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Document:	DECsystem 5900 Mass Storage Drawer Installation Manual
Order Number:	EK-DECMS-IN
Revision:	A01
Pages:	49
Original Filename:

OCR Text

5900DECsystem

Firet Printing, June 1982

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.

Any software 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.

Restricted Rights: Use, duplication, or disclosure by the U.S. Government is subject to
restrictions as set forth in subparagraph (cX1Xii) of the Rights in Technical Data and Computer
Software clause at DFARS 252.227-7013.

RIRD40, RRD50, RX, ThinWire, TK, TS.TU, TURBOchannel, ULTRIX, VAX, VAX DOCUMENT,

VMS. VT, and the Digital logo are trademarks of Digital kquipment Corporation.

FCC NOTICE: This equipment has been tested and found to comply with the limits for a
Class A digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to
provide reasonable protection against harmful interference when the equipment is operated in
a commercial environment. This equipment generates, uses, and can radiate radio frequency
energy and, if not installed and used in accordance with the instruction manual, may cause

harmful interference to radio communications. Operation of this equipment in a residential

area is likely to cause harmful interference, in which case users will be required to correct the
interference at their own expense.
This document is available in hard copy only.

51923

This document was prepared using VAX DOCUMENT, Version 2.1.

Contents
Preface

Mass Storage Drawer installation

1.2

Unpacking the Upgrade Shipment
Accessory Kit Contents
Consult Customer to Determine Configuration and

........................

Location
121

122
1.3
14

1.5

.......................................

Drawer Slot Location
Drawer Configuration

..........................

.........................

Powering Down the System
Removing Filler Panel(s)
Mass Storage Drawer Slides

1-3

1-3
1-5

1-5

........................

..........................

1-8

1-9

.......................

Assembling Mass Storage Drawer Slides
Installing Assembled Slides in Cabinet
1.6
Removing Devices from the Drawer
1.6.1
Mass Storage Drawer Version 1
1.6.1.1
Opening/Closing Mass Storage Drawer Version
151

..................

.......................................

1612

Removing/Replacing Devices in Mass Storage
Drawer Version 1
Mass Storage Drawer Version 2
Openiag/Closing Mass Storage Drawer Version

..........................

162

1.6.21

..................

.......................................

1622

Removing/Replacing Devices in Mass Storage
Drawer Version 2
Balancing the System
Installation of Drawer in the Cabinet

..........................

1.7
1.8
1.8.1
1.8.2

1.10
1.1

............................

................

Installation of the Version 1 Drawer
Installation of the Version 2 Drawer
Replacing the Devices in the Drawer
Pushing In and Securing the Drawer
Connecting Power and SCSI Cables

1-9
1-11

1-13
1-13
1-13

............

1562

-16

111

1531

vii

................................................

1-16

1-17
1-19
1-21
1-21

..............

.................

1-23
1-25

1-25
1-27

112

Powering Up the System

1-30

1.12.1

Power Controller .. ...... ..

... ..

.. ... ... .. ....

1.12.2

Mass Storage Drawer

1-30

CPU Drawer/System ..........................

1-31

1-30

1.123
1.13

Acceptance Testing for the Mass Storage Upgrade

1-31

1.14

Modifying ULTRIX to Utilize the Added Devices

1-33

........

Drawer Configuration/Setting SCSI IDs
2.1

Mass ~torage Drawer Configuration

.................

211
Altering the Factory-Set Configuration .........
...
2.1.1.1
Single Bus Configuration .. ... ...............
2112
Split Bus Configuration .. ...................
2.2
SCSIIDs . ... ..
2.2.1
Default SCSI Device IDs . ......................
222
Setting SCSIIDs . ...... ... ... ... ... ... ... ...
2221
SCSI Jumpers and Switches .. ..............

Figures
1-1

Slots and Suggested Location of Drawers

.. ........

1-2

CPU Drawer Front Panel . . .. ...................

1-3

Power Controller .. ........
... ... ... .. .......

1-4

Removing Filler Panel(s) . . .............

1-5

Assembling Mass Storage Drawer Slides . . . ... ... ..

1-6

Installing Mass Storage Drawer Siides . ...........

1-7

Opening the Version 1 Mass Storage Compartment
. . .

1-8

Removing a Drive Bracket from the Version 1 Mass

.......

Storage Drawer ... ...........................
1-9

Opening the Version 2 Mass Storage Compartment. . .

1-10

Removing a Drive Bracket from the Version 2 Mass

Storage Drawer ... ..... .. ...

... ... ... ... ....

1-11

Stabilizing the Enclosure . . . ....................

1-12

Installing the Version 1 Mass Storage Drawer..

... ..

1-13

Installing the Version 2 Mass Storage Drawer..

... ..

