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Document:	StorageWorks 16-Bit Pedestal (BA356-Series) User's Guide
Order Number:	EK-356KB-UG
Revision:	C01
Pages:	38
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DIGITAL StorageWorks
16-Bit Pedestal (BA356-Series)
User's Guide
Part Number: EK-356KB-UG. C01

March 1997
This guide describes the procedures to install, and operate a deskside expansion
pedestal (BA356−K series).

Digital Equipment Corporation
Maynard, Massachusetts

March 1997
While DIGITAL believes the information included in this publication is correct as of the date of publication, it is
subject to change without notice.
Digital Equipment Corporation makes no representations that the interconnection of its products in the manner
described in this document will not infringe existing or future patent rights, nor do the descriptions contained in this
document imply the granting of licenses to make, use, or sell equipment or software in accordance with the description.
FCC ID: AO9–BA356

___________________NOTE ________________________
This equipment has been tested and found to comply with the limits for a Class B digital device,
pursuant to Part 15 of the FCC rules. These limits are designed to provide reasonable protection against
harmful interference in a residential installation.
Any changes or modifications made to this equipment may void the users authority to operate this
equipment.
This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in
accordance with the instructions, may cause harmful interference to radio communications. However,
there is no guarantee that interference will not occur in a particular installation. If this equipment does
cause harmful interference to radio or television reception, which can be determined by turning the
equipment off and on, the user is encouraged to try to correct the interference by one or more of the
following measures:
•

Reorient or relocate the receiving antenna.

•

Increase the separation between the equipment and receiver.

•

Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.

•

Consult the dealer or an experienced radio/TV technician for help.

____________________________________________________________________
© Digital Equipment Corporation 1995, 1997
All Rights Reserved.
Printed in the United States of America.
The following are trademarks of Digital Equipment Corporation: CI, DEC, DIGITAL, Digital, DSA, DSSI, HSC, RZ,
StorageWorks, VAX, and the DIGITAL logo.
The following are third-party trademarks:
Adobe and PostScript are registered trademarks of Adobe Systems, Incorporated.
Helvetica and Times are registered trademarks of Linotype Co.
Hewlett-Packard is a registered trademark of Hewlett-Packard Company
Sun Microsystems is a registered trademark of Sun Microsystems, Inc.
Microsoft and MS-DOS are registered trademarks and Windows is a trademark of Microsoft Corporation.
UNIX is a registered trademark of American Telegraph and Telephone Company.
All other trademarks and registered trademarks are the property of their respective holders.
Word for Windows 6.0 is a trademark of Microsoft Corporation.
This document was produced using Word for Windows 6.0

Contents
Preface
Intended Audience............................................................................................................... v
Structure .............................................................................................................................. v
Documentation Conventions ................................................................................................ v
Related Documents............................................................................................................. vi

1 Introducing the StorageWorks Pedestal
Product Description ......................................................................................................... 1–2
Features ........................................................................................................................... 1–2
Product Specifications ..................................................................................................... 1–4
StorageWorks Building Blocks (SBBs)............................................................................ 1–5
Power .............................................................................................................................. 1–6
Cooling............................................................................................................................ 1–8

2 Installing a Pedestal
Planning the Installation .................................................................................................. 2–1
Selecting the Installation Area ......................................................................................... 2–2
SCSI Cables..................................................................................................................... 2–3
Installing the SCSI Cables ............................................................................................... 2–3
Installing the Power Cord ................................................................................................ 2–5
Installing SBBs................................................................................................................ 2–6
Checking Pedestal Operation ........................................................................................... 2–6
Connecting the Controller................................................................................................ 2–7
Moving the Pedestal ........................................................................................................ 2–7

3 Operating a Pedestal
Operational Status............................................................................................................ 3–1
Replacing SBBs and Power Supplies ............................................................................... 3–2
Replacing a Blower Assembly ......................................................................................... 3–5
Disassembling a Pedestal ................................................................................................. 3–6

