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Document:	KZMSA Adapter Installation Guide
Order Number:	EK-KXMSX-IN
Revision:	001
Pages:	48
Original Filename:

OCR Text

KZMSA Adapter
Installation Guide
Order Number EK–KXMSX–IN.001

This guide tells how to install the KZMSA adapter (a SCSI I/O adapter) in
a DEC 7000 AXP or DEC 10000 AXP system.

digital equipment corporation
maynard, massachusetts

First Printing, May 1993
The information in this document is subject to change without notice and should
not be construed as a commitment by Digital Equipment Corporation.
Digital Equipment Corporation assumes no responsibility for any errors that may
appear in this document.
The software, if any, described in this document is furnished under a license and
may be used or copied only in accordance with the terms of such license. No responsibility is assumed for the use or reliability of software or equipment that is
not supplied by Digital Equipment Corporation or its affiliated companies.
Copyright © 1993 by Digital Equipment Corporation.
All Rights Reserved.
Printed in U.S.A.

The following are trademarks of Digital Equipment Corporation:
Alpha AXP
AXP
DEC
DECchip
DEC LANcontroller
DECnet

DECUS
DWMVA
OpenVMS
ULTRIX
UNIBUS
VAX

VAXBI
VAXELN
VMScluster
XMI
The AXP logo

OSF/1 is a registered trademark of the Open Software Foundation, Inc.

FCC NOTICE: The equipment described in this manual generates, uses, and may
emit radio frequency energy. The equipment has been type tested and found to
comply with the limits for a Class A computing device pursuant to Subpart J of
Part 15 of FCC Rules, which are designed to provide reasonable protection against
such radio frequency interference when operated in a commercial environment.
Operation of this equipment in a residential area may cause interference, in which
case the user at his own expense may be required to take measures to correct the
interference.

Contents
Preface ..................................................................................................... vii
Chapter 1 Getting Started: Check the Kits
1.1
1.1.1
1.1.2
1.1.3
1.1.4
1.2
1.2.1
1.2.2
1.3
1.3.1
1.3.2
1.3.3
1.3.4
1.3.5
1.3.6
1.4

Some SCSI Background ......................................................... 1-2
Fast Synchronous Transfer Option ................................ 1-2
Single-Ended and Differential SCSI Implementations . 1-3
Cable Length Restrictions ............................................... 1-4
Finding Out When You Can Use Fast SCSI .................. 1-5
Kits Needed to Install KZMSA Adapter ............................... 1-5
KZMSA-AB Kit ................................................................ 1-5
CK-KZMSA-LA Kit .......................................................... 1-6
Other Digital Items That May Be Needed ............................ 1-6
XMI PIU — DWLMA-AA or -BA Kit .............................. 1-6
SCSI PIU — BA655 Kit ................................................... 1-6
Cabling from XMI PIU to SCSI PIU ............................... 1-7
DWZZA and Expander Cabinet Kits .............................. 1-7
SCSI CD-ROM, Disk, and Tape Units ............................ 1-8
Console Disk for Enabling the Fast Synchronous
Transfer Option .............................................................. 1-8
Connecting to Non-Digital Disks .......................................... 1-9

Chapter 2 Installing the Adapter
2.1
2.2
2.3
2.4

Opening the Front of the XMI PIU ....................................... 2-2
Installing the Adapter in the XMI Card Cage ...................... 2-4
Attaching the SCSI Cable Connector Assembly to the XMI
Bulkhead ................................................................................ 2-6
Connecting the Cables to the XMI Backplane ...................... 2-8

iii

Chapter 3 Verifying That the Adapter Works
3.1

KZMSA Power-Up Self-Test.................................................. 3-2

Chapter 4 Selecting the "Fast Synchronous Transfer"
Option
4.1
4.2
4.3
4.4
4.5

Check the Total Length of Cabling ....................................... 4-2
Determine Which XMI PIUs Hold Each KZMSA ................. 4-4
Boot LFU ................................................................................ 4-6
Use Display Command to Check Configuration ................... 4-8
Use Modify to Enable the Fast SCSI Setting ..................... 4-10

Appendix A Grounding Rules for Cabinets and
Enclosures
A.1
A.2

Checking Ground Offset Voltages ......................................... A-1
Correcting Ground Offset Problems ...................................... A-2

Examples
4-1
4-2
4-3
4-4

Booting LFU from the RRD42 ............................................... 4-6
Booting LFU from an InfoServer .......................................... 4-6
LFU Display Command ......................................................... 4-8
LFU Modify Command ........................................................ 4-10

Figures
1-1
1-2
1-3
1-4
1-5
1-6
2-1
2-2
2-3
2-4
3-1
4-1
4-2
iv

Steps in Installing the KZMSA Adapter ............................... 1-1
SCSI Terminology .................................................................. 1-2
Single-Ended and Differential Transmission....................... 1-3
DWZZA Bus Adapters Allow Extended Cable Length ......... 1-4
Contents of the KZMSA-AB Kit............................................ 1-5
Contents of the CK-KZMSA-LA Kit...................................... 1-6
Opening the Front of the XMI PIU ....................................... 2-2
Placing the KZMSA Adapter in an XMI Slot ........................ 2-4
Attaching the Cable Assembly to the XMI Bulkhead .......... 2-6
Installing the Cables in the XMI Backplane ........................ 2-8
Yellow LED Indicates Power-Up Self-Test Passed.............. 3-2
Setting the "Fast Synchronous Transfer" Option ................. 4-1
Computing Single-Ended Cable Length .............................. 4-2

4-3
4-4
4-5

How to Compute Cable Length When Using DWZZAs ........ 4-3
"Hose" Cabling the IOP Module to the XMI PIU ................. 4-4
DEC 7000 System Showing Fast SCSI Possibilities ............ 4-9

Tables
1-1
1-2
1-3
1-4
1-5

Maximum Cable Length Defined by ANSI SCSI Standard . 1-4
Digital’s Single-Ended Cable for SCSI PIU Connections.... 1-7
SCSI Disk and Tape Units .................................................... 1-8
SCSI Single-Ended Cables Available from Digital............ 1-10
SCSI Terminators Available from Digital .......................... 1-10

Preface
Intended Audience
This manual is written for someone who needs to install a KZMSA adapter
in the XMI card cage of a DEC 7000 or DEC 10000 system.