1-14

Pushing In Mass Storage Drawer

1-15

Version 1 Mass Storage Drawer Rear Panel.

1-16

Version 2 Mass Storage Drawer Rear Panel. ... ... ..

1-17

CPU Drawer Rear Panel ... ....................

1-18

Mass Storage Drawer Version 1 Front Panel ... ... ..

. ...............

... ... ..

2-1
2-2
2-2
2-2

2-6

2-7
-7
2-8

1-19

Mass Storage Drawer Version 2 Front Panel . . . ...
.

1-31

2-1

Version 1 Single Bus Configuration .. ........ .....

2-3

Version 1 Split Bus Configuration ... ......
.. .....

2-4

2-3

Version 2 Single Bus Configuration .. ..........
...

2-5

2-4

Version 2 Split Bus Configuration ... ........
...
.

2-6

1-1

Mass Storage Drawer Versions

..................

1-5

1-2

Drawer Locations on the Cabinet Rails ... .........

1-11

2-1

Configuration Option Choices/Advantages . ... ... ...

2-2

DECsystem 5900 SCSI Device ID Default Settings . . .

2-7

Tables

Page vi

a blank

paqge

Preface
Product Description
The DECsystem 5900 is a computer system designed for server applications,
including file servers, compute-servers, and network servers. It is a midrange
system that uses a modular approach, based on industry standard, 47.5 cm (19
in) rack mount components.

DECsystem 5900 servers use a high-performance single-board computer based
on the MIPS R3000A 40-MHz processor. The DECsystem 5900 comes in a
single-cabinet configuration that contains a power controller, one or two CPU
drawers, and up to four additional mass storage drawers.

Document Description
This manual describes the installation of a mass storage drawer (an “upgrade”)
into the DECsystem 5900. It will be packaged with an upgrade kit to provide
step by step instructions for Digital Services employees.
This manual is to be used in conjunction with the DECsystem 5900 Pocket
Service Guide, EK-D590A-PS.

Any service or upgrades needed inside the DECsystem 5900 cabinet must be
done by a Digital Service representative or an authorized self-maintenance
customer.

Audience
The DECsystem 5900 Mass Storage Drawer Installation Manual is for use only
by Digital Services Employees or self-maintenance customers who are receiving
a mass storage drawer upgrade for installation.

vii

Document Structure
The DECsystem 5900 Mass Storage Drawer Installation Manual contains three
chapters, as follows:
Chapter 1

Overview

This chapter provides an overview of the mass storage drawer
installation procedures.
Chapter 2

Mass Storage Drawer Installation

This chapter contains step by step procedures for the installation
and testing of the mass storage drawer.
Chapter 3

Drawer Configuration/Setting SCSI IDs
This chapter contains information needed to alter the factory
configuration of the drawer and to set the SCSI IDs of devices.
Since drawers will be configured at the factory, this should only be
necessary in exceptional circumstances.

Conventions Used in This Document
The DECsystem 5900 Mass Storage Drawer Installation Manuel uses the
following conventions:

Conveml&fi

indicates

boldface type

User input.

Caution

Information to prevent damage to equipment or software. Read

these carefully.

utalic type

Important information, vanables, and complete titles of manuals.

Note

General information about the current topic.

Press that key.

viii

rawer Installation
WARNING

Only qualified service personnel should remove or install a
mass storage drawer.
Extend the stabilizer bar to balance the system before pulling
out any drawer.

At least two people are required for installing a mass storage
drawer. A mass siorage drawer weighs 110 pounds when

fully populated, 63 pounds with no storage devices (includes
brackets). It is recommended that all siorage devices be
removed from a mass storage drawer before either lifting into
or out of the enclosure. See Section 1.6 and Section 1.9 for
details.

Caution

Static electricity can damage integrated circuits. Always use a
grounded wrist strap and a grounded work surface (29-26246) when
working with the internal parts of a computer system.
Procedures in this document assume that ULTRIX has been shut

down first; shut down ULTRIX in an orderly fashion before you install
a mass storage drawer (or any FRU) in the DECsystem 5900.

Turn off the system switch (Enable Power On Switch) and the main
circuit breaker before installing a mass storage drawer.

Mass Storage Drawer Installation

1-1

The general steps for installing a mass storage drawer are listed below. Each is
covered in detail in the referenced section of this chapter.
Because of the weight of a fully loaded mass storage drawer, the steps involve
removal of all devices before lifting it into place, and replacement of the devices
after installation.
1.

Unpack the upgrade shipment (Section 1.1)

Consult customer to determine location and configuration of the drawer
(Section 1.2)

Turn off the system (Section 1.3)

Remove filler panelis) (Section 1.4)

N oo

Install assembled slides in the cabinet (Section 1 5.2)

Extend the stabilizer bar to balance the system (Section 1.7)

Assemble mass storage drawer slides (Section 1.5.1)

Install the drawer in the cabinet (Section 1.8

10.

