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September 1988

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Document:	MicroVAX 3400 VAXserver 3400 Operation
Order Number:	EK-161AA-OM
Revision:	1
Pages:	76
Original Filename:

OCR Text

September 1988

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 suppli8d by Digital Equipment
Corporation or its affiliated companies.
© Digital Equipment Corporation. 1988. All rights reserved.

Printed in U.S.A.
The READER'S COMMENTS form on the last page of this document requests the user's
critical evaluation to assist in preparing future documentation.
The following are trademarks of Digital Equipment Corporation:
COMPACTape
DEC
DECmate
DECnet
DECserver
DECUS
DECwriter
DELNI
DEQNA
DESTA
DIBOL

MASSBUS
MicroVAX
PDP
PIOS

Professional
Q-bus
Rainbow
ReGIS
RSTS
RSX
ItT

ThinWire
ULTRIX
UNIBUS
VAX
VAXcluster
VAXELN
VAXlab
VMS
VT
Work Processor

~DmDDmD'M
ML-S931

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
Chapter 1

vii

System Overview

1.1

Front View and Physical Description of the MicroVAX and
VAXserver 3400 System. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.1.1
The BA213 Enclosure. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.1.1.1
Mass Storage Shelf. . . . . . . . . . . . . . . . . . . . . . . . . . ..
1.1.1.2
Card Cage .................................. ,
1.1.1.3
Power Supplies ...............................
1.1.1.4
Fans. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..
1.1.2
Mass Storage Options ............................
1.2
Functional Description of Base System ................ .
1.2.1
Base System Components ........................ .
1.2.1.1
Central Processing Unit (CPU) .................. .
1.2.1.2
Console Serial Line Unit (SLU) .................. .
1.2.1.3
Main Memory. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..
1.2.1.4
Mass Storage Devices and Controllers. . . . . . . . . . . . ..
1.2.1.5
Power Supplies ...............................
1.2.1.6
Fans. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..
1.2.2
Optional Components. . . . . . . . . . . . . . . . . . . . . . . . . . . ..
1.2.2.1
Communications Controllers .......... . . . . . . . . . ..
1.2.2.2
Real-Time Controllers ..........................
1.2.2.3
Printer Interfaces. . . . . . . . . . . . . . . . . . . . . . . . . . . . ..
1.2.2.4
Other Available Options. . . . . . . . . . . . . . . . . . . . . . . ..
1.3
Dual-Host Capability (VMS Systems Only) . . . . . . . . . . . . ..

1-1
1-8
1-10
1-12
1-15
1-17
1-18
1-18
1-18
1-18
1-18
1-19
1-19
1-20
1-20
1-20
1-20
1-22
1--:22
1-22
1-23

iii

Chapter 2
2.1
2.2
2.2.1
2.2.2
2.3
2.4
2.4.1
2.4.2
2.5
2.6
2.7
2.8
2.9

Using the System

Before You Use a New System ....................... . 2-1
Switch Settings .................................. . 2-1
Normal Operation .............................. . 2-1
Special Operation ............................... . 2-2
Turning On the System ............................ . 2-4
Booting the System ............................... . 2-5
Autobooting the System .......................... . 2-5
Booting the System from Console Mode .............. . 2-8
Using the System ................................. . 2-8
Turning Off the System ............................ . 2-9
Halting the System ............................... . 2-9
Restarting the System. . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 2-10
Resetting the System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 2-10

Chapter 3

Using System Options

3.1
Mass Storage Options ..............................
3.1.1
RF30 Fixed-Disk Drives. . . . . . . . . . . . . . . . . . . . . . . . . ..
3.1.2
TK70 Tape Drive. . . . . . . . . . . . . . .... . . . . . . . . . . . . . . . .
3.1.2.1
Design of the Drive ............................
Labeling a Tape Cartridge ..... .' . . . . . . . . . . . . . . . ..
3.1.2.2
Write-Protecting a Tape Cartridge. . . . . . . . . . . . . . . . .
3.1.2.3
Tape Cartridge Handling and Storage Guidelines. . . ..
3.1.2.4
Inserting a Tape Cartridge. . . . . . . . . . . . . . . . . . . . . ..
3.1.2.5
Removing a Tape Cartridge. . . . . . . . . . . . . . . . . . . . ..
3.1.2.6
Summary of TK70 Tape Drive Controls and Indicator
3.1.2.7
Lights. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..
RV20 Optical Disk Subsystem . . . . . . . . . . . . . . . . . . . . ..
3.1.3
3.1.4
TS05 Tape Drive ................................
Communications Controller Options ...................
3.2
3.2.1
Asynchronous Serial Controllers . . . . . . . . . . . . . . . . . . ..
Without Modem Support. . . . . . . . . . . . . . . . . . . . . . ..
3.2.1.1
3.2.1.2
With Modem Support ...........................
3.2.2
Synchronous Controllers ..........................
Network Controllers. . . . . . . . . . . . . . . . . . . . . . . . . . . . ..
3.2.3

3-1
3-2
3-5
3-7
3-8
3-8
3-10
3-11
3-14
3-15
3-16
3-16
3-16
3-17
3-17
3-19
3-19
3-20

3.3
3.4
3.5

Real-Time Options. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 3-21
Printer Options ................................... 3-21
Adding New Options ............................... 3-22

Appendix A Related Documentation
Glossary
Index
Figures
1-1 MicroVAXNAXserver 3400 System. . . . . . . . . . . . . . . . . . . . . 1-2
1-2 Key Positions. . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
1-3 Sliding Window Closed. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
1-4 Window Partially Open. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
1-5 Window Fully Open. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
1-6 Removing the Front Panel. . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
1-7 Front View of the BA213 Enclosure. . . . . . . . . . . . . . . . . . . . 1-9
1-8 Mass Storage Shelf. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 1-10
1-9 Card Cage ... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 1-12
1-10 CPU Cover Panel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 1-14
1-11 Power Supply. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 1-16
1-12 System Air Circulation. . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 1-17
1-13 KA640-Based Dual-Host Configuration. . . . . . . . . . . . . . . .. 1-24
2-1 Language Selection Menu ........................... 2-3
2-2 Sample Error Summary. . . . . . . . . . . . . . . . . . . . . . . . . . . .. 2-5
2-3 Successful Power-On to List of Bootable Devices . . . . . . . . . . 2-6
2-4 Successful Power-On and Automatic Boot . . . . . . . . . . . . . .. 2-7
2-5 Successful Power-On to Console Mode . . . . . . . . . . . . . . . . . . 2-9
3-1 RF30 Disk Drive Controls and Indicators ................ 3-3
3-2 Inserting and Removing RF30 Unit I.D. Plugs. . . . . . . . . . . . 3-5
3-3 TK70 Tape Drive. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7
3-4 Labeling a Tape Cartridge . . . . . . . . . . . . . . . . . . . . . . . . . .. 3-8

3-5
3-6
3-7

Tape Cartridge Write-Protect Switch. . . . . . . . . . . . . . . . . . . 3-9
Inserting a Tape Cartridge. . . . . . . . . . . . . . . . . . . . . . . . . .. 3-13
Removing a Tape Cartridge. . . . . . . . . . . . . . . . . . . . . . . . .. 3-15

Tables
2-1

2-2
3-1
3-2
3-3

Normal Power-On Indications
2-4
Device Names ................................... . 2-8
RF30 Controls and Indicators ....................... . 3-4
TK70 Tape Drive Controls. . . . . . . . . . . . . . . . . . . . . . . . . .. 3-15
TK70 Tape Drive Indicator Lights . . . . . . . . . . . . . . . . . . . .. 3-16

Preface
This manual describes how to use MicroVAX 3400 and VAXserver 3400
systems. The hardware and software for each of these systems differs
slightly, according to the function of the system. The MicroVAX 3400
is a multiuser system that uses the VMS or ULTRIX operating systems,
and functions as an end- or full-function node on an Ethernet network.
VAXserver systems are single-user systems that use either VMS or ULTRIX
operating systems. VAXserver systems that use VMS are DECnet fullfunction network nodes; systems that use ULTRIX are DECnet end-function
nodes.
The manual is structured as follows:
•

Chapter 1 provides an overview of the systems.

•

Chapter 2 describes how to use each system.

•

Chapter 3 describes how to use options installed in the systems.

•

The appendix lists related documentation.

•

A glossary explains key terms.

NOTE: VAXserver 3400 systems are designed to offer maximum performance
for applications that do not require timesharing. Some of the devices referred
to in this manual are designed for multiuser systems and may not be suitable
for VAXserver systems. Contact your DIGITAL representative if you have
any questions about whether use of a specific device is appropriate for your
VAXserver system.

vii

Conventions
The following conventions are used in this book:
Convention

Meaning
A symbol denoting a terminal key used in text and examples in this book.
For example, IBreak Iindicates that you press the Break key on your terminal
keypad. IReturn I indicates that you press the Return key on your terminal
keypad.
A symbol indicating that you hold down the Ctrl key while you press the
C key.

Bold

Bold type is used to indicate user input. For example:
>>>BOOT MUAO
This line shows that the user must type BOOT MUAO at the "»>" prompt.

WARNING

Provides information to prevent personal injury.

CAUTION

Provides information to prevent damage to equipment or software.