Glossary

iii

Figures
Figure 1–1 Typical Deskside Expansion Pedestal............................................................ 1–1
Figure 1–2 Typical 16-Bit SBB Shelf.............................................................................. 1–2
Figure 1–3 Pedestal Dimensions ..................................................................................... 1–4
Figure 1–4 Typical 3.5-Inch SBB.................................................................................... 1–5
Figure 1–5 Typical 5.25-Inch SBB.................................................................................. 1–5
Figure 1–6 Typical 3.5-Inch SBB.................................................................................... 1–6
Figure 1–7 Power Distribution Unit—Rear View ............................................................ 1–6
Figure 1–8 Typical 3.5-Inch SBB.................................................................................... 1–7
Figure 1–9 Power Distribution Unit—Rear View ............................................................ 1–7
Figure 1–10 Blower Assemblies Locations ..................................................................... 1–8
Figure 2–1 Typical Device Certification Label ............................................................... 2–1
Figure 2–2 Pedestal Installation Dimensions ................................................................... 2–2
Figure 2–3 SCSI Cables—Primary Path .......................................................................... 2–3
Figure 2–4 SCSI Cables—Alternate Path ........................................................................ 2–4
Figure 2–5 16-Bit Expander I/O Module......................................................................... 2–4
Figure 2–6 16-Bit SBB Shelf I/O Module ....................................................................... 2–4
Figure 2–7 8-Bit SBB Shelf I/O Module ......................................................................... 2–4
Figure 2–8 Power Cord Routing...................................................................................... 2–5

Tables
Figure 1–1 Typical Deskside Expansion Pedestal............................................................ 1–1
Figure 1–2 Typical 16-Bit SBB Shelf.............................................................................. 1–2
Figure 1–3 Pedestal Dimensions ..................................................................................... 1–4
Figure 1–4 Typical 3.5-Inch SBB.................................................................................... 1–5
Figure 1–5 Typical 5.25-Inch SBB.................................................................................. 1–5
Figure 1–6 Typical 3.5-Inch SBB.................................................................................... 1–6
Figure 1–7 Power Distribution Unit—Rear View ............................................................ 1–6
Figure 1–8 Typical 3.5-Inch SBB.................................................................................... 1–7
Figure 1–9 Power Distribution Unit—Rear View ............................................................ 1–7
Figure 1–10 Blower Assemblies Locations ..................................................................... 1–8
Figure 2–1 Typical Device Certification Label ............................................................... 2–1
Figure 2–2 Pedestal Installation Dimensions ................................................................... 2–2
Figure 2–3 SCSI Cables—Primary Path .......................................................................... 2–3
Figure 2–4 SCSI Cables—Alternate Path ........................................................................ 2–4
Figure 2–5 16-Bit Expander I/O Module......................................................................... 2–4
Figure 2–6 16-Bit SBB Shelf I/O Module ....................................................................... 2–4
Figure 2–7 8-Bit SBB Shelf I/O Module ......................................................................... 2–4
Figure 2–8 Power Cord Routing...................................................................................... 2–5

Preface
The DIGITAL StorageWorks 16-Bit Pedestals (BA356–K Series) User’s Guide describes the BA356
pedestals and compatible StorageWorks components. This guide discusses some of the basic
pedestal applications. The information in this document supplements, but does not replace, the
information in the SBB shelf user’s guides.

Intended Audience
This document is for use by personnel responsible for designing, configuring, assembling, installing,
and operating pedestals.

Structure
The organization of this publication is as follows:
Chapter 1

An introduction to the pedestals that includes product description,
features, shelves, building blocks, power, blower assemblies, and
product specifications.

Chapter 2

Detailed procedures for installing a pedestal including planning the
installation, selecting and routing SCSI cables, pedestal power and
cooling, and testing the pedestal.

Chapter 3

Procedures for determining pedestal and SBB operational status and
basic replacement procedures

Documentation Conventions
The documentation conventions used in this publication are as follows:
boldface type

Boldface type indicates the first instance of terms being defined in the te
both.

italic type

Italic type indicates emphasis and complete guide titles.
Italic type in the glossary indicates a cross-reference.

Related Documents
The following is a list of other StorageWorks user documents that are applicable to pedestals.
Document Title

Order Number

16-Bit SBB User’s Guide

EK-SBB16-UG

StorageWorks Solutions BA356 16-Bit Shelf and SBB User’s Guide

EK–BA356–UG

StorageWorks Solutions SBB Shelf I/O Module User’s Guide

EK-SBBIO-UG

StorageWorks Solutions SBB User’s Guide (8-Bit)

EK-SBB35-UG

1
Introducing the StorageWorks Pedestal
This chapter is a general description of the StorageWorks™ BA356-series 16-bit pedestal. This
description includes features, components, StorageWorks building blocks (SBBs), power, cooling,
and specifications. Subsequent chapters describe installation and operation.
Figure 1–1 Typical Deskside Expansion Pedestal

CXO-4371A-MC

™

Trademark of Digital Equipment Corporation

DIGITAL StorageWorks 16-Bit Pedestals

1–1

Introducing the StorageWorks Pedestal

Product Description
The pedestal (see Figure 1–1) encloses a StorageWorks building block shelf (SBB shelf). This
low-cost, mass storage solution enables you to design an extremely flexible storage array to meet
both your current and future needs. The basic component of the deskside expansion pedestal is a 16bit, single ended SCSI bus shelf (see Figure 1–2).
Figure 1–2 Typical 16-Bit SBB Shelf