Replace devices in the drawer (Section 1.9

Remove devices from the drawer (Section 1.6)

. Reconnect all internal power and signal cables (Section 1.6
Set the device IDs if necessary (Section 2. 2)
13. Push in and secure the drawer (Section 1.1
14. Retract the stabilizer bar (Section 1.7)

15. Connect the external power cable and bus (Section 1.11)
16. Turn on the system (Section 1.12;

17. Reconfigure drawer(s) if necessary (Section 2.1)
18. Reset SCSI device IDs if necessary (Section 2.2)

19. Run acceptance tests (Section 1.13)

. Madify ULTRIX (Section 1.14)

1-2

Mass Storage Drawer Installation

1.1 Unpacking the Upgrade Shipment
To begin the installation, unpack the mass storage drawer and check to see that
it has arrived with slide assemblies. The external SCSI and power cables for all
drawers are present in the DECsystem 5900 when it is originally shipped from
the factory (whether or not drawer slots were filled at that time), so all external
cabling for the drawer should be already installed in the cabinet.
Section 1.1.1 lists the accessory kit contents for a mass storage drawer upgrade
shipment with no additional options or accessories.

1.1.1

Accessory Kit Contents

Mass storage drawer assembly
Drawer slides and accessories
SCSI cable
SCSI jumper
SCSI terminal
Filler panels for removable media slots
Tie-wraps

Screws
Product conversion label

DECsystem 5900 Mass Storage Drawer Installation Manual (this manual)

1.2 Consult Customer to Determine Configuration and
Location
1.2.1

Drawer Slot Location

Before proceeding with the mass storage drawer installation, consult the customer
or system manager to determine the drawer’s location in the DECsystem 5900
cabinet. The slots in the DECsystem 5900 are labeled consecutively, starting with
slot O on the bottom. The power controller is located in the rear of slot 0.
Original versions of the DECsystem 5900 are shipped with the CPU drawer in
slot 3, the first mass storage drawer in slot 4, and subsequent mass storage
drawers in slots 5, 1, and 6, in that order. It is recommended that this sequence
be followed for mass storage upgrades.

(See Figure 1-1).

Mass Storage Drawer Installation

1-3

Figure 1-1

Slots and Suggested Location of Drawers

MLO 008349

Slot 1 (may contain a mass storage drawer or other options; if empty, it will
be covered by a filler panel)
Slot 2 (left empty for dual CPU upgrade; covered by filler panel)
Slot 3 (original CPU drawer)

Slot 4 {original mass storage drawer)
Slot 5 (may contain a mass storage drawer or other options; if empty, it will
be covered by a filler panel)
Slot 6 (may contain a mass storage drawer or other options; if empty, it will
be covered by a filler panel)

Slot 0 (covered by a filler panel in front, contains power controller in rear)

1-4

Mass Storage Drawer Installation

1.2.2 Drawer Configuration
The mass storage upgrade for a DECsystem 5900 is a mass storage drawer
ordered by the customer as an add-on expansion/upgrade. All devices ordered in
the upgrade are installed in the drawer at the factory. The drawer should be fully
configured at the factory as well, and all SCSI IDs should be set.
Determine what configuration is to be used on the mass storage drawer you are

installing, and check to ensure that the drawer was configured that way at the
factory. If it is necessary to alter the configuration, see Section 2.1.

There are two versions of the mass storage drawer (referred to as version 1 and
version 2 in this manual). The following table will help to distinguish between
them.
Table 1-1

Mass Storage Drawer Versions

Distinguishing Features

Version 1

Version 2

Power switch on drawer front

Yes

Top cover

Two sections with screws

One-piece

Exposed fans on rear of drawer

Yes

Front details:

Figure 1-18

Figure 1--19

Rear details:

Figure 1-15

Figure 1-16

Each mass storage drawer may be configured in one of two ways:
1.

Single bus configuration (Section 2.1.1.1)

Split bus configuration (Section 2.1.1.2)

1.3 Powering Down the System
Caution
Prior to powering down the DECsystem 5900, ULTRIX must be shut

down in an orderly fashion by the customer/system manager.

To turn off the system:

Turn off the system power switch (Enable Power On Switch) on the front of
the CPU drawer. (See Figure 1-2.)

Mass Storage Drawer Installation

1-5

Turn off the circuit breaker on the power controller. (See Figure 1-3.)