Document Structure
This manual has four chapters and an appendix, as follows:
•

Chapter 1, Getting Started: Check the Kits, describes the contents of the kits needed to install the adapter, and lists the other kits
needed to do SCSI tape and disk I/O. The chapter also gives information needed for those who wish to connect to non-Digital devices.

•

Chapter 2, Installing the Adapter, tells how to install the KZMSA
adapter in the XMI card cage of a DEC 7000 or DEC 10000 system and
connect the bulkhead cable assembly to the bulkhead of the XMI plugin unit (PIU).

•

Chapter 3, Verifying That the Adapter Works, describes the
power-up self-test for the KZMSA, which tests the basic functionality
of the board.

•

Chapter 4, Selecting the "Fast Synchronous Transfer" Option,
tells how to modify one of the KZMSA firmware parameters to allow
for what is sometimes called simply "fast SCSI" operation. This option
widens the range of possible peak transfer rates where cabling restrictions allow.

•

Appendix A, Grounding Rules for Cabinets and Enclosures,
gives the rules to follow to ensure proper grounding in multiple-cabinet
or -enclosure SCSI configurations. Improper grounding can be a safety
hazard and can also cause performance degradation and/or data corruption.

vii

Documentation Titles
Table 1 lists books related to the installation of the KZMSA adapter and
general troubleshooting and service information.

Table 1 Related Documentation
Title

Order Number

Installation Kit

EK–7000B–DK

Site Preparation Guide

EK–7000B–SP

Installation Guide

EK–700EB–IN

Hardware User Information Kit

EK–7001B–DK

Operations Manual

EK–7000B–OP

Basic Troubleshooting

EK–7000B–TS

Service Information Kit—DEC 7000

EK–7002B–DK

Platform Service Manual

EK–7000A–SV

System Service Manual

EK–7002B–SV

Pocket Service Guide

EK–7700A–PG

Advanced Troubleshooting

EK–7701A–TS

Related Manuals
BA655 SCSI Disk and Tape PIU Installation Guide

EK–BA655–IN

StorageWorks Family Configuration Guide

EK–BA350–CG

StorageWorks Family User’s Guide

EK–BA350–UG

DWLMA XMI PIU Installation Guide

EK–DWLMA–IN

viii

Chapter 1
Getting Started: Check the Kits
The KZMSA I/O adapter is used in the XMI plug-in unit (PIU) of a DEC
7000 AXP or DEC 10000 AXP system. The KZMSA allows I/O to tapes and
disks using the SCSI (Small Computer Systems Interface) protocol. Figure
1-1 shows the steps involved in installing the adapter alone.
For I/O, however, you need to connect the KZMSA to SCSI disks and/or
tapes. Digital supplies the BA655 SCSI disk and tape PIU for SCSI I/O
devices in the system and expander cabinets of the DEC 7000 and DEC
10000 systems. Digital also supplies separate SCSI storage cabinets and
devices that allow the longer cable lengths needed for extensive storage arrays. Or, the site may be connecting to non-Digital devices.
Thus, the installation you are working on may involve more than simply
installing the adapter. You need to check to see what other equipment exists or will be used with the KZMSA adapter. This manual tells what is
currently available and what to look for in the way of other equipment that
affects the adapter’s installation. See the BA655 SCSI Disk and Tape PIU
Installation Guide for information on installing devices in the SCSI PIU.

Figure 1-1

Steps in Installing the KZMSA Adapter

1. Install the
board and XMI
cables

2. Verify operation of
the board

3. Enable
fast SCSI,
if applicable

Getting Started: Check the Kits 1-1

1.1 Some SCSI Background
You may be installing only the KZMSA adapter at this point. Or, you may
also be installing attendant I/O devices and cabling. Either way, it will
help to know a little about the Small Computer Systems Interface (SCSI).
The characteristics of the interface are regulated by the American National Standards Institute (ANSI), which produces documents describing
the hardware and software interface. You may find the terms used to describe SCSI features confusing. The terms you need to know for installation of the KZMSA revolve around a feature called the "fast synchronous
transfer option," or "fast SCSI" (see Figure 1-2).

Figure 1-2

SCSI Terminology

FAST SCSI!!!!!!!

Single-Ended
Differential

...

eek!

3 meters=9.8 ft
Expander

If single-ended
ELSE DWZZA = differential =>

25 meters = 82 ft

1.1.1 Fast Synchronous Transfer Option
The SCSI "fast synchronous transfer option" makes it possible for I/O devices that can run fast SCSI to achieve from 5- to 10-Mbytes/second peak
rate transfers in synchronous mode. The SCSI-1 specification defines the
peak transfer rate in synchronous mode as 1 to 5 Mbytes/second or 1.5
Mbytes/second in asynchronous mode.
Running fast SCSI, then, can double the transfer rate. However, many cable configurations do not handle fast SCSI, so the KZMSA offers a choice.
Version 4.3 and upward of the KZMSA firmware offer the option of select1-2 Getting Started: Check the Kits

ing fast SCSI. The default is unselected, for the factor affecting whether
fast SCSI can be used is cable length, which varies according to the type of
transmission: single-ended or differential. You can select fast SCSI without jeopardizing transfers to devices that do not support fast SCSI, because
each transfer is negotiated; both device and controller must agree to do
fast, or operation reverts to 1- to 5-Mbytes/second peak transfer rate.

1.1.2 Single-Ended and Differential SCSI Implementations
The ANSI SCSI-2 specification defines two types of SCSI transmission:
single-ended and differential. The choice affects cable length. The
shorter-length single-ended option is intended primarily for connecting to
devices within a cabinet. The longer cable possible with the differential
option allows for connection to expander cabinets farther from the system.
One reason that the cable can be longer with differential is that the transmission method provides better protection from noise interference.
The KZMSA is a single-ended adapter; current is passed onto the cable to
form a data signal (the rectangular bump in the signal wire in Figure 1.3).
Noise can occur when an electrical disturbance (such as might be caused
by lightning) causes a spike in the current on the signal wire that can be
misinterpreted as a data signal (the jagged bump in the signal wire).
The DWZZA bus converters, available from Digital, convert single-ended
transmissions to differential. Differential transmission decreases noise interference by using two signal wires and measuring a signal as the difference between the voltages in the two signal wires. A spike from a disturbance is identical in both data wires, hence the difference between the
voltages remains the same and is not interpreted as a data signal.