NOTE

Provides general information about the current topic.

viii

Chapter 1

System Overview
MicroVAX 3400 and VAXserver 3400 systems house all system components
in a BA213 enclosure. The enclosure is generally pedestal-mounted and
houses the following:
•

Central processing unit (CPU) module containing on-board Ethernet
controller and disk drive adapter and 4 Mb of main memory

•
•
•
•
•
•

Memory modules
Communications controllers
Tape drive controller
RF30 fixed-disk drives
TK70 tape drivel
Power supplies

Depending on the configuration you ordered, up to three RF30 disk drives
may be mounted inside the BA213 enclosure.
This chapter describes the MicroVAX 3400 and VAXserver 3400 system
components and their functions. The front panel, the enclosure behind the
panel, and the function of the system components are described in turn.
Chapters 2 and 3 describe how to use the system and options.

1.1 Front View and Physical Description of the
MicroVAX and VAXserver 3400 System
The front of the system has a removable front panel that restricts access
to some of the system controls.
Figure 1-1 shows the system with the front panel attached.

Optionally, the system may be tapeless, or a TK50 tape drive may be configured into the
system.

System Overview

1-1

Figure 1-1: MicroVAXlVAXserver 3400 System

The front panel has a sliding window controlled by a 3-position rotary lock.
You can lock the window in one of three positions: closed, partially open,
and fully open. Each position limits access to certain system controls. When
the window is locked in any of its three positions, you can still raise it to
a higher position. However, you cannot lower it beyond the locked position
without using the key.
To open the window, turn the key to position 2 or 3, then slide the window
down. To close the window, slide the window up, then turn the key to lock
the window in position.

Figure 1-2 shows the three key positions and the controls accessible in each
position.

1-2 MicroVAX 3400 VAXserver 3400 Operation

Figure 1-2: Key Positions

I KEY POSITION 1

~I NO ACCESS TO CONTROLS

~O
0
KEY POSITION 2
~ ~ ACCESS TO TAPE DRIVE

~ ~ AND FIXED-DISK CONTROLS
---"'1 KEY POSITION 3
~I ACCESS TO ON/OFF SWITCH AND

'----r-I

FRONT PANEL RELEASE LATCH

1.-_-. . . . .

System Overview 1-3

When the window is up and the key is turned to position 1, the window
is locked in the closed position. You cannot use any controls when the
window is closed, but lights indicating power to the system and activity on
the disks and tape are visible through the window. Figure 1-3 shows the
closed window and key position.
Figure 1-3: Sliding Window Closed

KEY
POSITION 1

MLQ-000712

1-4 MicroVAX 3400 VAXserver 3400 Operation

When the key is turned to position 2, you can open the window partially, as
shown in Figure 1-4. You can use the TK70 tape drive, operate the controls
for the disk drives, and use the Halt and Restart buttons. Chapter 3 has
instructions for using these controls.
Figure 1-4: Window Partially Open

TAPE
CARTRIDGE
DRIVE

FIXED-DISK
CONTROLS AND
INDICATORS

DCOK
LIGHT
MLO-000673

System Overview

1-5

When the key is turned to position 3, you can open the window fully, as
shown in Figure 1-5.
When the window is fully open, you can turn the system on and off, and
you can release the latch that locks the front panel.
Figure 1-5: Window Fully Open

KEY
POSITION 3

FRONT PANEL
RELEASE LATCH

ON/OFF
SWITCH
MLO-000674

Removing the Front Panel

You must remove the front panel to use controls on the CPU cover panel
and power supplies. Remove the front panel, as follows:
1. Insert the key into the lock on the front cover. Turn the key to position

three, the bottom position.
2. Slide the window down.

1-6 MicroVAX 3400 VAXserver 3400 Operation

3. Turn the on/off power switch to off (position 0).
4. Remove the cover by doing the following (see Figure 1-6):
a. Pull out the front panel release latch.
b. Lift the front panel up and out.
Figure 1-6: Removing the Front Panel

LIFT AND REMOVE
FRONT PANEL

MLO-000713

The next section describes the BA213 enclosure, which is exposed when you
remove the front panel.

System Overview

1-7

1.1.1 The BA213 Enclosure
Removing the front panel enables you to see the components housed in the
BA213 enclosure. Figure 1-7 shows a typical configuration.
The BA213 enclosure contains the following:
•

Mass storage drives

TK70 tape drive and two or three RF30· fixed-disk

•

RF30 fixed-disk control panel

•

Card cage containing modules
CPU, memory, communications
controllers, mass storage controllers

•

Power supplies

•

Fans (2)

1-8 MicroVAX 3400 VAXserver 3400 Operation

Figure 1-7: Front View of the BA213 Enclosure
FIXED-DISK
CONTROLS AND
INDICATORS

MASS
STORAGE
SHELF

CARD _ _ _---;-:-_ _-:-..;.;:=.-:.
CAGE

IIHF.-- TAPE

DRIVE

I"'''~*-,:'::''-:-_ _ CPU COVER

PANEL

{ 4 - - - PRIMARY POWER

SUPPLY

(

SECONDARY
POWER SUPPLY
FANS
MLD-000714

System Overview 1-9

1.1.1.1 Mass Storage Shelf

The mass storage shelf extends across the top of the enclosure. The shelf
contains a TK70 tape drive and two to three RF30 fixed-disk drives. The
RF30s are behind the control panel, shown in Figure 1-8.
Figure 1-8:
DISTRIBUTION
PANEL

Mass Storage Shelf
FIXED
DISK2

FIXED
DISK 1

FIXED-DISK
CONTROLS AND INDICATORS

FIXED
DISK 0

RESTART/RUN
BUTTON

TAPE
DRIVE

HALT
BUTTON

DC OK
LIGHT

MLO-000715

The RF30 control panel has several buttons and indicators for each of the
three possible drives. When you tum on your system, indicator lights come
on for each drive present. Chapter 3 describes how to use the control panel.

1-10 MicroVAX 3400 VAXserver 3400 Operation

Below the RF30 control panel is the system DC OK light. When lit,
the green DC OK light indicates that the voltages are within the correct
operating range. When unlit, there is a problem with one of the power
supplies. If the DC OK light is not lit, contact your DIGITAL service
representative.
To the left of the DC OK light is the Halt button. The Halt button is
a two-position button. When you press in the button, the system halts
and the console mode prompt »> appears on the console terminal screen.
Before you can enter console commands, press the Halt button again to
return it to the out position. Now you can enter console commands. If you
inadvertently press the Halt button, type "c IReturnf' to continue. Chapter 2
describes halting the system in more detail.
CAUTION: Pressing in the Halt button halts the system regardless of the
setting of the Break Enable / Disable switch on the CPU cover panel.

To the left of the Halt button is the Restart button. When you press the
Restart button, the system reboots system software. Further instructions
on restarting your system are in Chapter 2.

System Overview

1-11

1.1.1.2 Card Cage
The modules in your system are mounted in a 12-slot card cage under the
mass storage shelf. The slots are numbered 1 to 12 from right to left, as
shown in Figure 1-9.
Figure 1-9: Card Cage

SLOT 1
SLOT 12

f
o

MLO-000716

The number and type of modules installed in your system depend on your
configuration. Each slot, even an empty one, is protected by a module cover
panel. Together the panels form a shield with a two-fold purpose: to protect
external devices from electrical interference generated by the system, and
to protect the system from electrical interference generated by external
devices.
CAUTION: Do not operate the system without DIGITAL-supplied module
cover panels. The cover panels are required to protect the equipment and
to meet international regulatory standards. Do not substitute other module
cover panels as they may not meet the required specifications.

1-12 MicroVAX 3400 VAXserver 3400 Operation

Operating the system without the module cover panels has the following
consequences:
•

The system may overheat due to improper air circulation.

•

The system will not comply with FCC and VDE requirements for
shielding and may produce electrical interference that affects other
equipment.

•

The system is susceptible to electrical interference or damage from
external sources.

The design of the cover panels varies, depending on the type of module
installed in the slot. Modules requiring external cable connections, such
as communications controllers have recesseci cover panels that are riveted
directly to the module. The recessed panels allow space for connecting
cables. Modules requiring no external cable connections, such as mass
storage controllers, are covered by flush cover panels. Empty slots are also
covered by flush cover panels which may be single or double width. All
cover panels, except those covering empty slots, have a label identifYing
the module installed in the slot.
Cables connecting your system to peripheral devices (such as terminals,
modems, and printers) are attached to communications controllers. Each
cable can contain multiple lines. The cables run under the BA213 enclosure
and out the back or side of the enclosure, where the cables are split into
individual lines. Chapter 3 describes these connections in more detail.
The central processing unit (CPU) module is installed in slot 1. Additional
rlle:mory modules may be installed in slots 2 through 4. The CPU and
the first memory module are behind a double-width cover· panel that has
internal cable connections to the CPU module. Figure 1-10 shows the CPU
cover panel.