Figure 1-2

CPU Drawer Front Panel

Ey/’

DLOO 0 (o

Mi 0007651

5/16 hex screws that secure the drawer to the shippirg restraints

CPU drawer power switch (should normally be left On)

System power switch (Enable Power On Switch)

LED power indicator

1-6

Mass Storage Drawer Installation

Flgure 1-3

Power Controller

MLO 008353

Remote power sequence cable (to CPU drawer)
Remote sequence connectors
Circuit breaker

Mass Storage Drawer Installation

1-7

1.4 Removing Filler Panel(s)
S'ots in the DECsystem 5300 enclosure front that contain no drawers will be
covered with a filler panel. Slot 0, which contains the power controller (accessed
through the rear of the enclosure), has a filler panel as well.
Filler panels are attached to the front cabinet rails by means of four hex screws,
two on each side. Remove the filler panels for slots being filled by inserting
a screwdniver through the access holes and removing the hex screws (see
Figure 1-4). Save the panel for future use by storing it in the accessory kit.

Figure 1-4

Removing Filler Panei(s)

MLO-008350

Filler panel

Hex screw

1-8

Mass Storage Drawer Installation

1.5 Mass Storage Drawer Slides
1.5.1

Assembling Mass Storage Drawer Slides

Use the following procedures to assemble mass storage drawer slides. (See
Figure 1-5.) To become familiar with the slides and their assembly, observe the
location of slides and angle brackets on an installed mass storage drawer before
beginning.
1.

Extend the new slides (to be installed) until the spring tabs latch them open.

Place the slides on a worksurface with the inside (drawer side) facing down.

Assemble the shde angle brackets, one to the rear and one to the front of the
bottom slide section. The screws attaching the slide to the front angle bracket

are inserted by positioning the slide so that the screws may be inserted one
by one through the access hole from the inside of the slide.
Note

Leave the angle brackets loosely assembled for ease of installation on the
cabinet rails

The small shelf on each angle bracket should engage the bottom of the slide,
and the four slots on each angle bracket should extend upward and align with
the extreme front and rear edges of the bottom slide section.
If slots do not extend upward while the shelf is engaged on the bottom of the
slide and align with the ends, you have the wrong angle brackets for that
location: check an installed mass storage drawer for reference.

Mass Storage Drawer Installation

1-9

Figure 1-5

Loc

Assembilng Mass Storage Drawer Slides

o;o-[f:

(o)

MLO-008405

Front angle bracket

Rear angle bracket

@ Screws
@

Access hole for inserting front angle bracket screws

1-10

Mass Storage Drawer Installation

1.5.2 instailing Assembled Slides in Cabinet
The DECsystem 5900 is shipped from the factory with U-nut clips in place on

the cabinet rails at the proper position for all mass storage drawer slides. If
these have heen removed, or were not installed, the placement of drawers may be
determined by counting the holes in the cabinet rails, beginning on the top and
counting down. The placement of drawers is as follows (slides occupy four holes

numbers on both the front and rear cabinet rails):
Table 1-2
Cabinet
Slot

Drawer Locations on the Cabinet Ralls
Typical Application

Hole Numbers (From the Top)

mass storage

5-8

mass storage

20-23

mass storage

35-38

CPU

50-53

CcpPU

65-68

mass storage

80-83

power controller

NA.

To install assembled slides, place the slides at the desired location for the mass
storage drawer and attach them squarely and firmly to the cabinet, using the four
screws and U-nuts for each angle bracket as depicted in Figure 1-6. Refer to an

installed mass storage drawer for details.

Caution
Once the angle brackets and slides are aligned perfectly to the cabinet

rails and set to the correct length, firmly tighten the screw

.olding the

shdes to the angle brackets.

Mass Storage Drawer Installation

1-11

Figure 1-6

Installing Mass Storage Drawer Slides

QE\No0o

Front

oOC0eo

MLO-008406

1-12

Mass Storage Drawer Installation

@ Rear angle bracket

@ Front angle bracket
@ Screws
@ U-nuts

1.6 Removing Devices from the Drawer
Due to the weight of a fully populated mass storage drawer, it is recommended
that the SCSI devices be removed from the drawer prior to lifting or installing it.
In order to do this, the cover must be removed.
To facilitate lifting the drawer into place, remove the devices using the following
steps.

Open the mass storage compartment cover. See Section 1.6.1.1 for mass
storage drawer version 1; Section 1.6.2.1 for version 2.

Note the position of each device within the drawer to be installed, and which
power and SCSI connector goes with which device. It may be helpful to mark
the cables and devices as you disconnect them.

Disconnect the power and internal SCSI cables from the devices; remove
all brackets containing storage devices from the drawer (do not remove the
devices from their brackets). See Section 1.6.1.2 for mass sitorage drawer
version 1; Section 1.6.2.2 for version 2,

Close the mass storage compartment cover.