Figure 1-3

Single-Ended and Differential Transmission

Data signal

Single-Ended
Differential

Noise
interference
No noise
interference

Getting Started: Check the Kits 1-3

1.1.3 Cable Length Restrictions
As discussed, the ANSI SCSI specification defines limits for the length of
cable for connecting to SCSI I/O devices. The length varies according to
two factors:
•

Whether single-ended or differential transmission is used, and

•

Whether the fast SCSI option is used.

Table 1-1 shows the length of cable allowed for these variations specified
by the ANSI SCSI standard. The DWZZA bus adapters can be used on the
DEC 7000/10000 systems to convert from single-ended to differential and
back to single-ended cable connected to Digital expander cabinets. The
limits apply to each segment, as shown in Figure 1-4, and allow a combined fast SCSI total cable length of 101 ft 8 in.

Table 1-1 Maximum Cable Length Defined by ANSI SCSI
Standard
Fast SCSI Option

No Fast SCSI Option

Single-Ended

3 meters ( 9 ft 10.8 in)

6 meters (19 ft 7.2 in)

Differential

25 meters (82 ft)

Figure 1-4

DWZZA Bus Adapters Allow Extended Cable Length

DEC 7000/10000

3 meters
3 meters
single-ended
single-ended
internal to shelf
total from XMI
backplane
25 meters
differential

Expander
Cabinet
DWZZA-VA

DWZZA-AA
3 m + 25 m + 3 m = 31m = 101 ft 8 in

1-4 Getting Started: Check the Kits

1.1.4 Finding Out When You Can Use Fast SCSI
The KZMSA is a single-ended adapter; thus, whether or not you can use
fast SCSI (a parameter you can define when you install the KZMSA) depends on the type and length of the cable you use to connect the KZMSA to
the I/O devices.
If you have DWZZA bus adapters to install, and the length of single-ended
cable you use to attach to the DWZZAs at each end is less than 3 meters,
you can use fast SCSI. See Chapter 4 to learn how to calculate the length
of single-ended cable used in installing from the XMI bulkhead and within
a shelf in the SCSI PIU or expander cabinets.
If you do not have DWZZA bus adapters, whether or not you can use fast
SCSI depends on the length of single-ended cable needed to complete the
bus connection to the I/O devices in a SCSI PIU. See Chapter 4 for rules
on calculating the length of single-ended cable.

1.2 Kits Needed to Install KZMSA Adapter
1.2.1 KZMSA-AB Kit
The KZMSA-AB kit contains this book; the other component is the
T2029-AB module, otherwise known as the KZMSA adapter, and its case.

Figure 1-5

Contents of the KZMSA-AB Kit

KZMSA Adapter
Installation Guide

Microprocessor
Subsystem

DMA and
Shared
Memory
Subsystem

EK-KXMSX-IN

XMI Subsystem

SCSI
Subsystem

T2029-AB Module

Getting Started: Check the Kits 1-5

1.2.2 CK-KZMSA-LA Kit
This kit contains the cable assembly needed to connect the adapter to the
XMI PIU bulkhead. It also contains two SCSI bus terminators.

Figure 1-6

Contents of the CK-KZMSA-LA Kit

12-37618-01
Terminators
17-03452-01
Cable Assembly

1.3 Other Digital Items That May Be Needed
1.3.1 XMI PIU — DWLMA-AA or -BA Kit
The KZMSA adapter functions on the XMI bus, so the system you are
working with must have an XMI PIU. Two XMI PIU kits are available,
one for installation in the system cabinet and one for installation in an expander cabinet. The difference is in the length of the "hose," the cable connecting the IOP module on the LSB bus, where the CPU and memory reside, to the XMI bulkhead connector to the DWLMA module on the XMI
bus, where the I/O adapters reside:
•

DWLMA-AA Kit —for installing in the system cabinet

•

DWLMA-BA Kit — for installing in an expander cabinet

The directions for installing an XMI PIU are given in the DWLMA XMI
PIU Installation Guide, part of the DWLMA kits.

1.3.2 SCSI PIU — BA655 Kit
To perform I/O, the KZMSA adapter must be connected to a SCSI tape or
disk unit. Digital provides the SCSI PIU for holding Digital’s tapes and
disks in a DEC 7000 or 10000 system or expander cabinet. The SCSI PIU
kit, BA655, contains the SCSI PIU that fits into the cabinet and plugs into
the power supply, two shelves within the PIU assembly, a power unit for
each shelf, and various cover plates, screws, internal cabling, and gaskets.

1-6 Getting Started: Check the Kits

The directions for installing a SCSI PIU are given in the BA655 SCSI Disk
and Tape PIU Installation Guide, also a part of the BA655 kit.

1.3.3 Cabling from XMI PIU to SCSI PIU
The single-ended cabling to connect the KZMSA connectors in the XMI
PIU bulkhead to the SCSI PIU or to the DWZZA are, at this printing,
available in 2-, 3-, 4-, 5-, 6-, 9-, and 12-foot lengths. (See Table 1-2.)
Check the Digital Systems and Options Catalog for the cabling available.

Table 1-2 Digital’s Single-Ended Cable for SCSI PIU Connections
Type

Length

Part Number

SCSI-2 to SCSI-2
(50-pin, high-density)

2 ft
3 ft
4 ft
5 ft
6 ft
9 ft
12 ft

BC10U-02
BC10U-03
BC10U-04
BC10U-05
BC10U-06
BC10U-09
BC10U-12

1.3.4 DWZZA and Expander Cabinet Kits
As described in Section 1.1.3, the DWZZA devices extend the allowable cable length for fast SCSI to 31 meters, or 101 feet, 8 inches, allowing connection to special expander cabinets with their own power supply. See the
Digital Systems and Options Catalog if you need information on what expander cabinets and kits related to installation with the DEC 7000/10000
systems are available (including related installation documentation).

Getting Started: Check the Kits 1-7

1.3.5 SCSI CD-ROM, Disk, and Tape Units
The CD-ROM, disk, and tape units available at this printing for the SCSI
PIU and supported by the KZMSA are listed in Table 1-3.

Table 1-3 SCSI Disk and Tape Units
Disks

Tapes

RRD42

TKZ60

RWZ01

TLZ06

RZ26

TSZ07

RZ73

TZ85

RZ74

TZ857
TZ86
TZ867

Again, check the Digital Systems and Options Catalog for current information on what disks and tapes are supported by the KZMSA.