System Overview

1-13

Figure 1-10: CPU Cover Panel

BREAK
ENABLE!
DISABLE
SWITCH

'-11

--.LLED
DISPLAY

~
•
0

"0=t
t

POWER-UP
MODE SWITCH
MODIFIED

~ MODULAR
JACK

STANDARD
ETHERNET
CONNECTOR

THINWIRE
ETHERNET
CONNECTOR

"ETHERNET
CONNECTOR
SWITCH
MlC>-OOO717

The CPU cover panel has the following components:
•

Break EnablelDisable switch - When the switch is down (dot outside
the circle), breaks are disabled. When the switch is up (dot inside the
circle), breaks are enabled. When breaks are enabled, pressing IBreak Ion
the console terminal halts the processor and transfers control to the
console program. When you change the switch from one setting to the
other, you must activate the new setting by resetting the system. To
reset the system, press the Reset button on either power supply.

1-14 MicroVAX 3400 VAXserver 3400 Operation

CAUTION: When you press the Reset button, all processing is
interrupted. If an operating system is running, always follow the
appropriate shutdown procedure before pressing the Reset button.

•

Power-Up Mode switch - This 3-position rotary switch detennines how
the system responds at power-up:
Language Inquiry Mode (in the top position, indicated by a human
profile) causes the system to display a language selection menu
at power-up if your cORsole tenninal supports multiple languages.
Also, if a default boot device has not been selected, this mode causes
the system to issue a list of bootable devices and prompts you to
select a device from the list. Once a device is selected, the system
autoboots from that device each time you tum it on.

Run Mode (in the middle position, indicated by an arrow) is the
normal operating setting.
Loop Back Test Mode (in the bottom position, indicated by a T in a
circle) causes the system to run loopback tests on the console serial
line at power-up. This setting requires specialloopback connectors
and is for DIGITAL field service use only.
•

The light-emitting diode (LED) display shows the testing sequence
during power-up.

•

Console terminal connector - This modified modular jack (MMJ),
labeled AI, provides the connection for the console terminal.

•

Ethernet connectors. The cover panel has two Ethernet connectors: a
BNC-type connector for ThinWire Ethernet, and a 15-pin connector for
a standard Ethernet transceiver cable. The Ethernet connector switch
allows you to set the type of connection. To use the transceiver cable
connection, set the switch to the up position. To use the ThinWire cable
connection, set the switch to the down position. A green indicator light
(LED) for each connector indicates which connection is active.

1.1.1.3 Power Supplies

Your system has two power supplies. Figure 1-11 shows the controls and
indicators on each power supply.

System Overview

1-15

Figure 1-11: Power Supply

DC OK
LIGHT
RESET
BUnON

CIRCUIT
BREAKER

PRIMARY
POWER SUPPLY
SECONDARY
POWER SUPPLY

MLO-OO0718

The controls and indicator lights function as follows:
•

DC OK - When the DC OK light is lit, the voltages are within the
correct operating range. An unlit DC OK light indicates a problem
with the power supply. Turn off the system and call your DIGITAL
service representative.

•

Reset button - A recessed Reset button enables you to reset the system
to a power-on state without turning it off. The Reset button is recessed
to prevent you from inadvertently resetting the system. Use your

1-16 MicroVAX 3400 VAXserver 3400 Operation

fingertip or a small tool to press the button. See Chapter 2 for the
correct procedures for resetting the system.
•

Circuit breaker - The circuit breaker trips to protect the system from
power surges. When tripped, the circuit breaker is in the out position.
To reset the breaker, press the· circuit breaker to the in position.

1.1.1.4 Fans

Two fans located under the card cage draw air through the BA213 enclosure.
The fans draw air from the top of the enclosure, down through the card cage,
and out the bottom. The speed of the fans varies with the temperature of
the surrounding environment. Figure 1-12 shows the air flow through the
system enclosure.
Figure 1-12: System Air Circulation

System Overview

1-17

1.1.2 Mass Storage Options
Each MicroVAX 3400 and VAXserver 3400 system has a TK70 tape drive
and two or three RF30 fixed-disk drives mounted in the BA213 enclosure.
Instructions for using each of these devices are in Chapter 3.

1.2 Functional Description of Base System
Each MicroVAX 3400 and VAXserver 3400 system includes base system
components common to all systems and, perhaps, optional components.
Your system was configured at the factory, based on your order.
The following sections describe base system components and options in
tum.

1.2.1 Base System Components
Base system components include the following:
•

Central processing unit (CPU)

•

Console serial line unit (SLU)

•

Main memory

•

Ethernet controller

•

Mass storage devices and controllers

•

Power supplies

•

Fans

1.2.1.1 Central Processing Unit (CPU)

The central processing unit (CPU) controls the execution of all instructions
and processes. The CPU circuits contain the logic, arithmetic, and control
functions used by the system.
1.2.1.2 Console Serial Line Unit (SLU)

Each system has a serial line unit connecting the console terminal to the
CPU module. The SLU connector (a modified modular jack) is located
on the CPU cover panel. The console serial line provides a means of
communicating with the CPU.

1-18

MicroVAX 3400 VAXserver 3400 Operation

1.2.1.3 Main Memory
Main memory provides the physical storage area for data and instructions
used by the CPU. When you start your system, the operating system is
loaded into main memory. Application programs must also be loaded into
memory.
When the system cannot load everything into memory at once, it reads
in units of data called pages (512 bytes of data) from disk. A large main
memory increases the efficiency of processing, since fewer pages must be
copied to and from the disk. Each configuration comes with a standard
memory option that you can upgrade to increase efficiency.
The contents of memory are volatile. This means they are lost when you
tum off power to the system. Use mass storage devices, such as fixed disks
and tape cartridges, to store software and data permanently.
Network Controller

A network controller is on the CPU module. The system can be connected to
an Ethernet network by either a standard transceiver cable or a ThinWire
cable. Connections for both types of cables are on the CPU cover panel.

1.2.1.4 Mass Storage Devices and Controllers
Mass storage devices record data on magnetic media. The data recorded is
not lost when you turn off the system, but can be altered or erased if you
record over the data. Use mass storage devices to store data and software
permanently. When the data or software is needed, the CPU copies it from
the mass storage device into main memory. The two primary types of mass
storage devices are fixed disks and devices with removable media, such as
tape cartridges.
Fixed-Disk Drives

Fixed-disk drives are installed in your system. They provide large-capacity
storage for software and data files, as well as rapid access to the data by
the CPU. Your system may have multiple fixed-disk drives.
Devices with Removable Media

Devices with removable media, such as disk packs, tape cartridges, and
tapes, are used as both input and output devices. You use them as input
devices when you install software or copy data to your system. Tape
cartridges are the primary media for loading software. You use these
devices as output devices when you copy software or data from your system.
You can copy individual files or programs, or you can copy (back up) the
contents of an entire fixed disk. Tapes and disk packs are commonly used
to archive data from systems.

System Overview

1-19

Mass Storage Controllers

All mass storage devices require a controller, a device that controls activity
between the CPU and the mass storage devices. The controller for each
RF30 fixed-disk drive is built-in to the drive. The CPU communicates to
the RF30 drives through an adapter on the CPU module. The controller for
the TK70 tape drive (the TQK70) is a module installed to the left of other
modules in the card cage.
1.2.1.5 Power Supplies

The system has two power supplies. The primary power supply provides
power to modules installed in slots 1-6, one or two mass storage devices
(the TK70 tape drive and one RF30 disk drive), and the two fans. The
secondary power supply provides power to modules installed in slots 7-12
and a second or third RF30 if present.
1.2.1.6 Fans

Two fans located near the bottom of the system draw in air from the top of
the system and pull it down through the modules and out the bottom. The
speed of the fans varies, depending on the surrounding room temperature.
To reduce the load on the fans, keep the system away from heat sources.

1.2.2 Optional Components
System options can include multiples of comyonents that are part of the
base system (for example, additional memory modules or disk drives) and
the following kinds of options:
•

Communications controllers

•

Real-time controllers

•

Printer interfaces

1.2.2.1 Communications Controllers

Besides the console serial line, most systems have additional communications controllers for connecting additional terminals, and for communicating with other systems over telephone or network lines. Communications
controllers provide standard interfaces between peripheral devices and the
system. Many communications controllers provide support for multiple
data lines.
The following types of communications controllers are available:
•

Asynchronous serial controllers

•

Synchronous serial controllers

1-20

MicroVAX 3400 VAXserver 3400 Operation

•

DECservers

•

Network controllers

Serial controllers transmit data one character at a time. A device at the
transmitting end breaks bytes of data into bits. A device at the receiving
end assembles incoming bits into bytes of data.
Asynchronous Serial Controllers

Asynchronous serial controllers provide low-speed connections between
peripheral devices and the system. Asynchronous communication between
the system and the peripheral depends on recognition of a pattern of start
and stop bits, not on a time interval.
Asynchronous serial controllers may be divided into those without modem
support and those with modem support.
You use serial controllers without modem support to connect additional
terminals and printers to your system. For example, the CXA16 module
provides connections for up to 16 serial lines with no modem support.
NOTE: Printers equipped with a microprocessor (intelligent printers) may
require modem control signals to function correctly. Do not attach a printer
requiring modem control signals to a controller with no modem support.
Check your printer documentation to determine the proper communications
interface for your printer.

Communications controllers with modem support allow you to communicate
over telephone lines. With a modem connected to your system, you can
access other computers and you can dial into your system from a remote
terminal or computer.
Computers transmit digital signals, while telephone lines (with the
exception of digital leased lines) transmit analog signals. When two
computers communicate over telephone lines, a modem is required at both
the transmitting and receiving end of the line. At the transmitting end, the
modem converts digital signals from the computer (or terminal) to analog
signals prior to transmission over telephone lines. At the receiving end,
another modem converts the analog signals from the telephone line back
into digital signals the computer can process.
The degree of modem support depends on the number of modem control
signals recognized by the device. Full modem support (according to
DIGITAL standards) requires recognition of eleven signals. The CXY08
module supports up to eight serial lines with full modem support.