1.6.1

Mass Storage Drawer Version 1

1.6.1.1

Opening/Closing Mass Storage Drawer Version 1

Mass storage drawers are opened differently depending upon the version; the

drawers may be identified by differing top covers as follows.
Version 1 mass storage drawers are opened by loosening quarter turn captive
screws on the top front cover of the drawer, and raising the cover. To close
the compartment, lower the cover and push down on the captive screws. See
Figure 1-7.

Mass Storage Drawer Installation

1-13

Figure 1-7 Opening the Version 1 Mass Storage Compartment

MLO D714

@ Quarter turn captive screws

@ Cover

1-14

Mass Storage Drawer Installation

1.6.1.2

Removing/Replacing Devices in Mass Storage Drawer Version 1

To remove a drive bracket (and device it contains) from the version 1 mass storage
drawer, disconnect the power and internal SCSI leads. You may find it helpful to
loosen the bracket and slide it up slightly to access the power and internal SCSI
leads before disconnecting them.
Completely loosen the captive set screw located at the top of the bracket, and
gently pull up on the bracket handle, sliding the bracket and the device it

contains straight up. If it sticks, carefully use a screwdriver to pry up on the

bracket without touching the device. See Figure 1-8.
To replace or install a drive bracket containing a device in the mass storage
drawer, reverse the above procedures.
Figure 1-8 depicts the removal of a drive bracket and device from one position in

the drawer; others may be oriented a different way, but are removed in essentially
the same manner.

tasc Storage Drawer Instailatior

1-1%

Figure 1-8

Rernoving a Drive Bracket from the Version 1 Mass Storage Drawer

MLO 007793

1.6.2 Mass Storage Drawer Version 2
1.5.2.1

Openi~y/Closing Mass Storage Drawer Version 2

Version 2 mass storage drawers are opened by pulling up on an indented handle
and removing the entire cover (there are no screws). To close the compartment,

replace the cover and push down firmly to ensure that it seats into the flashing.
See Figure i-9.

1-16

Mass Storage Drawer Installation

Figure 1-9 Opening the Version 2 Mass Storage Compartment

MLO-008373

Cover

1.6.2.2 Removing/Replacing Devices in Mass Storage Drawer Version 2

To remove a drive bracket (and the device it holds) from a version 2 mass storage

drawer, disconnect the power and internal SCSI leads, then loosen the two captive
screws on the bracket, and slide the bracket and device out. See Figure 1-10.
Note the orientation of the connectors to the bracket before removal so that you
can mount the replacement in the same manner.

To replace or install a drive bracket containing a device in the mass storage
drawer, reverse the above procedures.

Figure 1-10 depicts the removal of a drive bracket and device from one position in

the drawer; others may be oriented a different way, but are removed in essentially
the same manner.

Mass Storage Drawer Installation 1-17

Flgure 1-10 Removing a Drive Bracket from the Version 2 Mass Storage
Drawer

MLO-008376

1-18

Mass Storage Drawer Installation

1.7 Balancing the System
WARNING

Before installing or pulling out either the CPU or a mass storage
drawer, the stabilizer bar located at the bottom front of the
enclosure must be extended to balance the DECsystem 5900.

The system is balanced by extending the stabilizer bar located at the bottom
front, as depicted in Figure 1-11.

If the leveler is tightened down to the floor, raise it by hand so that the bar
may be moved.
e

Pull the stabilizer bar out until it stops.

Screw the leveler down firmly by hand.

To retract the bar, reverse the procedures.

Mass Storage Drawer Installation

1-19

Flgure 1-11

Stabliizing the Enclosure

MLO-007752

Stabilizer bar
Leveler foot

1-20

Mass Storage Drawer Installation

Installation of Drawer in the Cabinet
1.8.1

Installation of the Version 1 Drawer

Use the following procedures to install the version 1 mass storage drawer. To
install the slides the mass storage drawer rides on, see Section 1.5.
WARNING

Before installing or pulling out either the CPU or a mass storage
drawer, the stabilizer bar located at the bottom front of the
enclosure must be extended to balance the DECsystem 53800. See
Snn

ection 1.7.
@ au

WARNING

At least two people are required to remove or replace a drawer in
the DECsystem 5800.

Pull out the drawer shides from the cabinet until the slides lock ard the
spring tabs are out; you will be resting the entire drawer on these open shides,
so be sure they are firmly locked in place.
With your partner on one side of the drawer and vou on the other, lift it up
and place the “lip” on the side of the drawer on top of the slides; tilt the back

down very slightly and move the drawer back into the “notch” (now locked in
place near the front of the enclosure on the top of the shde).
3.

Both of you should push down on the drawer release tab (located on the side

of the drawer on the top front corner) on your respective sides while gently

maneuvering the tab into its corresponding hole in the slide.
You will hear/feel a “click” when each release tab engages.
See Figure 1-12.