1.3.6 Console Disk for Enabling the Fast Synchronous
Transfer Option
Versions 4.3 and upward of the KZMSA adapter firmware make available
the SCSI "fast synchronous transfer option," which makes it possible for
I/O devices that can run fast SCSI to achieve from 5- to 10-Mbytes/second
peak rate transfers in synchronous mode. The SCSI-1 specification defined the peak transfer rate in synchronous mode as 1 to 5 Mbytes/second
or 1.5 Mbytes/second in asynchronous mode.
One aspect of fast transfer rates is the length of cable that can be used.
The total length of a fast, single-ended SCSI bus cannot be more than 3
meters (9.8 feet). Buses without the fast option can extend to 6 meters
(19.6 feet). This includes the length of the cabling from the XMI backplane
to the XMI bulkhead, which is 30 inches (+/− 1/2 inch) in length, and the
cabling in the shelf of the SCSI PIU. This length depends on how the
shelves are cabled, as described in the SCSI Disk and Tape PIU Installation Guide.

1-8 Getting Started: Check the Kits

The default setting for the KZMSA is to have "fast" transfers disabled,
since your configuration may make it necessary to use cables longer than
9.8 feet. However, you can set a firmware parameter to enable "fast"
transfers for any particular channel, using the Loadable Firmware Update
(LFU) Utility, provided on the Alpha AXP Systems Firmware Update CD
(Part Number AG-PTMW*-BE, where * is the letter that denotes the disk
revision). Chapter 4 describes how to boot and run LFU to modify this
parameter.

1.4 Connecting to Non-Digital Disks
The following information is provided for those interested in connecting
the KZMSA adapter to non-Digital devices. The KZMSA is an 8-bit, singleended adapter providing two channels of I/O, each channel supporting up
to seven SCSI targets. The KZMSA default has the "fast" option disabled
for both channels, as described in Section 1.3.6, but either or both channels
can be set to "fast" with the LFU utility, as described in Chapter 4.
The two connectors in the bulkhead are 50-pin, high-density, pin and
socket female connectors.
The protocol used in the implementation of the KZMSA firmware is revision 10d of the ANSI draft proposed for the SCSI-2 interface; document
X3.131-199X, dated May 1, 1991. This document is available from Global
Engineering Documents, 2805 McGaw, Irvine, CA 92714. The KZMSA
firmware implements a subset of the features described in this document.
Specifically, the KZMSA does not support the following optional features:
•

Wide transfers

•

Tagged queuing

•

Linked commands (a SCSI-1 feature also)

•

Asynchronous event notification

•

Extended contingent allegiance condition handling

You can connect the KZMSA to a device with a SCSI-1 connector, but devices with SCSI-2 high-density connectors are preferred so that you can
use the active terminators supplied with the CK-KZMSA-LA kit. Other
recommendations include:
•

Dedicate one port to one external device.

•

Limit the cable length from the I/O bulkhead to 12 feet maximum, the
shorter the better.

•

Use external device grounding common to the system to avoid ground
currents (see Appendix A).

Getting Started: Check the Kits 1-9

See Tables 1-4 and 1-5 for SCSI cables and terminators available from
Digital.

Table 1-4 SCSI Single-Ended Cables Available from Digital
Type

Length

Part Number

SCSI-2 to SCSI-2
(50-pin, high-density)

2 ft
3 ft
4 ft
5 ft
6 ft
9 ft
12 ft

BC10U-02
BC10U-03
BC10U-04
BC10U-05
BC10U-06
BC10U-09
BC10U-12

SCSI-2 (50-pin, high-density) 6 ft
12 ft
to SCSI-1 (50-pin, lowdensity)

BC09D-06
BC09D-12

Table 1-5 SCSI Terminators Available from Digital
Type

Part Number

SCSI-2 active terminator

12-37618-01

SCSI-1 passive terminator

12-30552-01

1-10 Getting Started: Check the Kits

Chapter 2
Installing the Adapter
This chapter tells how to install the KZMSA adapter into an XMI plug-inunit (PIU) in DEC 7000 and DEC 10000 systems.
Observe the following before you start any installation procedure:
WARNING:

Turn off the system power by turning the keyswitch on the
control panel to Disable before working with the XMI PIU.

CAUTION: Wear an ESD wrist strap when installing modules in the XMI
PIU.
The following sections are in this chapter:
•

Opening the Front of the XMI PIU

•

Installing the Adapter in the XMI Card Cage

•

Attaching the SCSI Cable Connector Assembly to the XMI Bulkhead

•

Connecting the Cables to the XMI Backplane

Installing the Adapter 2-1

2.1 Opening the Front of the XMI PIU
Turn off the system power and open the front of the XMI PIU to
access the XMI slot where the KZMSA adapter is to be installed.

Figure 2-1

Opening the Front of the XMI PIU
2

5
5

Unscrew captive
screws

Remove panel

2-2 Installing the Adapter

Turn switch
to Disable

To access the XMI PIU so that you can install the KZMSA adapter:
1.

Shut down the operating system in an orderly fashion.

Power down the system by turning the control panel keyswitch to the
Disable position.

Open the front door of the cabinet. The front of an XMI PIU faces the
front on both the system and expander cabinets, as shown in Figure
2-1.

Ground yourself and the container for the adapter with the two
grounding wires at the left side of the cabinet. Attach the ESD wrist
strap to your wrist and connect the other wire to the adapter container
using the snap. This grounds you and the container and prevents
damage to the electronic components on the adapter.

Remove the panel on the front of the XMI PIU (see Figure 2-1). Release the captive screws at the top of the panel covering the XMI PIU
and remove the front panel.

Installing the Adapter 2-3

2.2 Installing the Adapter in the XMI Card Cage
Choose the slot for the KZMSA adapter and install the adapter in
the XMI card cage.

Figure 2-2

Placing the KZMSA Adapter in an XMI Slot

ESD wrist strap

XMI corner at
top and inward

2-4 Installing the Adapter

To install the KZMSA adapter in the XMI card cage:
1.

Select the slot where you want the KZMSA to go, and lift the lever to
open the chosen slot. Make sure the lever is firmly in the up position.

Remove the adapter from the ESD box. Hold the adapter by using the
flats of your hands, keeping your thumbs and fingers off the sides of
the adapter, so that you do not touch the components on the sides of
the module. (See inset in Figure 2-2.)

Place the adapter in the chosen slot, grasping it by the back corners
(away from the XMI corner), and slide it—XMI corner at the top and
inward (see Figure 2-2)—into the slot until it stops.

Lower the lever to lock the module in the slot.

Replace the front panel of the XMI card cage.