System Overview

1-21

Synchronous Serial Controllers

Synchronous serial controllers provide high-speed connections between
systems. Communication between synchronous devices depends on time
intervals that are synchronized before transmission of data begins.
Synchronous devices can also have modem support.
DECservers

DECservers are terminal servers (a combination of hardware and software
that allow you to connect multiple terminals or printers to hosts in an
Ethernet Local Area Network (LAN).
Terminal servers perform the functions of traditional data terminal
switches but multiplex the lines over the Ethernet. Using a DECserver
offioads communications processing from the host system.
Network Controllers

Network communications controllers allow you to connect to an Ethernet
local area network or other network types. With a network connection
and appropriate DECnet software, you can use network services, such as
mail; access data stored on other systems; perform operations, such as
editing and printing on remote systems; and share resources, such as laser
printers. The network controller function for your system is implemented
on the CPU module.
1.2.2.2 Real-Time Controllers
Real-time controllers interface with devices that monitor or control
particular processes, for example, laboratory equipment or manufacturing
equipment connected to the system. Typically, real-time controllers are
parallel devices, not serial devices. Parallel devices transmit more than
one bit of information simultaneously.
1.2.2.3 Printer Interfaces
Some printers require specific interfaces to communicate with the system.
For example, the LGOI and LG02 require the LPVll-SA interface.
1.2.2.4 Other Available Options
Your system arrives configured with the options you ordered. As your needs
change, you can add more options. Your DIGITAL sales representative can
advise you on available options. Micro VAX 3400 VAXserver 3400 Technical
Information describes the options currently available for MicroVAX and
VAXserver 3400 systems. DIGITAL provides installation for additional
options that you order.

1-22 MicroVAX 3400 VAXserver 3400 Operation

1.3 Dual-Host Capability (VMS Systems Only)
CAUTION: Before building a dual-host configuration, consult your
DIGITAL servrce representative and reference your system warranty. The
terms of your warranty may be violated if you attempt to configure these
systems yourself.

A Digital Small Storage Interconnect (DSSI) disk drive, such as the RF30,
has a built-in multihost capability that allows it to connect to more than
one DSSI host adapter. Since the DSSI adapter is located on the KA640
CPU module, two KA640-based systems can be connected to the same DSSI
bus.
Using an external DSSI cable, any two KA640-based systems (MicroVAX
3400, VAXserver 3400, MicroVAX 3300, VAXserver 3300) can be connected
to form a dual-host configuration. Figure 1-13 shows a possible dual-host
configuration.
NOTE: Dual-host capability is only supported under VMS when the two
systems are configured into the same VAXcluster.

The benefits of a KA640-based dual-host configuration are;
•

VAXcluster features such as shared data across systems and satellite
nodes.

•

Higher system availability - if one of the KA640-based systems is
unavailable, for example, due to software update or system malfunction,
the satellites booted through it are able to continue operating through
the other KA640-based system. This process is described in more detail
below.

The primary application for such a configuration is a VAXcluster system.
The simplest dual-host configuration, for example, is to configure one
system disk to be used as the system disk by both KA640-based machines.
The system disk physically resides in one enclosure, however, both systems
have equal access to the disk and to any other DSSI mass storage device
in either enclosure.

System Overview

1-23

Figure 1-13:

KA640-Based Dual-Host Configuration

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EXTERNAL
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MLO-000684

1-24 MicroVAX 3400 VAXserver 3400 Operation

If one of the KA640 CPU modules fail, all satellite nodes booted through
that KA640 lose connections to the system disk. Each satellite node knows,
however, that the system disk is also available through a second path that of the remaining KA640 module. The satellite nodes establish a new
connection through the other system and continue operation.
To increase system availability, more redundancy may be configured into

a configuration. This can be done in a dual-host configuration by using
two system disks (one for each boot node). In the event of one system disk
failure, the remaining system disk would continue to serve one KA640based system and the satellite nodes booted through it. As with any
VAXcluster, however, a second system disk improves availability while
increasing system management tasks.
To build a dual-host configuration, perform the following steps:

1. Form a VAXcluster configuration. If your systems are not already
clustered, you must cluster them. For more information, find the VMS
VAXcluster manual that is part of the VMS documentation. If this
manual is not available, contact your DIGITAL representative.

2. Obtain an external DSSI cable which connects the two system
enclosures. Order this through your DIGITAL representative.
NOTE: If you have ordered a tapeless MicroVAX or VAXserver 3300
or 3400 system, an external DSSI cable is included with your system
shipment.

3. Change the DSSI node address of one system's KA640 CPU module.
CAUTION: This should be performed by a qualified DIGITAL service
professional.
Contact your service representative to schedule an
appointment.

4. Change the Unit J.D. plugs that identify the RF30 disk drives to the
system. (Supplemental Unit I.D. plugs are included with your system.)
When two systems are connected together, one system's RF30s may
need to be renumbered using different Unit I.D. plugs. (Each device on
a DSSI bus must have a unique address.) For instructions on how to
change a Unit I.D. plug, refer to the section on RF30 Disk Drives, in
Chapter 3 of this manual.
NOTE: The DSSI bus supports eight devices / adapters. With two DSSI
adapters, the dual-host configuration supports a maximum of six DSSI
devices.

System Overview 1-25

Chapter 2

Using the System
This chapter describes how to use your system once the system software
has been installed.

2.1 Before You Use a New System
This chapter assumes that your system has been properly installed by
a DIGITAL service representative. Installation includes running the
diagnostic software shipped with your system and installing the base
operating system. To install operating system options or layered products,
see the instructions in your system software installation manual or layered
product installation manual. Some of the instructions may require you to
remove the front panel of the system to change switch settings.
The remainder of this chapter assumes that system software has been
installed.

2.2 Switch Settings
Switch settings vary, depending on the operation being performed. The next
two sections describe switch settings for normal and for special operations.
Set the switches according to your needs.

2.2.1 Normal Operation
Switch settings for normal operation are the following:
•

The Halt button on the mass storage control panel (Figure 1-8) is set
to out (not lit).

•

The Break EnablelDisable switch on the CPU cover panel (Figure 1-10)
is set to disable (down position). Once system software is installed,
DIGITAL recommends you run your system with break disabled to
prevent the user of the console terminal from inadvertently halting
the system by pressing IBreak I on the console terminal. Halting the
system causes all activity to stop. With break disabled, your system
automatically boots system software when powered up.

Using the System

2-1

CAUTION: Pressing in the Halt button on the mass storage control panel
halts the system regardless of the setting of the Break Enable / Disable
switch on the CPU cover panel.

•

The Power-Up Mode switch on the CPU cover panel (Figure 1-10) is
set to Run (indicated by an arrow).

•

The baud rate switch, located on the inside of the CPU cover panel (see
Technical Information) is set to 9600. If you need to change the baud
rate, for example, to use a non-DIGITAL terminal, you must remove
the CPU cover panel. Instructions on changing the baud rate are found
in Technical Information.

•

The Write-Protect button for each RF30 fixed-disk drive (Figure 3-1) is
set to out (not lit).

•

The Ready button for each RF30 drive (Figure 3-1) is out (lit). This
setting makes the drive available for use.

2.2.2 Special Operation
-

Certain operations require that you change some of the normal operating
settings.
If you need the ability to halt the system from the console terminal,
for example, when installing system software or performing certain
types of backup, set the Break EnablelDisable switch to enable (up
position). This allows you to halt the system by pressing IBreakl on the
console terminal.

•

NOTE: When you change the Break Enable / Disable switch from one
setting to the other, you must activate the new setting by resetting the
system. Th reset the system, press the Reset button on either power
supply. All processes will be interrupted.

If your system has been powered off for more than seven days, the

•

battery unit that saves the system clock and the language selection may
be depleted. Each time you power-up the MicroVAX 3400 or VAXserver
3400 system, the CPU determines whether or not the battery power
is sufficient. If the battery power is depleted, the Language Selection
Menu appears, as shown in Figure 2-1.

2-2 MicroVAX 3400 VAXserver 3400 Operation

Figure 2-1:

Language Selection Menu

KA640-A T3.4-2 VMS 2.3
1) Dansk
2) Deutsch (Deutsch1and/Osterreich)
3) Deutsch (Schweiz)
4) English (United Kingdom)
5) English (United States/Canada)
6) Espanol
7) FranQais (Canada)
8) FranQais (France/Belgique)
9) FranQais (Suisse)
10) Italiano
11) Nederlands
12) Norsk
13) Portugues
14) Suomi
15) Svenska
(1 .. 15):

Select a language by typing in the number listed next to the language.
If the Power-Up Mode switch is set to Run Mode (indicated by an arrow),
then the language selected is saved and is automatically used during
subsequent reboots of the system.
In addition to the Language Selection Menu, the system issues a list of
bootable devices and prompts you to select a device from the list.
NOTE: If the Power-Up Mode switch is set to Language Inquiry Mode
(indicated by the human profile), the system will prompt for the language
at each power-up.