Mass Storage Drawer Installation

1-21

MLO-0 8415

tab release DSrlaiwdeesr )D

InstalationDrawerStorageMas 1-2

1.8.2 Installation of the Version 2 Drawer
Use the following procedures to install the version 2 mass storage drawer. To
install the slides the mass storage drawer rides on, see Section 1.5.
WARNING

Before installing or pulling out either the CPU or a mass storage

drawer, the stabilizer bar located at the bottom front of the
enclosure must be extended to balance the DECsystem 5300. See
Section 1.7.

WARNING
At least two people are required to remove or replace a drawer in
the DECsystem 5800,

Pull out the drawer slides from the cabinet until they catch in the partially
extended position.

Reach under the front of the middle slide and trip the catch upward so that
the slides may be fully extended.
While holding the catch up, extend the slides until they lock and the spring

tabs are out: you will be resting the entire drawer on these open slides, so be
sure they are firmly locked in place.
With your partner on one side of the drawer and you on the other, lift it up

and place the “lip” on the side of the drawer on top of the slides. Line the
holes in the side of the drawer up with those on the inner part of the slide.
5.

Attach the foremost hole on the extended portion of the slide to the front
drawer hole with a hex screw.
Press in on the shde tab and close the drawer slowly until the rear slide hole

1s exposed (it should be lined up with the rear drawer hole at this point).
7.

Attach the rear slide hole to the drawer with a hex screw.

See Figure 1-13.

Mass Storage Drawer Installation

1-23

Figure 1-13

Installing the Version 2 Ma ss Storage Drawer
TM~

r\\

MLO-0084 16

Slide catch
Hex screws

1-24

Mass Storage Drawer Installation

@ Spring tab

WARNING

A stable step ladder or stool is required to service the upper
drawers in a DECsystem 5%00.

Open the mass storage compartment cover (see Section 1.6).

Replace all brackets and devices in the exact location noted in Section 1.6.

Reconnect the internal power and SCSI cables as they were (see Section 1.6).

Close the mass storage compartment cover.

1.10 Pushirg In and Securing the Drawer
‘fo push in the mass storage drawer, follow the procedures below. See
Figure 1-14.
1.

Simultaneously push in and hold both the spring tabs on the slides (one on
the outside of each slide).
Push in on the front of the drawer until it is flush with the front drawer
bracket (which are attached to the cabinet rails).

There is no need for hex screws on the front of the drawer; the six holes are
for use in the future to secure the drawer to shipping restraint brackets if the
system is to be shipped.

Mass Storage Drawer Installation

1-25

IDrawerStoransgtealMaatisonDrinawPeursShtionragge1M-a1s4Fl1g-u2r6e
Stprainbg

1.11 Connecting Power and SCSI Cables
After securing the drawer in the cabinet, connect the external power and SCSI
cables to the receptacles. See Figure 1-15 for the version 1 mass storage drawer,
Figure 1-16 for version 2, and Figure 1-17 for the CPU drawer.
I.

Plug the power cord into the back of the drawer; the correct cord was put in
place by the factory, and should be tie-wrapped and hanging next to the back

of the drawer; the other end is plugged into the power controller.
2.

Connect one end of the SCSI cable to the mass storage drawer.

If you are installing a new SCSI cable, tie-wrap it with the others along the
cabinet rail and route it along the CPU drawer cable arm.
Connect the other end of the SCSI cable to one of the SCSI ports on the back

of the CPU drawer; either the built-in SCSI port or a PMAZ SCSI adapter.

(The appropriate port will vary according the the particular configuration
of the DECsystem 5900; if in doubt, check with the customer or system
manager.)

Figure 1-15

Version 1 Mass Storage Drawer Rear Panel

O B

M1.O-007655

Power switch {should normaily be left “On”-see Section 1.3)
Power cable that connects to main power controller
SCSI bus(ses) that connect to the CPU drawer and/or SCSI terminator

Mass Storage Drawer Installation

1~27

Air inlet

See Section 2.1 for information on drawer configuration and Section 2.2 for
setting SCSI IDs.

Figure 1-16 Verslon 2 Mass Storage Drawer Rear Panel

MLO 008413

Power switch (should normally be left On)

Power cable that connects to main power controller

SCSI bustses) that connect to the CPU drawer and/or SCSI terminator
Power supply

Fans

1-28

WMass Storage Drawer Installation

Figure 1-17 CPU Drawer Rear Panel

nluu L

B St tuattset
St i
we ':{‘:fi:!,:i:i:‘::i::.:,:‘:_'T:, 4

MLO 007741

Not used

TURBOchannel Extender Module slots

TURBOchannel Extender 1/Q) (connected to @
Ac power receptacle

Remote power sequence connector
System module SCSI port

TURBOchannel Extender Adapter module (in option slot 0, connected to @)
Standard Ethernet
Diagnostic LEDs
Halt switch

System console port

TURBOchannel option slot |
Communications port

TURBOchannel option slot 2
Not used

Mass Storage Drawer Instaliaton

1-28

1.12

the System

1.12.1

Power Controller

Turn on the circuit breaker on the pewer controller (located in the rear of the
cabinet, on the bottom, see Figure 1-3).