Installing the Adapter 2-5

2.3 Attaching the SCSI Cable Connector Assembly
to the XMI Bulkhead
Install the SCSI bulkhead assembly in the bulkhead of the XMI
PIU.

Figure 2-3

Attaching the Cable Assembly to the XMI Bulkhead

1 Open rear
cabinet door

5
3
Lift pins,
swing open
bulkhead
door
2
Loosen captive
screws and remove
cable door

2-6 Installing the Adapter

To install the SCSI cable assembly to the XMI bulkhead door:
1.

Open the rear cabinet door to access the bulkhead of the XMI PIU.

Remove the cable door (a panel at the bottom of the cabinet) by releasing the two captive screws at the top of the panel and lifting it off.

Lift the two spring-loaded pins on the bulkhead door and swing it open
on its hinges.

Remove the flat plate over one of the openings in the I/O bulkhead.

Install the SCSI bulkhead assembly (part number 17-03452-01) using
a Phillips screwdriver to fasten the two small screws that hold the
plate to the bulkhead door.

Installing the Adapter 2-7

2.4 Connecting the Cables to the XMI Backplane
Plug the connector cables into the appropriate segments of the
XMI backplane. Install terminators.

Figure 2-4

Installing the Cables in the XMI Backplane

XMI Backplane

Channel 1
for slot D
12
D
E

SLOT 8 9 A B C D E
Channel 0
for slot D
Example shows that for
Channel 1 for Slot D,
cable plugged into segment D2 of Slot D, and
for Channel 0 for slot D,
cable plugged into segment E2 of Slot D.
1
3

Terminator LED

2-8 Installing the Adapter

To install the connector cables in the XMI backplane:
1.

It is easiest if you first take the leftmost cable connector (from the
viewpoint of the outside of the bulkhead door) in the bulkhead assembly and plug the loose end into the XMI backplane. To make the left
connector channel 0, plug the end into segment E2 of the slot where
the KZMSA adapter is installed. Note that the small raised "notch" on
one side of the cable connector goes to the right.

Take the right cable connector and plug it into segment D2 (for channel 1) of the same slot. Again, the notch in the cable connector goes to
the right.

Plug both terminators into the connectors for those channels at the
bulkhead. (You can proceed with cabling to SCSI devices after verifying that the adapter is working properly, as described in Chapter 3.)
When the power is turned back on, the LED on the terminator will
light, showing that the terminator is properly connected. (Termination is required for proper operation of the KZMSA.)

The next step is to verify that the KZMSA is working. It is a good idea to
do this before cabling any I/O devices to the KZMSA adapter at the XMI
bulkhead. Proceed to Chapter 3.
1.

Refasten the I/O panel door at the bottom of the cabinet and close the
rear and front doors.

Power up the system by turning the keyswitch to Enable.

Installing the Adapter 2-9

Chapter 3
Verifying That the Adapter Works
Before cabling to SCSI devices, check that the adapter is operating properly. This chapter tells how to tell whether the power-up self-test passes
or fails, and some simple procedures to try if it fails.
The procedure for installing the SCSI disk and tape PIU is given in the
BA655 SCSI Disk and Tape PIU Installation Guide. A disk exerciser is
also described in that manual which further tests the adapter, cabling, and
devices.

Verifying That the Adapter Works 3-1

3.1 KZMSA Power-Up Self-Test
On power-up, the adapter executes a series of ROM-based routines
that test the basic functionality of the components of the adapter.
The yellow LED on the adapter lights when power-up self-test
passes.

Figure 3-1

Yellow LED Indicates Power-Up Self-Test Passed

Yellow LED
on adapter is lit
when power-up
self-test passes

3-2 Verifying That the Adapter Works

Power up the system by turning the control panel switch to Enable.
Wait 30 to 40 seconds for the cooling and power subsystems to begin
operation, and for the KZMSA power-up self-test to complete. Then
check the yellow LED on the KZMSA adapter. Proceed to step 2 or
step 3.

Adapter LED Lights. If the adapter LED lights, the adapter has
passed self-test, and you can proceed with step 4. connecting the
adapter to whatever SCSI I/O devices you are using.

Adapter LED Does Not Light. If the KZMSA adapter LED does not
light on power-up, and the LEDs on the other modules indicate that
they are all operable, make the following checks:
a. Check that the KZMSA bulkhead cables are properly connected to
the XMI backplane. Power the system down and check to ensure
that the cables are in the proper backplane segments (see Section
2.4) and are firmly connected to the backplane.
b. Check that the KZMSA module is seated properly in the XMI card
cage. Power down the system and reposition the module, making
sure that it is in the right track, engaged with the XMI backplane,
and that the lever is down, holding the module firmly in place.
c. Power up the system. If the adapter LED still does not light after
you have adjusted and checked the cables and module seating, and
no other problems appear on the system, try replacing the adapter.
Proceed to step 4 when power-up self-test passes on an installed
KZMSA adapter.

Once the KZMSA adapter is installed and passes self-test, you can begin to cable the KZMSA to the I/O devices it is to serve. Or, if you are
simply installing the adapter and waiting for other equipment to arrive, you can proceed with powering up the system and booting the operating system.

One final step before proceeding with cabling or booting is determining whether or not you wish to enable the "fast synchronous transfer
option" for either of the two I/O channels (ports). See Chapter 4.

Verifying That the Adapter Works 3-3

Chapter 4
Selecting the "Fast Synchronous
Transfer" Option
You may improve transfer speeds for some configurations by selecting the
"fast synchronous transfer" option for some KZMSA channels.
NOTE: Only firmware Revisions 4.3 and up allow fast SCSI. And, hardware revisions E01 and lower will not work with LFU. You must
return those adapters to the factory for modification to run LFU.
The sections in this chapter include:
•

Check the Total Length of Cabling

•

Determine Which XMI PIUs Hold Each KZMSA

•

Boot LFU

•

Use the Display Command to Check Configuration

•

Use Modify to Enable the Fast SCSI Setting

Figure 4-1

Setting the "Fast Synchronous Transfer" Option

Boot LFU and modify the parameters:
>>> sho
*
(Boot LFU from the KZMSA
>>> b rrd42-dev device shown as RRD42)
(Display the system configuration to get mnemonics)
Function? mod KZMSAn
(Select fast SCSI for
each KZMSA channel
Function? mod KZMSAn
desired)
Function? disp

Function? exit
>>>

(Exit LFU, which performs
initialization and returns to
system console prompt)

Selecting the "Fast Synchronous Transfer" Option 4-1

4.1 Check the Total Length of Cabling
KZMSA ports cabled to SCSI devices with single-ended cabling
whose total length (from the XMI backplane to the device) is less
than 3 meters (9 ft 10.8 in) can be enabled for fast SCSI. Configurations that require the use of longer single-ended cabling cannot
use fast SCSI. KZMSA ports connected to DWZZA bus adapters
can be enabled for fast SCSI as long as the single-ended cabling at
each end is less than 3 meters. By default, fast SCSI is disabled.

