When setting a drive on a work bench,

exercise extreme caution; whenever possible try to set the drive on a

padded anti-static surface.

5.0CONFIGURING YOUR SCSI DISK DRIVE

There is a separate appendix for each manufacturer/model of SCSI drive sold and

supported by Alpha Micro in the back of this document. The drives are shown with their

jumpers configured as shipped from the factory. You should carefully go over the

information applicable to the SCSI drive you are installing. The illustrations also

highlight the differences in jumper configurations between AMOS and Series 90

applications. Most of the configuration information shown in the table above each disk

drive is applicable only when the drive is used with the AMOS operating system. The

"number of logicals", "bitmap size", and "format interleave" specifications are not

applicable to Series 90 computers.

SCSI disk drives used in AMOS 680X0 based computers must be installed with the

drive’s signal ground isolated from the computer’s chassis ground. Before installing

your new disk drive, see Section 10 (in this document) dealing with drive isolation in

AMOS based products.

PDI-00436-20, Rev. A15

Page 3Installation Instructions: SCSI Disk Drives

6.0SCSI TERMINATION USING EXTERNAL TERMINATOR OPTION

The preferred method of terminating the SCSI bus in an AMOS based computer is the

installation of an external terminator. In Early April of 1993, the external SCSI bus

terminator became standard on all AMOS based computer configurations. Using an

external terminator makes the task of installing an add-on subsystem (like a portable

CD-ROM drive) easier, eliminating the necessity of removing terminators from a SCSI

device located in the host computer.

External terminators are available from Alpha Micro under part number PRA-00222-00.

To use the external terminator, you need to insure none of your SCSI peripherals inside

the computer are terminated. You will also need to follow the guidelines in the section

on providing termination power for the SCSI bus.

If you have a 10 or 21-slot rack mount VME computer and want to install an external

terminator, you will need to order a special adapter cable, DWB-10200-01. The adapter

cable is required, because there is no external SCSI connector on these computers.

The special cable has a connector that is compatible with the external terminator and

would also allow easy access to your computer for a portable CD-ROM drive or other

SCSI subsystem.

The external terminator is shown in Figure 1:

SCSI

(PRA-00222-00)

EXTERNAL SCSI BUS

TERMINATOR

CONFIGURATION B

CONFIGURATION A

BAIL LOCKS

MAC821

#4 SCREW

AND WASHER

Figure 1. External Terminator Installation

PDI-00436-20, Rev. A15

Page 4 Installation Instructions: SCSI Disk Drives

Figure 1 shows two different types of external SCSI connectors.

1.Configuration"A" shows an extended external SCSI connector and bail

locks for holding the terminator in place. This configuration is used on

almost all of Alpha Micro’s currently available product. The terminator is

installed by sliding it over the connector and then latching the bail locks

into the notches in the terminator.

2.Configuration"B" shows a flush mounted external SCSI connector. The

only product Alpha Micro currently offers using a flush mounted external

SCSI connector is the pedestal (also known as the "Classic") chassis. In

this configuration, the terminator inserts into a cutout in the sheet metal

and over the SCSI connector. The terminator is held in place with two

#4screws and washers.

6.1Termination Procedure (Without External Terminator)

1.AM-14XX, AM-16XX, or pedestal computers with one SCSI hard disk drive

can have that hard disk drive installed with its terminators removed.

2.If an AM-14XX, AM-16XX, or pedestal computer has more than one SCSI

device, the last SCSI device, the device attached to the connector farthest

down the cable away from the CPU board must be terminated.

3.If an AM-14XX, AM-16XX, or pedestal computer includes a SCSI magnetic

tape drive as its only SCSI device, the tape drive must have its terminators

installed.

4.For AM-990, 10-slot rack mount VME, and 21-slot rack mount VME

computers, the last SCSI device attached to the connector farthest down

the cable away from the CPU board must have its terminators installed. If

only one SCSI device is installed, that device must be terminated.

5.For subsystem installations, the last SCSI device attached to the

connector farthest down the cable away from the host computer must have

its terminators installed.

AM-1000 and AM-1200 computers follow the same termination procedure used by

AM-14XX, AM-16XX, and pedestal computers.

PDI-00436-20, Rev. A15

Page 5Installation Instructions: SCSI Disk Drives

7.0TERMINATOR POWER

In order to properly terminate the SCSI bus, one of the SCSI peripherals must be

configured to supply termination power to the SCSI bus.

Use the following guidelines to determine which peripheral will be used to supply

termination power for the SCSI bus:

1.Whenever possible, only one SCSI peripheral will be configured to supply

termination power to the SCSI bus.

2.If a computer has more than one SCSI peripheral and at least one of those

peripherals is a disk drive, one disk drive will be configured to supply

termination power to the bus. The other disk or tape SCSI devices will be

configured so they do not supply termination power.

3.If a computer does not have a SCSI disk drive, but does have one or more

SCSI magnetic tape or CD-ROM drives, then one of these devices will be

configured to supply termination power.

4.If a computer with one or more SCSI peripherals is cabled to a subsystem

with additional SCSI devices, one SCSI device in the host computer would

normally be configured to supply termination power for the bus.

You should avoid having a SCSI device in both the host computer and the

subsystem configured to supply termination power. Ideally, you want the

source of the termination power for the bus to be supplied by one power

source.

For information on how to configure terminator power, see the following documents:



SCSI Disk Drives Installation Instructions,

PDI-00436-20, revision A12 or

later.



AM-625/626/627 SCSI 1/4" Streaming Tape Drive Installation Instructions

PDI-00625-00, revision A05 or later.



AM-647 DAT Tape Drive Installation Instructions,

PDI-00647-00, revision

A02 or later.

PDI-00436-20, Rev. A15

Page 6 Installation Instructions: SCSI Disk Drives

8.0SCSI DRIVE INSTALLATION (AM-1400/1600 COMPUTERS)

This section details how to install a replacement 3-1/2" SCSI drive into your AM-1400

or AM-1600 computer. AM-1400 and AM-1600 computers do not require a 5-1/4"

mounting bracket.

SCSI disk drives used in AM-1400/1600 computers must be installed with the drive’s

signal ground isolated from the computer’s chassis ground. Before installing your new

disk drive, see Section 10 (in this document) dealing with drive isolation.

8.1Getting Started

The first step in the installation process is to remove the computer top cover. The top

cover is held in place with four phillips-head screws, two on each side. After you have

removed the screws, lift off the top cover and place it in a safe spot.

The next step is to remove the drive mounting bracket from the chassis. This bracket is

held in place with four phillips-head screws. The screw locations are shown in Figure 2,

called out as A, B, C, and D.

DRIVE MOUNTING BRACKET

MAC215

Figure 2

Once you have taken out the screws, remove the drive mounting bracket from the

computer chassis. This will expose the mounting brackets that support the SCSI 3-1/2"

disk drive. The drive is held in place with four screws, two on each side.

Maxtor disk drive product kits include special drive mounting brackets that must be used

for AM-1400/AM-1600 installations. The contents of these kits vary depending on the

drive model. Read the appendix information for the drive you are installing for

information on special brackets and mounting instructions.

PDI-00436-20, Rev. A15

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