If you do not type a device name within thirty seconds, the system boots

by default from the Ethernet adapter, ESAO.
If you have typed in a device name within thirty seconds, the system
boots from that device. The system will continue to autoboot from that
device each time you turn it on unless a new default device is assigned.
NOTE: Selecting a default boot device other than the Ethernet adapter,
ESAO, is not appropriate for diskless and tapeless systems which must
boot software over the network.

Once the system is booted, reset the system clock as described in your
system software manual.

Using the System 2-3

If you want data on a particular fixed disk to be write-protected, you must
set the Write-Protect switch to in (glows).

NOTE: Disks containing system software and user accounts must remain
write-enabled. Disks containing applications or sensitive data may be writeprotected.

2.3 Turning On the System
Once you have set the switches correctly, you are ready to turn on the
system. The sliding window must be fully open. If the window is not open,
turn the key to position 3 and lower the window.
Turn on the system as follows:
1. Turn on the console terminal and wait for it to complete its self-tests.
2. Turn on the system by setting the power on/off switch to 1. The switch
glows to indicate power to the system.
When you turn on the power, you should see the indications listed in
Table 2-1.

Table 2-1:

Normal Power-On Indications

Indicator

Normal Indication

On/Off switch

Glows amber

System DC OK light

Glows green

RF30 Ready lights

Glow green steadily within 20
seconds

TK70 tape drive indicator lights

Orange, yellow, and green lights
glow during self-tests. The yellow
light blinks alone for several
seconds and then the green light
glows steadily.

If you do not observe the indications in Table 2-1, refer to MicroVAX
Troubleshooting and Diagnostics.
Every time you turn on your system, it runs a series of self-tests on the
CPU and memory.
The console terminal first displays a line of information identifying the
CPU, the version of the microcode, and the version of VMB - the primary
bootstrap program. In the sample screen shown in Figure 2-2, the CPU
is identified as a KA640-A, the version of the microcode is T3.42 and the

2-4

MicroVAX 3400 VAXserver 3400 Operation

version of VMB is 2.3. These version numbers may differ from those on
your system. The console terminal then displays a countdown as the system
tests itself. When the self-tests are successful, the system either autoboots
system software or goes into console mode, as described in Sections 2.4.1
and 2.4.2. When your system detects an error during its self-tests, it
displays an error summary consisting of hexadecimal numbers. A DIGITAL
service representative can use the error summary to diagnose the system.
Depending on the type of error, one or more error summaries may display
on the console terminal. A sample error summary is shown in Figure 2-2.
Figure 2-2:

Sample Error Summary

KA640-A T3.4-2 VMS 2.3
Performing normal system tests.
41. .40 .. 39 .. 38 .. 37 .. 36 .. 35 .. 34 .. 33 .. 32 ..
?58 2 01 FF 00 0000
P1=00000000
P6=00000001
rO=00000054
r5=20100001

P2=00000000
P7=00000000
r1=20100100
r6=7DDDE3FF

P3=00000000
P8=2004E4D4
r2=2010C380
r7=20084600

P4=00000000 P5=00000000
P9=201406B4 P10=20053510
r3=0000001C r4=20100005
r8=2010E3EO ERF=800001CO

Normal operation not possible.

»>

Ifpossible, print out the error summary and give it to your DIGITAL service
representative.

2.4 Booting the System
At power-on, the MicroVAX or VAXserver 3400 system can be set to
automatically boot (autoboot) itself, or you can manually boot the system
from console mode. The Break EnablelDisable switch setting determines
how the system boots.

2.4.1 Autobooting the System
When the Break EnablelDisable switch is set to disable (the normal
operating setting), the system runs self-tests and, on completion, attempts
to load system software.
Selecting a Boot Device
When attempting to load system software, the system does not test all
devices in search of bootable software. Rather it looks for a previouslyselected boot device.

Using the System

2-5

If you have not selected a boot device, the system issues a list of bootable
devices and prompts you to select a boot device from the list, as shown in
Figure 2-3.
Figure 2-3: Successful Power-On to List of Bootable Devices
KA640-A T3.4-2, VMS 2.3

Performing normal system tests.
41. .40 .. 39 .. 3S .. 37 .. 36 .. 35 .. 34 .. 33 .. 32 .. 31 .. 30 .. 29 .. 2S .. 27 .. 26 ..
25 .. 24 .. 23 .. 22 .. 21. .20 .. 19 .. 1S .. 17 .. 16 .. 15 .. 14 .. 13 .. 12 .. 11. .10 ..
09 .. OS .. 07 .. 06 .. 05 .. 04 .. 03 ..
Tests completed.
Loading system software.
No default boot device is set.
Devices:
--DIAO (RF30)
--MUAO (TK70)
--ESAO (OS--00--2B--OS--E7--A4)
--DEVICE? [ESAO]:

If you do not type a device name within thirty seconds, the system boots
by default from the Ethernet adapter, ESAO.
If you type in a device name within thirty seconds, the system boots from
that device.
When the boot device is identified, the number "2" displays on the screen.
As the system begins booting from a device, the countdown continues from
1 to o.
Once you have selected a boot device from the list of bootable devices, the
system boots from that device at each power-up (as long as the system is
set to autoboot).
Figure 2-4 shows a successful power-on and automatic boot when the
device, DIAO, has been selected as the boot device.
When a boot device is identified, the system autoboots from that device
each time you turn it on, until you do one of the following:

2-6

MicroVAX 3400 VAXserver 3400 Operation

Figure 2-4:

Successful Power-On and Automatic Boot

KA640-A T3.4-2, VMB 2.3

Performing normal system tests.
41. .40 .. 39 .. 38 .. 37 .. 36 .. 35 .. 34 .. 33 .. 32 .. 31 .. 30 .. 29 .. 28 .. 27 .. 26 ..
25 .. 24 .. 23 .. 22 .. 21. .20 .. 19 .. 18 .. 17 .. 16 .. 15 .. 14 .. 13 .. 12 .. 11. .10 ..
09 .. 08 .. 07 .. 06 .. 05 .. 04 .. 03 ..

Tests completed.
Loading system software.
(BOOT/R5:0 CIAO)

2 ..
--CIAO
1 .. 0 ..

•

Change the boot device through one of the following methods:
1. Using the SET BOOT device name command from console mode.

2. Selecting a new boot device when the bootable device list appears
with the system in Language Inquiry Mode.
•

Change the setting of the Break EnablelDisable switch to enable (dot
inside the circle). (If you do so, the system will not autoboot but will
enter console mode after completing self-tests.)

NOTE: Selecting a default boot device other than the Ethernet adapter,
ESAO, is not appropriate for diskless and tapeless systems which must boot
software over the network.
Using the SET BOOT Command
The SET BOOT command identifies the boot device to the system. To
use the command, put the system into console mode by pressing the Halt
button twice. At the »> prompt, enter "SET BOOT device-name." For
example, "SET BOOT ESAO" sets the system default boot device to be the
on-board Ethernet controller. Once you have selected a boot device, the
system autoboots from that device each time you turn it on.

Using the System 2-7

To determine the name of the boot device refer to Table 2-2.
Table 2-2: Device Names
Controller Type

Controller

Device Name

DSSI

On-board CPU

Dlmn1

TMSCP

TQK70

MUmn

PROM

MRVll

PRAn

Ethernet adapter

On-board CPU

ESAn

1m = MSCP controller designator (A = first, B = second, etc.)
n = unit number

For more information about the MicroVAX 3400 system's booting process,
refer to MicroVAX 3400 VAXserver 3400 Technical Information.

2.4.2 Booting the System from Console Mode
When the Break EnablelDisable switch is set to enable, the system
powers up to console mode (indicated by the >>> prompt) after successfully
completing its self-tests. Figure 2-5 shows a successful power-on to console
mode.

To load system software from console mode, you must use the BOOT
command (BOOT device-name) at the »> prompt. For example,
»>BOOT MUAO
tells the system to boot software from a cartridge in the TK70 tape drive.
Software manuals may instruct you to power up with break enabled and to
use the BOOT command.

2.5 Using the System
Once the system software is loaded, the first display for the system software
appears on the console terminal after a few seconds. That display is
described in the system software documentation.
You are now ready to use the system. Refer to the system software manual
and application manual for more specific instructions on using the system.

2-8

MicroVAX 3400 VAXserver 3400 Operation

Figure 2-5: Successful Power-On to Console Mode
KA640-A T3.4-2, VMS 2.3
Perfo~ing

normal system tests.

41 .. 40 .. 39 ... 38 .. 37 .. 36 .. 35 .. 34 .. 33 .. 32 .. 31 .. 30 .. 29 .. 28 .. 27 .. 26 ..
25 .. 24 .. 23 .. 22 .. 21. .20 .. 19 .. 18 .. 17 .. 16 .. 15 .. 14 .. 13 .. 12 .. 11. .10 ..
09 .. 08 .. 07 .. 06 .. 05 .. 04 .. 03 ..

Tests completed.

»>

Your system software manuals cover the following:
•

Installing software on your system

•

Running software to perform tasks

•

Making and restoring backup copies of system software or data files

•

Accessing devices and utilities in your system

2.6 Turning Off the System
Do not turn off your system unless it requires maintenance or you know of
a planned power outage.
CAUTION: Turning off your system without following the shutdown
procedure described in your system software manuals may result in loss
of data.