Figure 4-2
XMI
Backplane

Computing Single-Ended Cable Length
XMI Bulkhead

Shelf in
SCSI PIU

30 in. (+/- 1/2 in.) + x inches (cable from
+ y Inches (cable
XMI bulkhead to SCSI
internal to shelf or shelves)
storage shelf -- variable) plus z (any connecting
cable)
(Include
all internal
30 in + x + y + z <= 6 meters (19 ft 7.2 in)
cable in y
<= 3 meters (9 ft 10.8 in)
for multiple
for fast SCSI
shelves)
To compute y:
(Cable from
different
KZMSA
channels)
Single shelf,
one external cable:
y = 34.7 in (.881 m)

Split shelf
Left: y =16.4 in (.413 m) Shelf with two
Right: y = 23.6 in (.599 m) external cables
y = 35.7 in (.907 m)

4-2 Selecting the "Fast Synchronous Transfer" Option

After you install and test the KZMSA, cable must be run from the XMI
bulkhead to the SCSI I/O devices. Digital makes the SCSI disk and tape
PIU to hold SCSI devices for the system and expander cabinets of the DEC
7000 and 10000 systems. The SCSI Disk and Tape PIU Installation Guide
tells how to install that PIU and cable to its shelves within it for various
configurations. DEC 7000 and 10000 systems can also use the DWZZA bus
adapters, differential cabling, and storage expander cabinets to hold SCSI
devices at distances farther than allowed by single-ended cabling alone.
For single-ended connections (SCSI PIU within DEC 7000 and 10000
system and expander cabinets), the total length of the SCSI bus, from the
XMI backplane to the bus terminator, must be less than 6 meters (19.6
feet) for SCSI operation. The fast SCSI option can be enabled if the total
length of the bus is 3 meters or less. Figure 4-2 shows how to determine
the total length of the bus.
For differential connections (using the DWZZA bus adapters), the total
length of the SCSI bus can be 101 ft 8 in, as described in Section 1.1.3.
This includes a maximum of 3 meters (9 ft 10.8 in) of single-ended cable at
either end of the differential cable, and a maximum of 25 meters (82 ft) of
differential cable. Figure 4-3 shows how to determine the length of singleended cable at either end of the differential cable.

Figure 4-3

XMI
Backplane

How to Compute Cable Length When Using DWZZAs

Storage
Shelf

XMI Bulkhead

Power
Outlet

DWZZA-VA
(unit in shelf)
Differential Cable
25 m (82 ft) maximum

DWZZA-AA
(free-standing unit with power cord)
30 in. (+/- 1/2 in.) + x inches (single-ended cable from bulkhead to
DWZZA-AA) <= 3 meters (9 ft 10 in) for fast SCSI.
6 meters (19.6 ft) without fast SCSI
y inches (cable internal to shelf or
shelves (see Fig. 4-2) <= 3 m (9 ft 10 in)
for fast SCSI, 6 m (19.6 ft) without fast SCSI

Selecting the "Fast Synchronous Transfer" Option 4-3

4.2 Determine Which XMI PIUs Hold Each KZMSA
To find out which KZMSA channels can be enabled for fast SCSI,
you will need to determine the "name" of the XMI PIUs that hold
each KZMSA. These names appear on console and LFU displays.

Figure 4-4

"Hose" Cabling the IOP Module to the XMI PIU

C1
C0
Expander System
Cabinet Cabinet
(Rear View)

Follow the hose
down to see which
XMI PIU is C0, C1,
and so forth.

4-4 Selecting the "Fast Synchronous Transfer" Option

To enable "fast SCSI," you run the LFU utility. First, though, you must
determine which KZMSA channels can be enabled for fast SCSI.
The KZMSAs are labeled on the console and LFU configuration displays
according to the XMI PIU they are installed in. XMI PIUs are labeled C0,
C1, C2, or C3, depending on which connector in the IOP module is used to
plug in the large cable, or "hose" to the XMI PIU and DWLMA module (see
Figure 4-4).

Selecting the "Fast Synchronous Transfer" Option 4-5

4.3 Boot LFU
To modify parameters on the KZMSA, you run the Loadable Firmware Update (LFU) Utility, which you boot from the RRD42 or an
InfoServer, if you have one.

Example 4-1 Booting LFU from the RRD42
2
P00>>> sho dev kz *
polling for units on kzmsa0, slot 3, xmi0...
dka300.3.0.3.0 DKA300
RZ73
dka400.4.0.3.0 DKA400
RZ73
(Boot the RRD42 device on a KZMSA)
3
dkb400.4.1.3.0 DKB400
RRD42
P00>>> b dkb400.4.1.3.0 -flag 0,80
Bootfile: [DEC7000]AXP7000_Vnn.APB

4
5

Booting...

Example 4-2 Booting LFU from an InfoServer
P00>>> sho net
1
polling for units on demna0, slot 13, xmi0...
exa0.0.13.0: 01-00-2B-24-3F-E1
polling
. for units on demna1, slot 14, xmi0
.
exb0.0.14.0 01-00-2B-24-3F-E1
. boot exa0 -file APB_015 -flag 0,80
P00>>>
2
Booting...
(exa0 is the first DEMNA encountered:
Connecting to boot device exa0
if more than one DEMNA is on
Requesting MOP Assistance Volunteer.....
your system, and file APB_015
cannot be found on exa0, the console
Bootfile: [DEC7000]AXP7000_Vnn.APB
will keep searching indefinitely, printing
out periods here as the search continues.
FUNCTION
FUNCTION
Type CTRL/C to halt the search and
ID
boot from the next DEMNA (exb0) until
1
Display Menu
the boot continues past the MOP line
2
Help
and the Bootfile: prompt appears).
3
Choose Service
4
Select Options
5
Stop
Enter a Function ID value: 3
3

4-6 Selecting the "Fast Synchronous Transfer" Option

OPTION
OPTION
ID
1
Find Services
2
Enter known Service Name
Enter an Option ID value: 1
3
Working
Servers found : 2
#1
INFO4$RZ57
INFO4
01-00-28-26-A6-98
#2
Choose number of UPDATE service
UPDATE
OPUS_BSS
08-00-2B-18-A9-75
Enter a Service Number or <CR> for more: 2
3

Booting from the RRD42
1.