1.12.2

Mass Storage Drawer

Switch the mass storage drawer power switch on the rear of the mass storage
drawer “On”, if it has been switched off. (See Figure 1-15 or Figure 1-16.). Mass
storage drawer version 1 also has a power switch on the front of the drawer
which must be switched “On” (see Figure 1-18). Version 2 (Figure 1-19) does not

have a power switch on the front but uses and LED to indicate “On”.

Flgure 1-1u

Mass Storage Drawer Version 1 Front Panel

1.0 007650

Air inlet

Power switch-may have green LED to indicate “Power on”

Optional full-height removable media device (TLZ04 shiown)
Optional half-height removable media devices (TZ30s shown)

930

Mass Storage Drawer Installation

Flgure 1-19 Mass Storage Drawer Vers!on 2 Front Panel

umuw )}[‘,HH \]3 |
S

Lolidl

Air nlet

Optional full-height removable media device (TLZ04 shown)

Optional half-height removable media devices (RRD42s shown)
LED

1.12.3 CPU Drawer/System
There are two power switches on both the front of the CPU drawer, an Enable
Power On Switch (system power switch) for the entire DECsystem 5900, and a
CPU drawer power switch (the lower of the two switches) for the CPU drawer
only. Make sure both are switched “On”. Turn on the upper system power switch
first.

See Figure 1-2.

1.13 Acceptance Testing for the Mass Storage Upgrade
There are some major steps that you should take to verify that the system can
‘see’ all the devices connected to it, that is, there are no configuration or cabling
problems, and that any new devices added to the system are functionally in good
operating condition.
Note

The following is only a list of steps to take for acceptance testing;
for more detailed information consult the DECsystem 5900 Service

Mass Storage Drawer Instaliaton

1-31

Guide, EK-D590A-PS, and the DECsystem 5900 Installation Guide,

EK-D59%0A-IN.

Turn on the system and observe the Power-Up-Self-Test (POST). No errors

should occur on the console. The Kbd and Pntr messages are not errors.
This will test internal system components, such as CPU, caches, memory and
TURBOchannel adapters only.
2.

Use the enfg utility to make sure that you can see all the devices on the
system. Using the cnfg x command (where x = the TURBOchannel slot),

make sure that the system can recognize all the devices on the SCSI busses
and that there are no SCSI ID conflicts.
If you cannot see all the devices, check the ID settings of the devices on
that bus and make sure they are properly connected to the bus. Remember
that each SCSI bus can have only one device with a 0, 1, 2,3, 4, 5, or 6 ID
connected.

Run the sesi/cntl (SCSI controller), scsi/sdiag (send diagnostic) and the
scsi/target tests (test SCSI devices) on the SCSI controller(s) and newly added
SCSI devices. The following are examples of the console commands to invoke
these tests:
t 3/scsi/entl

t 3'scsi/sdiag scsi_id [d] [u] [s]
t 3/scsi/target scsi_id [w] /loops]
Caution

The [w] parameter on the scsi/target test may cause data loss; use it only
on disk devices which have no data on them, or use a scratch tape on tape
devices.

Note

scsi id = SCSI 1# # of device you wish to test.
id] [u} = optional parameters for specific drive(s), refer to service
guide for drive.

[s] = suppress error message display

1-32

Mass Storage Drawer Installation

[loops) = Specify the optional | parameter to have the test repeat up
to 9 times. For example, t 1/scsi/target 3 1 4 will run the scsi target
test on device three on TURBOchannel slot one for four passes.

1.14

Modifying ULTRIX to Utilize the Added Devices

These steps will vary with the scope of the changes to the system configuration
that have been made during the mass storage drawer upgrade. Depending

on the site, you and/or the customer/system manager should consult ULTRIX
documentation on rebuilding the kernal and file specification for more details on
adding devices.

Mass Storage Drawer Installation

1-33

2
r Configuration/Setting SCSI |IDs
WARNING

Before installing or pulling out either the CPU or a mass storage
drawer, the stabilizer bar located at the bottom front of the
enclosure must be extended to balance the DECsystem 5300. See
Section 1.7.

2.1 Mass Storage Drawer Configuration
Note

The information contained in this section is needed only if the factory

configuration of the mass storage drawer must be altered. A synopsis of
this information is on the label located on the mass storage drawer cover.