Once you have completed the recommended procedure, you can turn off
your system by setting the on/off switch to o.

2.7 Halting the System
Halting the system interrupts all processes and returns control to the
console program. You may need to halt the system during software
installation. Or, you may want to boot the system from another device; for
example, a tape cartridge containing MicroVAX Diagnostic Monitor (MDM)
software.
CAUTION: Halting your system without following the shutdown procedure
described in your system software manuals may result in loss of data.

You can halt the system in two ways. You can press the Halt button twice
- in to halt the system and out to enter console mode. Or you can press
the IBreakl key on the console terminal, if the Break EnableIDisable switch on

Using the System

2-9

the CPU cover panel is set to enable. When the console mode prompt »>
appears on your screen, the system is halted.
NOTE: When you change the Break Enable / Disable switch from one setting
to the other, you must activate the new setting by resetting the system. To
reset the system, press the Reset button on either power supply. All processes
will be interrupted.

If you inadvertently halt the system, type "c IRetumf' at the console prompt:
»>c. The processes interrupted by the halt continue.
With dual-host configurations, you can halt one processor without affecting
the other. As long as the system disk is spinning and on-line, the second
system continues to operate normally.

2.8 Restarting the System
CAUTION: Do not press the Restart button while in console mode. Doing so
destroys the system state. You will not be able to continue normal operation.

Restarting the system allows you to reboot the system software without
performing the start-up tests. For example, if your system is hung, you
can press Restart and the system reboots.
With a dual-host configuration, you can restart one processor without
affecting the other. As long as the system disk is spinning and on-line,
the second CPU continues to operate normally.

2.9 Resetting the System
Resetting the system allows~ you to return the system to a power-on
condition without turning it off. The usual power-on self-tests are run.
Resetting the system aborts all current and pending operations.
CAUTION: Resetting your system without following the shutdown procedure
described in your system software manuals may result in loss of data.

You reset the system by pressing the Reset button on the power supply.

2-10 MicroVAX 3400 VAXserver 3400 Operation

Chapter 3

Using System Options
This chapter describes how to use options that may already be part of your
system, or that you can add to your system. The following types of options
are covered:
•

Mass storage devices and controllers

•

Communications controllers

•

Real-time controllers

•

Printers

NOTE: Some of these options may not be appropriate for VAXserver 3400
systems. Contact your DIGITAL representative if you have any questions
about whether a specific option is appropriate for your system.

3.1 Mass Storage Options
The following mass storage options are available for the MicroVAX and
VAXserver 3400 systems:
•

RF30 fixed-disk drive

•

TK70 tape drive

NOTE: In addition, the RV20 Optical Disk Subsystem and the TS05 tape
drive can be attached to the Micro VAX 3400 or VAXserver 3400. If your
system contains an RV20 or a TS05 drive, refer to the device user's guide or
owner's manual for instructions on how to operate the device.
This chapter describes how to use the controls for mass storage devices. In
the case of removable media, it also describes how to insert and remove
the media. To use any mass storage device, you must properly identify
the device to the operating system and use appropriate operating system
commands. Refer to your system software documentation for details.

Using System Options

3-1

3.1.1 RF30 Fixed-Disk Drives
The RF30 fixed-disk drive provides high-volume mass storage for your
MicroVAX 3400 or VAXserver 3400 system. Your system may have two
or three RF30 drives.
When your system has multiple disks, DIGITAL recommends that you
separate them according to function. For example, if your system has two
disks, you may want to use them as follows:
•

Disk 0 contains the operating system and applications installed on the
system.

•

Disk 1 contains work areas for each user with an account on the system.

The storage capacities and other specifications of the RF30 fixed-disk drive
are listed in MicroVAX 3400 VAXserver 3400 Technical Information.
RF30 Fixed-Disk Drive Controls

Controls for the RF30 are located behind the sliding window on the front
of the system. To access the controls for the RF30 drives, you must turn
the key to position 2 or 3 and slide down the window. Figure 3-1 shows
the controls and indicators for the RF30 fixed-disk drives.

3-2 MicroVAX 3400 VAXserver 3400 Operation

Figure 3-1:

RF30 Disk Drive Controls and Indicators

FIXED-DISK(S) CONTROLS
AND INDICATORS

DRIVE

Unit Number

Q]~~

Fault

c::::::J

Wrlle-

GlBB
BBB

Protect

Ready

SYSTEM

c::::::J

I Gl Gl
Restartl

Roo

Halt

c::::::J

1c::::::J1

MLO-000720

The system has controls and indicators for three RF30 fixed-disk drives.
Each RF30 has the following controls and indicators arranged in a column
on the control panel.
•

Unit LD. plug

•

Fault light

•

Write-Protect button

•

Ready button

Unit LD. plugs identify the unit number of the drives to the system. The
factory configuration identifies the rightmost drive as Disk 0, the center
drive as Disk 1, and the leftmost drive as Disk 2.
Table 3-1 lists the function of each RF30 fixed-disk drive control.

Using System Options

3-3

Table 3-1 : RF30 Controls and Indicators
Control

Position

Function

Fault

Lit

Indicates an error condition within the disk
drive.

Not lit

Indicates an error-free condition within the
disk drive.

In (lit)

Disk is write-protected. Prevents system
software from writing on the disk.

Out (not lit)

Disk is not write-protected.
Normal
position for software operation. System
software is free to read or write information
on the disk.

Out

The drive is online. When the drive is
available for use, the green indicator light
in the switch is on. When the drive is being
used, the green indicator light is off.

The drive is offline and cannot be accessed.
The green indicator light cannot be lit when
the Ready button is in.

Write-Protect

Ready

The Write-Protect button controls whether the system can write data to
the disk drive. The system can read from the disk regardless of the setting
of the Write-Protect button. When the Write-Protect button is out (not
lit), the system can write to the disk. Your system disk (the disk containing
system software) and disks containing work areas for users should be writeenabled, the normal operating setting.
If you want to write-protect a disk containing sensitive data that you do
not want changed or accidentally erased, set the Write-Protect button to in
(lit).
Changing the Unit 1.0. Plugs

Spare unit I.D. plugs are supplied with your system. When two MicroVAX
3300 and/or 3400 systems are configured in a dual-host configuration, you
use the spare Unit I.D. plugs to renumber the unit numbers of one system's
disk drives.
The I.D. plugs have prongs on the back that indicate the unit number of
the drive. When changing the order of I.D. plugs or adding new I.D. plugs,
the new unit number is identified to the system once you have cycled power
on the system.

3-4 MicroVAX 3400 VAXserver 3400 Operation

NOTE: If the Unit J.D. plug for an RF30 is changed while the system is
powered on, the system must be powered off, then on again, before the new
unit number is recognized.

To remove an I.D. plug, grasp it firmly and pull it out. To insert an I.D.

plug, align the two center prongs with the two center slots and press it in.
See Figure 3-2.
,
Figure 3-2:

Inserting and Removing RF30 Unit 1.0. Plugs

3.1.2 TK70 Tape Drive
The TK70 tape drive is located behind the sliding window on the front of
the system. To use the drive, move the key to position 2 or 3 and slide down
the window.
The TK70 tape drive holds one removable magnetic tape cartridge. The
drive can read data Written on either a COMPACTape II or COMPACTape
cartridge. You can identify the type of cartridge by the label on the
cartridge.

Using System Options 3-5

You can use a COMPACTape II or COMPACTape cartridge as an input
device to load software or data into your system. The TK70 drive can read
data on both types of cartridges, written by either a TK70 drive or a TK50
drive. (The TK50 drive records data in a format different from that of the
TK70.)
You should use a COMPACTape II as an output device to make copies
or backups of software or data. The TK70 drive cannot write to a
COMPACTape II or COMPACTape that has been previously written by a
TK50 tape drive.
TK70 Tape Drive Controls

The tape drive has two primary controls: the cartridgeinsertirelease handle
(subsequently referred to as "the handle") and the Unload button. You use
the handle to insert or remove cartridges and lock them into position. Pull
the handle open to insert or remove a tape cartridge. Push the handle
closed to lock a tape cartridge into position and load the tape.
You use the Unload button to rewind and unload the tape. Unloading and
rewinding can also be controlled by software. Refer to your system software
manuals for appropriate commands.
The drive also has three indicator lights that let you know the status of the
drive.
•

Orange light (Write-Protected): A steady orange light indicates that the
cartridge is write-protected.

•

Yellow light (Tape in Use): A steady yellow light indicates that the tape
is loaded. A blinking yellow light indicates that the tape is in motion.

•

Green light (Operate Handle): A steady green light indicates that you
can move the handle to insert or remove a tape. A blinking green light
indicates a cartridge load fault. You can also move the handle when
the green light is blinking.

All three lights blinking simultaneously indicates a fault condition.
Figure 3-3 shows the TK70 tape drive with the controls and indicator lights
labeled.
To operate the drive properly, you must carefully monitor the indicator
lights. The instructions for inserting and removing cartridges, which
appear later in this section, tell you what should happen at each step. A
table at the end of the section summarizes light and control combinations.