Place the Alpha firmware CD-ROM in the system load device.

Type sho dev kz* at the console terminal to display KZMSA devices
on the system. KZMSA adapters handle SCSI I/O.

The load device is identified by the name RRD42. The unit number
for this device is shown as dkb400.4.1.3.0; use whatever number shows
up on your display for the RRD42 in the boot command in step 4.

Using the unit number obtained in step 3, boot the system load device. Use the -flag 0,80 option to get the prompt for the bootfile.

For a DEC 7000 system, type the bootfile name as shown. The nn is
the version number of the Alpha firmware CD-ROM. For a DEC
10000 system, use the name [DEC10000]AXP7000_Vnn.APB. Information describing the progress of the boot operation is displayed, LFU
is loaded and run, and displays a header and a brief description of the
commands available.

Booting from an InfoServer
1.

Type sho net at the console to see if there is more than one DEMNA.

Boot from the first DEMNA (exa0), using the -file option with the filename APB_015. If the console code does not find that file, it will keep
printing periods (...) indefinitely. Do a CTRL/C in this case and boot
from the next DEMNA (exb0) until you see the Bootfile: prompt.

See step (5) above for the bootfile name. The Network Initial System
Load Program displays several menus from which you select the UPDATE service, as shown in the example. LFU is loaded and run.

Selecting the "Fast Synchronous Transfer" Option 4-7

4.4 Use Display Command to Check Configuration
The LFU display command shows the system configuration, providing the device mnemonic you will use to modify the fast SCSI
parameter for the appropriate KZMSAs.

Example 4-3 LFU Display Command
Function? display
LSB
0+
5+
7+
8+

Name

Type

Rev

Mnemonic

FW Rev

HW Rev

KN7AA
MS7AA
MS7AA
IOP

(8001)
(4000)
(4000)
(2000)

0000
0000
0000
0001

kn7aa0
ms7aa0
ms7aa1
iop0

1.0
N/A
N/A
N/A

E04
A01
A01
A

(102A)
(0C36)
(0C36)
(0C03)

A5A6
5143
5143
060B

xmi0
dwlma0
kzmsa0
kzmsa1
demna0

N/A
4.3
4.3
6.8

A
F01
F01

(0C36)
(0C36)
(0C36)
(0C36)
(102A)

5143
5143
5143
5143
A5A6

xmi1
kzmsa2
kzmsa3
kzmsa4
kzmsa5
dwlma1

4.3
4.3
4.3
4.3
N/A

F01
F01
F01
F01
A

C0 XMI
8+
DWLMA
B+
KZMSA
C+
KZMSA
E+
DEMNA

C1 XMI
1+
KZMSA
2+
KZMSA
3+
KZMSA
4+
KZMSA
8+
DWLMA

4-8 Selecting the "Fast Synchronous Transfer" Option

To display the current configuration of the system:
1.

Use the LFU display command to find the device mnemonics for the
KZMSA adapters that you want to enable for fast SCSI operations.

The display command in Example 4-3 shows two XMI PIUs (C0 and
C1). Check the hose cabling as described in Section 4.1 As an example, assume that the C0 hose connects to the XMI PIU in the system
cabinet, and the C1 hose connects to the XMI PIU in the expander
cabinet shown in Figure 4-5.

Check the cabling length, using the technique described in Section 4.1.

Figure 4-5 shows some examples using the 4-foot BC10U-04 cables.

Figure 4-5

DEC 7000 System Showing Fast SCSI Possibilities

kzmsa0 ch. 0 = RRD42
(internal cable too long
for fast SCSI)

OK for Fast SCSI
kzmsa0
ch. 1 = 30.5 in. + 48 in. + 34.7 in. =
137.2 in. = 9.4 ft
kzmsa1
ch. 0 = 30.5 + 48 + 16.4 =
118.9 in. = 7.9 ft
ch. 1 = 30.5 + 48 + 23.6 =
126.1 in. = 8.5 ft

Selecting the "Fast Synchronous Transfer" Option 4-9

4.5 Use Modify to Enable the Fast SCSI Setting
The LFU modify command allows you to enable the fast SCSI parameter for the KZMSA.

Example 4-4 LFU Modify Command
Function? modify kzmsa0

kzmsa0
Local Console:
Log Selftest Errors:
Log NRC 53C710 RBD Errors:
Log XMI RBD Errors:
Log XZA RBD Errors:
RBD Error Logging:
RBD Error Frame Overflow:
Hard Error Frame Overflow:
Soft Error Frame Overflow:
FW Update Error Frame Overflow:
Chnl 0 Fast SCSI:
Chnl 1 Fast SCSI:

ENABLED
ENABLED
ENABLED
ENABLED
ENABLED
DISABLED
DISABLED
DISABLED
DISABLED
DISABLED
DISABLED
DISABLED

Channel_0 ID:
Channel_1 ID:

07
07

Module Serial Number:

*SG909T1455*

Read Only
Read Only
Read Only
Read Only
2

Do you wish to modify any of these parameters? [y/(n)] y

Local Console:
Log Selftest Errors:
.
.
.

ENABLED
ENABLED

Change? [y/(n)]
Change? [y/(n)]

Chnl 0 Fast SCSI:
Chnl 1 Fast SCSI:

DISABLED
DISABLED

Change? [y/(n)]
Change? [y/(n)] y

Channel_0 ID:
Channel_1 ID:

07
07

Change? [y/(n)]
Change? [y/(n)]

Module Serial Number:

*SG909T1455*

4-10 Selecting the "Fast Synchronous Transfer" Option

Change? [y/(n)]

Local Console:
Log Selftest Errors:
.

ENABLED
ENABLED

Chnl 0 Fast SCSI:
Chnl 1 Fast SCSI:

DISBLED
ENABLED

Channel_0 ID:
Channel_1 ID:

07
07

Module Serial Number:

*SG909T1455*

Modify kzmsa0 with these parameter values? [y/(n)] y
6
Function? modify kzmsa1
.
.

.
Function? exit
Initializing...