A mass storage drawer has the capability to split SCSI devices between two
SCSI controllers. Devices in the mass storage drawer must be configured and
connected before turning on the system.
All mass storage drawers in the DECsystem 5900 are ordered in a specific
factory-installed cenfiguration as specified by the custoiner/system manager (this

includes mass storage upgrades ordered at a later date).
There are two cabling configuration choices available:
1.

single bus configuration (Section 2.1.1.1)

split bus configuration (Section 2.1.1.2)

Drawer Configuration/Setting SCSI IDs

2-1

2.1.1

Altering the Factory-Set Configuration

The customer/system manager may wish to alter the configuration of a mass
storage drawer; the options and tradeoffs are listed below. Configurations are
depicted in Figure 2-1 and Figure 2-2 (version 1), and Figure 2-3 Figure 24
(version 2).
Table 2-1

Configuration Option Cholces/Advantages

Contiguration Option

Advantages

Single bus

Maximizes devices per SCSI controller.

Sphit bus

Improves processing speed and efficiency for increased
I/0 loads.

2.1.1.1

Single Bus Configuration

For a single bus configuration, you must mnstall a jumper between the internal
SCSI cables in the mass storage drawer. The jumper connects the two busses
in a mass storage drawer, the resulting single bus configuration is terminated
on the rear of the drawer on the connection next to the SCSI signal input. See
Figure 2-1 and Figure 2-3.

2.1.1.2 Split Bus Configuration
The split bus configuration uses both SCSI signal cables without a jumper. In this
configuration both SCSI busses must be terminated at the end of each internal
SCSI cable. See Figure 2-2 and Figure 2-4.

2-2

Drawer Contiguration/Setting SCSI iDs

cTabelremJiuSnimagptneoarrl

ConfigurationBusSingle1Verslon2-1Flgure

2-3 IDsSCS!Configuration/SetingDrawer

MLO-008372

ConfigurationBusSplit1Verslon2-2Flgure

IDsSCSIConfiguration/Setcctaaibbnllgee[rSSaiiwggennraall2-4
Terminator Terminator

MLO-008I83

2-5iIDsSCSIConfiguration/SetingDrawer
Terminator Sciagbnlael

KLO-008384

Note

Terminator

ConfigurationBusSplit2Verslon2-4Flgure

Itshetefoanctiosriyntfhoermiaftoinolnytnheisdocefodvseyirsn.osdperscaitswioeAnrDtashtlioSserCaiSegn!de.cComobnnaeftsiamgiunrtsaehtdeioIinoD/nSfseoltrcSoamiCcbnaSlgtIeieDodrSnaeilwvgaTeinbhrcaell2-6
2.2

Sciagbnlael

2.2.1

Default SCSI Device

IDs

SCSI default settings for the DECsystem 5900 are histed in Table 2-2. The
settings listed give eptimal performance on most systems.
Table 2-2

DECsystem 59 00 SCSI Device 1D Default Settings

CPU S8CSi adapter

First removable device

Boot device or first device

Remaining devices, in order

1,2,3,4,6

Remaining removable devices

6,4,3,2,1

Note

No devices should ever use SCSI ID 7, as this is reserved for the CPU or
PMAZ SCSI controller.

2.2.2 Setting SCSI IDs
Digital sets each SCSI device to a default SCSI ID setting before the equipment

leaves the factory. These default settings should be changed only when there is a
conflict with other SCSI IDs on the same SCSI bus.
When adding a SCSI device to the DECsystem 5900 (or reconfiguring a mass
storage drawer) it may be necessary to change the ID of effected SCSI devices.
The Digital Services engineer is responsible for changing the SCSI ID settings as

part of the reconfiguration process.
Discuss the SCSI device ID options with the customer/system manager, and note

the original configuiration before altering the original device IDs.
When each SCSI device is added or reconfigured, a label should be placed on the
dewvice or bracket indicating the SCSI ID. This will help diagnose ID conflicts.

After changing SCSI IDs, appropriate tests should be run (see Section 1.13).

Orawer Configuration/Setting SCSI IDs

2-7

2.2.2.1

SCS: Jumpers and Switches

Varying means are employed (sets of switches, jumpers, incremental switch,
programmed via front panel, and so on) to set the SCSI ID and parity, depending
on the particular device. For the method employed, and the location of switches
/jumpers on a particular device, see the appropriate device “User’s Manual” and

the label located on the underside of the mass storage drawer cover.
On devices with jumpers, the SCSI ID is set by inserting (“In”) or removing

(“Out”) any of three jumpers in a specific combination. On devices with sets of
switches, the SCSI 1D is set by moving any or all of the switches to “On” or “Off".
Incremental switches show a number which increments up or down when the
switch is pushed.

Caution
To change SCSI ID switches, use a pen or small pointed object to move
the jumper; do not use a pencil point. Graphite particles can damage the
device.

2-8

Drawer Configuration/Setting SCSI IDs