3-6 MicroVAX 3400 VAXserver 3400 Operation

Figure 3-3:

TK70 Tape Drive
YELLOW
ORANGE

GREEN
/

\)l~P
[1

til I
'U

UNLOAD

HANDLE

MLO-OOO687

3.1.2.1 Design of the Drive
The TK70 tape drive operates like a reel-to-reel tape deck. Inside the drive
is a take-up reel with a leader attached. Inside the cartridge is a single
reel containing the magnetic tape. When you insert the cartridge and push
in the handle, the leader in the drive automatically couples with the leader
in the cartridge, and the tape winds onto the take-up reel. The coupling
and winding process is called loading. When the automatic loading process
is complete, the tape is ready to use.
Once the cartridge is loaded, you cannot remove it without rewinding and
uncoupling the leaders, a process called unloading. Even if you have not
used the tape, you must unload it before you can remove the cartridge.
When you press the Unload button, the tape rewinds into the cartridge
and the leaders uncouple.

Using System Options

3-7

3.1.2.2 Labeling a Tape Cartridge

When recording data on a cartridge, label its contents.
For your
convenience, a slot for the label is provided on the front of the cartridge.
Write the identification on the label and insert the label in the slot on the
front of the cartridge, as shown in Figure 3-4. The label is visible when
the tape is in the drive.
Figure 3-4:

Labeling a Tape Cartridge

LABEL
SLOT

LABEL

MLO-000688

To indicate that the tape was recorded on a TK70 tape drive, check the box
labeled 296MB. The 95MB box is used for tapes recorded on a TK50 drive.
NOTE: Do not write on the tape cartridge or attach labels to the top, bottom,
or sides of the cartridge.
3.1.2.3 Write-Protecting a Tape Cartridge

Write-protecting a tape cartridge prevents accidental erasure of information
stored on the tape. You can write-protect a tape cartridge in two ways:
•

Set the write-protect switch on the cartridge to the write-protect
position.

•

Write-protect the cartridge by using operating system commands
described in your system software manuals.

Your system can read information on the tape regardless of the position of
the write-protect switch or whether writing is software-disabled. However,

3-8 MicroVAX 3400 VAXserver 3400 Operation

the system cannot write data to the tape when the write-protect switch is
set to the write-protect position, or when writing is software disabled.
When you use a cartridge to install software, make sure the cartridge is
write-protected. Two icons on the switch indicate the write-protect status,
as shown in Figure 3-5. An orange rectangle is visible when the switch is
in the write-protect position. If you do not see an orange rectangle, slide
the switch toward the label slot.
Figure 3-5:

Tape Cartridge Write-Protect Switch

NOT WRITEPROTECTED

WRITEPROTECTED

MLO-o00689

When you insert a write-protected cartridge into the drive, the orange
indicator light comes on. The system recognizes the tape as being writeprotected under anyone of the following conditions:
•

The write-protect switch on the cartridge is set to the write-protect
position.

•

An operating system command has write-protected the tape.

•

A tape recorded on a TK50 tape drive is inserted into the drive.

Removing write-protection depends on how the tape was recorded and
how it is write-protected. You cannot write-enable a tape recorded on a

Using System Options 3-9

TK50 tape drive either by moving the write-protect switch on the cartridge
or by using software commands. The TK70 drive always recognizes a
tape recorded on a TK50 drive as write-protected. You can remove writeprotection on tapes recorded on a TK70 drive as follows:
•

If the cartridge is write-protected only by the write-protect switch on
the cartridge and not the operating system, moving the switch to the
write-enabled position causes the orange light to go out at the end of
the executing command.

•

If the cartridge is write-protected only by a software command and
not the write-protect switch, removing the operating system restriction
causes the orange light to go out.

•

If the cartridge is write-protected by both the switch on the cartridge
and a software command, you must change the switch setting and
remove the operating system restriction.

When you use a COMPACTape II cartridge to make a backup copy of files,
make sure the orange write-protect light on the TK70 drive is off. If the
light is not off, check for any ofthe write-protect conditions described above.
Change the switch setting and/or operating system restriction as necessary.
Do not begin your operation until the orange light goes off.

3.1.2.4 Tape Cartridge Handling and Storage Guidelines
r

•

Do not touch the exposed surface of the tape.

•

Do not drop the tape cartridge. The impact from a fall can damage the
tape cartridge.

•

Allow new tapes to stabilize at room temperature for 24 hours before
using them.

•

Place an identification label only in the label slot on the front of the
tape cartridge.

•

Store tape cartridges in a dust-free environment.

3-10 MicroVAX 3400 VAXserver 3400 Operation

•

Keep tape cartridges away from direct sunlight, heaters, and other
sources of heat. Store tape cartridges in a stable temperature between
10° and 40° Celsius (50° and 104° Fahrenheit).

•

Store tape cartridges where the relative humidity is between 20 and 80
percent.

•

Keep tape cartridges away from magnets and equipment that generate
magnetic fields, such as motors, transformers, terminals, and audio
equipment.

•

Keep tape cartridges away from x-ray equipment.

3.1.2.5 Inserting a Tape Cartridge

Before you use the tape drive, make sure the system is turned on (the
power switch glows). During power-up, the TK70 drive runs self-tests that
last a few seconds. All three lights (orange, yellow, and green) come on
momentarily, then the yellow light blinks during the self-tests. At the
end of the tests, the yellow light goes off and the green light comes on,
accompanied by a short beep. The green light and the beep indicate that
you can move the cartridge release handle.
CAUTION: Move the handle only when the green indicator light is on.
Moving the handle while the yellow light is on could damage the drive.
If all three lights blink rapidly at any time, a fault condition exists. Press
the Unload button once. If the fault is cleared, the tape unloads. The yellow
light blinks during unloading, then the green light comes on. If the fault
is not cleared, the three lights continue to flash. Do not attempt to use
the tape drive or to remove the tape cartridge. Call your DIGITAL service
representative.

Using System Options

3-11

Use the following procedure to insert a tape cartridge (see Figure 3-6):
1. Pull the handle open.
2. Position the cartridge so the arrow on the cartridge faces left and points
toward the drive. Insert the cartridge into the TK70 tape drive until
you feel the cartridge lock into place.
3. Push the handle closed.
The green light goes off and the yellow light blinks as the tape loads.
When the yellow light glows steadily, the tape is ready to use.
NOTE: If the green light blinks rapidly when you push the handle
closed, the drive has detected a cartridge fault. Pull the handle open
and remove the cartridge. Use another cartridge.

3-12 MicroVAX 3400 VAXserver 3400 Operation

Figure 3-6:

Inserting a Tape Cartridge

1!i1i:fo";-~

GREEN
LIGHT
IS LIT

HANDLE

MLO-000690

Refer to your system software manual for instructions on how to use the
tape cartridge, for example, to load software or perform backup.

NOTE: If a cartridge is new, the drive performs a calibration sequence that
takes approximately 30 seconds when the drive receives the first command
from the operating system. The yellow light blinks rapidly and irregularly
during calibration.

Using System Options

3-13

3.1.2.6 Removing a Tape Cartridge

You must unload a tape before you can remove the cartridge from the tape
drive. Use the following procedure (see Figure 3-7):
1.

Press the Unload button. You can also issue a software command to
unload the cartridge. Refer to your system software manuals for the
appropriate command.
The yellow light blinks slowly, as the tape rewinds and unloads into the
cartridge. This may take up to 90 seconds.

2. When the yellow light goes off and the green light comes on (you also
hear a beep), pull the handle open.
CAUTION: Move the handle only when the yellow indicator light is off
and the green indicator light is on. Moving the handle while the yellow
light is blinking could damage the drive.

3. Remove the tape cartridge and store it in its container.
4. Push the handle closed.
The green light remains on, indicating that there is power to the drive and
that you can safely move the handle.
CAUTION: Remove the tape cartridge from the tape drive when the cartridge
is not in use or before you turn off the system. Failure to remove the cartridge
may damage the tape cartridge.

3-14

MicroVAX 3400 VAXserver 3400 Operation

Figure 3-7:

Removing a Tape Cartridge

UNLOAD
BUTTON

GREEN
lta!__~ LIGHT

IS LIT
YELLOW
LIGHT
BLINKS

GREEN

t;;;I!!I..-- LIGHT
IS LIT

MLO-OO0691

3.1.2.7 Summary of TK70 Tape Drive Controls and Indicator Lights

Table 3-2 summarizes the TK70 tape drive controls. Table 3-3 describes
the meaning of the indicator lights.

Table 3-2: TK70 Tape Drive Controls
Control

Position

Function

Handle

Open

Lets you insert or remove a tape after rewind and
unload operations are completed.

Closed

Locks tape in operating position and begins load
sequence.

Unload button

Momentary contact Rewinds and unloads the tape.
switch

Using System Options

3-15

Table 3-3: TK70 Tape Drive Indicator Lights
Orange

Yellow

Green

Condition

Off

No power to the tape drive.

Off

On steadily

Safe to move cartridge release
handle. Power is present.

Off

Blinking

Load fault. The cartridge leader
may be defective. Pull out the
handle and remove the cartridge.
Do not use the cartridge.

On/Off

On steadily

Off

Tape is loaded but not in motion.

On/Off

Blinking

Off

Tape is in motion.

On steadily/
blinking

Cartridge is write-protected.