To enable the fast synchronous transfer option for specific KZMSA ports:
1

Use the modify command for the KZMSAs that you identified as suitable
for fast SCSI operation. The example shows one such sequence.
The modify command displays the current settings for the parameters.
The Chnl x Fast SCSI: lines identify the current settings for the two channels on the kzmsa0. Both are disabled in the example.
After displaying the current settings, LFU asks if you wish to modify any.
Type y to indicate that you wish to change a particular setting.
LFU then displays each parameter and asks if you want to modify that parameter. Simply press RETURN to accept the current setting; type y and
RETURN to change the current setting.
After completing all the parameters, LFU then displays the new settings
and asks if you want to modify the KZMSA with the settings you just provided. Type y and RETURN to modify the EEPROM in the KZMSA with
the new values. (Note: installing firmware updates with LFU will not affect the parameters you change here; they will stay changed through the
update.)
LFU prompts for another command, and you proceed with the next KZMSA that you wish to set for fast SCSI, if any.
Exit LFU when you are done modifying parameters.

Selecting the "Fast Synchronous Transfer" Option 4-11

Appendix A
Grounding Rules for Cabinets and
Enclosures
If the configuration you are working with consists of two or more cabinets
(the system cabinet and an expander cabinet, for example) or enclosures
(such as an I/O enclosure that holds Digital or non-Digital SCSI disks),
and these cabinets or enclosures are connected by a common SCSI bus,
proper grounding between these enclosures is required.
There are two reasons for this:
WARNING:

When two cabinets or enclosures are not connected to a common ground, there is the potential for a personal safety hazard. This is the same type of electrical shock hazard that
exists when household appliances are not properly
grounded.

CAUTION: If the ground offset voltages generated in the power distribution system are excessive, data transmission across the SCSI
bus can be seriously disturbed. For example, the systems
could experience significant performance degradation or possible data corruption.
Single-ended SCSI does not have any allowance for ground offset voltages.
Therefore, any ground voltage above 0 is reducing noise margin. It is
therefore critical to keep these voltages as low as possible. If the offset is
above a few millivolts DC, it should be treated by increasing the ground
strapping and/or the power distribution system.

A.1 Checking Ground Offset Voltages
In a properly wired power distribution system(s) with properly functioning
(no ground faults) equipment connected to the power distribution system(s)
there is generally no need for any further attention to grounding. The
power distribution system provides a satisfactory cab-to-cab path.

Grounding Rules for Cabinets and Enclosures A-1

To ensure the above, a power system survey should be performed by asking
these questions:
1.

Do any outlets being used not have power ground connections?

Is the grounding prong missing on any of the computer equipment
power cords?

Are any of the power outlet neutral connections actually ground connections?

Are the grounds for any of the power distribution circuits (outlets) not
connected to the same power distribution panel?

Are any devices that are not UL or IEC approved connected to the
same breaker as any of the SCSI computer equipment?

If the answers are all "no," the grounding should be adequate for SCSI operation. For final verification, the ground offset should be checked by direct measurement with a simple hand-held multimeter.
If the answers to any of these questions is "yes," the problem must be corrected.
If you are not sure of any of the answers to any of the above questions, you
can measure the actual grounding offset voltage between any two cabinets
with a multimeter. This will only provide data for that particular moment
in time, however. The ground offset values may change over time as additional devices are either plugged into the same power source or activated.

A.2 Correcting Ground Offset Problems
If a multiple-cabinet or enclosure configuration exhibits ground offset voltages between interconnected cabinets which exceed the allowable limits,
there are two solutions:
1.

Have an electrician correct any deficiencies found during the power
system survey. This solution is recommended.

Install grounding cables between enclosures in a SCSI multi-cab or enclosure system. Installing more grounding cables will normally reduce the ground voltage offset sufficiently to meet the requirements.
In severe cases, however, the #6 cables may not be large enough. The
ground voltage offset measurements will still be too large. If the additional grounding cables are not enough, the source of the ground offset
voltage must be traced and either reduced or eliminated.

A-2

Grounding Rules for Cabinets and Enclosures

Index
A
ANSI
definition of fast SCSI, 1-2
SCSI specification, 1-2

B
BA655-AA kit, 1-6
Bulkhead
installing the cable assembly,
2-7
location, 2-7
Buses
LSB, 1-6
XMI, 1-6

C
Cable
from XMI backplane to
bulkhead, 2-8
from XMI bulkhead to SCSI
PIU, 1-7
single-ended, 1-7, 1-10
measuring total length
with single-ended cable, 4-2
with DWZZA adapters, 4-3
Cable assembly
attaching cable to XMI
backplane, 2-8
attaching to XMI bulkhead, 2-6
from KZMSA to XMI bulkhead,
1-6
Cable door, 2-7
Cable length
differential, 1-4, 4-3
single-ended, 1-4, 4-3

with DWZZAs, 1-4, 1-5, 4-3
Channel, 2-9
Console disk, 1-8

D
Differential transmission, 1-3
DWLMA module, 1-6
DWZZA bus converter, 1-3, 1-7

F
Fast SCSI, 1-2, 1-8
cable length, 1-8
how to enable, 4-1
peak transfer rate, 1-8
Fast synchronous transfer option,
1-2, 1-8
cable length, 1-8
how to enable, 4-1
peak transfer rate, 1-8

G
Grounding procedures, 2-3, A-1
Ground offset voltage, A-1

H
Hose cabling, 1-6, 4-4

I
InfoServer, 4-6
IOP module, 1-6, 4-4

K
KZMSA
attached to which XMI PIU, 4-5

Index-1

basic function defined, 1-1
handling procedures, 2-3
implementation specifics, 1-9
installing in XMI card cage, 2-1,
2-4, 2-5
kits needed to install, 1-5
kit contents, 1-5
LED, 3-3
power-up self-test, 3-2
verification, 3-1

L
LFU utility
booting, 4-6
display command, 4-8
modify command, 4-10

N
Noise interference, 1-3

P
Power-up self-test, 3-2

S
SCSI features implemented on
KZMSA, 1-9
SCSI disk and tape units, 1-8
SCSI plug-in unit, 1-6
Self-test, 3-2
Single-ended transmission, 1-3
Storage expander cabs, 1-7

T
Terminators
for SCSI bus at XMI bulkhead,
1-6
SCSI-1 passive, 1-10
SCSI-2 active, 1-10
T2029 module, 1-5

Index-2

V
Verification, 3-1

X
XMI corner
location of, 1-5
XMI PIU, 1-6
attaching connector cables, 2-8
installing the adapter in, 2-4
kit contents, 1-6
opening the front of, 2-2
related to a particular KZMSA,
4-4