Blinking

A fault is. occurring. Press the
Unload button to unload the tape
cartridge. If the fault is cleared,
the yellow light blinks while the
tape rewinds.
When the green
light comes on, you can move the
handle to remove the cartridge.
If the fault is not cleared, all
three lights continue to blink. Do
not attempt to remove the tape
cartridge.
Call your DIGITAL
service representative.

3.1.3 RV20 Optical Disk Subsystem
If your system contains an RV20 Optical Disk Subsystem, refer to theRV20
Optical Disk Subsystem Owner's Manual for instructions on how to operate
the device.

3.1.4 TS05 Tape Drive
If your system contains a TS05 tape drive, refer to the TS05 Tape Transport
System User's Guide for instructions on how to operate the device.

3.2 Communications Controller Options
The following types of communications controllers are available for the
MicroVAX 3400 and VAXserver 3400 systems:
•

Asynchronous serial controllers (with or without modem support)

3-16

MicroVAX 3400 VAXserver 3400 Operation

•

Synchronous serial controllers (with or without modem support)

•

Network controllers

3.2.1 Asynchronous Serial Controllers
The following asynchronous controllers are available for your MicroVAX
system, with and without modem support:
•

CXA16- I6-line multiplexer, Q-bus controller

•

CXB16- I6-line multiplexer

•

CXY08- 8-line multiplexer with modem control, Q-bus controller

•

DFAOI- 2-line controller with integral modems, Q-bus controller

•

DSRVB- 8-line terminal server, Ethernet device

3.2.1.1 Without Modem Support

Before using any peripheral device connected to a serial communications
controller, check the following:
•

Make sure the peripheral device is properly connected to the system.

•

Make sure the peripheral device is properly installed, plugged into an
appropriate power source, and turned on.

•

Make sure the peripheral device is properly set up. Set-up involves
choosing how the device operates. Some set-up choices are matters of
personal choice, for example, the number of columns that display on
a terminal screen. Others, like baud rate (a measure of the speed at
which data is transmitted over a data line), must match the system
setting if the peripheral device and system are to communicate. Refer
to your terminal or printer manual for complete set-up instructions.
Generally, the default settings for your terminal are acceptable.
While most default settings are acceptable, you should perform the setup procedure for your terminal to ensure appropriate set-up values.
The two examples below provide set-up instructions for VT300-series
and VT200-series terminals:
For VT300-Series Terminals:
1. Press !Set-Up! to display the Set-Up Directory screen.

2. Use the arrow keys to select the "Communications Set-Up" option
and press !Enter!.

Using System Options

3-17

3. Make sure the "Transmit Speed" option in the "Current Setting"
column is set to 9600. Use the left and right arrow keys to change
the setting.
4. Make sure the "Receive Speed" option in the "Current Setting"
column is set to "receive=transmit." Use the down arrow to move
the cursor to this option, and the left and right arrows to change
the setting.
5. Press !Select! to return to the Set-Up Directory screen.
6. Use the arrow keys to select the "Global Set-Up" option and press
!Enter!.

7. Select the option "Comm Port."
8. If the port in the "Current Setting" column is selected for "RS-232,"
press !Enter! to select the "DEC-423" port.
9. Press !Select! to return to the Set-Up Directory screen.
10. Use the arrow keys to select the "Save Current Settings" option.
Press !Enter! to save all current settings; then press !Set-Up! to exit the
Set-Up Directory.
For VT200-Series Terminals:
1. Press !Set-Up! to display the Set-Up Directory screen.

2. Use the arrow keys to select the "Default" option and press !Enter!.
Default correctly sets all values except transmit speed.
3. Use the arrow keys to select the "Comm" option and press !Enter! to
display the Communications Set-Up menu. ..
4. Use the arrow keys to select the "Transmit" option and, using !Enter!,
set the speed to 9600.
5. Use the arrow keys to select the "To Directory" option and press
!Enter!.

6. Use the arrow keys to select the "Save" option and press !Enter!; this
option stores the set-up values. Then press !Set-Up! to exit the Set-Up
Directory.
Your operating system may have other requirements for using serial
communications devices. Refer to your system software manual.

3-18 MicroVAX 3400 VAXserver 3400 Operation

3.2.1.2 With Modem Support

Using serial devices with modem support requires that you install two
modems: one connected to the system and one connected to the remote
terminal. Both must be connected to phone lines.
Before using modems with your system, check the following:
1. Make sure each modem is connected to the system.
2. Make sure the modem is properly installed and connected to a phone
jack.
.
3. Set controls on the modem according to instructions in the modem user's
guide.
Before using the modem connected to the remote terminal, check the
following:
1. Make sure the modem is properly installed and connected to a phone
jack.
2. Set controls on the modem according to instructions in the modem user's
guide.
3. Check the settings on the terminal attached to the modem. Depending
on the type of modem and the type of lines used, the baud rate may
be 300, 1200, or 2400. Other settings should be the same as those
described in the previous section.
Before using a line with modem support, you must set certain parameters
such as line speed. See your system software manuals for· details.

3.2.2 Synchronous Controllers
The following synchronous controllers are available for your MicroVAX
system:
•

DPVll- Single-line programmable controller

•

DSVll- Dual-line controller

•

KMV1A- Programmable communications interface, Q-bus controller

Before using a synchronous controller you must verify the following:
•

The system you want to communicate with has an appropriate
synchronous controller.
Synchronous communications require a
synchronous controller on both the transmitting and receiving system.

•

Both the transmitting and receiving systems must have supporting host
software installed. Synchronous communications operate under specific

Using System Options

3-19

protocols that define how data is interpreted. Two common protocols
are X.25 and PSI. Appropriate host software is required to interpret
the protocol.

3.2.3 Network Controllers
NOTE: The MicroVAX 3400 or VAXserver 3400 system contains an Ethernet
controller on the CPU module. This section is pertinent only if you require
use of a second Ethernet controller with your system.

Before using a network controller you must do the following:
1. Make sure the Ethernet cable (either standard transceiver cable or
ThinWire cable) is connected to the CPU cover panel. The light next to
the connector should be lit, indicating an active connection. If not lit,
move the Ethernet connector switch to the proper position.
2. Make sure the Ethernet cable is properly connected to the network. A
transceiver cable can be connected in one of the following ways:
•

To an H4000 transceiver located on a traditional Ethernet

•

To a Local Network Interconnect (DELNI), which can be connected
to a larger Ethernet or can serve to connect up to eight systems in
a local area network

A ThinWire cable can be connected as follows:
•

To a ThinWire Ethernet Multiport Repeater (DEMPR) or ThinWire
Singleport Repeater (DESPR), which can be connected to a larger
Ethernet or can serve to connect many systems in a local area
network

•

To an available connection on a T connector of other ThinWire nodes

3. Have the DECnet application installed on your system.
4. Register your node with the network manager so that your node is
recognized by other systems in the network.
Some software products, for example, Ethernet-based VAXcluster systems,
use the Ethernet hardware address of other systems to operate properly.
To find the hardware address of your Ethernet device, remove the front

panel of your system. The hardware address of your Ethernet device is
printed on a label on the bottom half of the CPU module.

3-20 MicroVAX 3400 VAXserver 3400 Operation

( .

You can also use the command SHOW ETHER from console I/O mode.
The hardware address of your Ethernet device displays on the terminal
as shown in the following example:

»>SHOW ETHER
08--00--2B--03--50--5C

Refer to your software manuals and DECnet manuals for other
requirements and further instructions on using a network connection.

3.3 Real-Time Options
The following real-time options are available for your MicroVAX system:
•

DRQ3B- High-speed interface with two unidirectional 16-bit data
channels

•

DRVIW- General purpose interface with one 16-bit input port, one 16bit output port

•

IEQll- DMA controller that connects a Q-bus to two independent buses

•

IBQOl- DMA controller that connects a Q-bus to RS-485 control

•

AAVll-S- Digital-to-analog converter with DMA capability

•

ADVll-S- Analog-to-digital converter with DMA capability

•

KWVll-S- Programmable clock that can count from one to five
frequencies

•

AXVll- Input/output circuit board for analog devices

•

ADQ32- Analog-to-digital converter with DMA capability

Before using a real-time controller, make sure the devices connected to the
controller are properly set up. Refer to the documentation for the real-time
device.

3.4 Printer Options
Before using a printer, make sure it is properly set up and passes any selftests. Verify that the printer is connected to an appropriate controller.
Some printers, such as the LGOI and LG02, require the LPVll-SA
interface. Other printers require modem control signals. Consult your
printer documentation for the interface requirements.
The MicroVAX 3400 and VAXserver 3400 systems have several printer
options available. Consult the Micro VAX 3400 VAXserver 3400 Technical
Information for a list of printers and printer interface requirements.

Using System Options

3-21

3.5 Adding New Options
If you have available slots, you may be able to add new modules to your
system. Possible limitations to adding new modules include the following:
•

Power limitations

•

Physical space limitations

•

Bus limitations (ac/dc loading)

Your DIGITAL sales representative can advise you about modules available
for your system and what you need to order. A DIGITAL service
representative should perform the installation, since the system must be
properly configured to work correctly.
CAUTION: Do not attempt to remove, rearrange, or install new modules.
Contact a DIGITAL service representative for assistance. If you want to
perform maintenance on your system, purchase the KA640 CPU Systems
Maintenance.

(

3-22 MicroVAX 3400 VAXserver 3400 Operation

Appendix A