CXO-4319A-MC

This shelf can accommodate either 3.5-inch or 5.25-inch StorageWorks building blocks (SBBs) in
various combinations to create a storage array specifically suited to your needs. You have the option
of using any StorageWorks compatible disk drive, tape drive, CD-ROM, or other SBB storage
device. However, the SCSI bus controller capabilities and the pedestal physical limitations can
restrict the number of SBBs, the SBB types, and the combination of SBB types you install in a
pedestal or on a single SCSI bus.
The shelf capability determines the following:
•

Possible SCSI bus configurations

•

Maximum SCSI cable lengths

•

Device address range

The 16-bit shelf has both CE-Mark and FCC Class B certification. The SBB FCC certification
therefore determines the pedestal location. You can use an SBB with FCC Class B certification in a
home environment. When you install Class A certified SBBs in pedestal you can only use the
pedestal in a commercial environment.
__________________ Caution _______________________
There is no provision for installing a controller shelf in a pedestal. DIGITAL
neither supports nor recommends such a configuration.
____________________________________________________________________

Features
All StorageWorks pedestals have the following features:
•

Locking front and rear bezels that prevent unauthorized removal of SBBs.

•

Flexibility to design a storage array subsystem that meets your specific needs.

•

An ac distribution unit with switch-controlled ac outputs.

•

You can connect, or “daisy-chain,” the ac power from one pedestal to another.

The shelf and SBB features include the following:

1–2 DIGITAL StorageWorks 16-Bit Pedestals

Introducing the StorageWorks Pedestal

•

You can mix 3.5-inch and 5.25-inch SBBs in a single pedestal.

•

You can install a second shelf power supply, the redundant power option.

•

Redundant blower assemblies, either one of which can cool the pedestal should the other blower
fail.

•

You can “daisy-chain” the ac power to multiple pedestals.

•

The power supply SBBs provide a visual display of shelf status (power, cooling).

•

The device SBB LEDs provide a visual display of storage device status (operation, fault).

Table 1–1 is a synopsis of the basic features of the 16-bit pedestal.
Table 1–1 16-But SBB Shelf Features
Feature
SCSI Buses Supported

Description
8-Bit Single Ended
16-Bit, Single Ended

Device Address

0-15

SCSI Cable I/O Module
Connectors

Two 16-bit shelf expander I/O module 68-pin, high-density
(VHDCI)
Two 16-bit shelf I/O module 68-pin, high-density (SCSI “P”)
Two 8-bit shelf I/O module 50-pin, high-density (SCSI “A”)

SCSI Bus Configurations

Single Bus
Split Bus

SCSI Bus Configuration
Control

Terminator Board (BA35X-ME)
Jumper Board (BA35X-MF)
16-Bit SBB Shelf Expander I/O Module, Single Ended
(BA35X-FA, BA35X-FB)
16-Bit SBB Shelf I/O Module (BA35X-MH)
8-Bit SBB Shelf 1/O Module (BA35X-MG)

Supported Storage Devices

3.5-Inch SBB
5.25-Inch SBB

Supported Shelf Power
Supplies

ac input

Blower Assemblies

Dual Speed (BA35X-MD)

__________________ Note__________________________
The pedestal does not support either dc power supplies or 5.25-inch tape drives
with a loader.
____________________________________________________________________

DIGITAL StorageWorks 16-Bit Pedestals

1–3

Introducing the StorageWorks Pedestal

Product Specifications
Figure 1–3 and Table 1–2 show the basic pedestal specifications.
Figure 1–3 Pedestal Dimensions
0.8 m
(2.5 ft)

1m
(3.3 ft)

1.9 m
(6.3 ft)
CXO-4406A-MC

Table 1–2 Typical Pedestal Specifications
Dimension

Metric

English

Dimensions (Without Service Areas)
Height

0.6 m

2 ft

Width

0.3 m

1 ft

Depth

0.4 m

1.3 ft

Weight (No SBBs)

17 kg

37 lb

Door Clearance (Front and Rear)

0.3 m

1 ft

Ventilation (Front and Rear)

0.3 m

1 ft

Dimensions (Including Service Areas)
Height

3.3 ft

Width

0.8 m

2.5 ft

Depth

1.9 m

6.3 ft

Power—150 W Power Supply
Nominal Output Voltages
Disk spinup interval

1–4 DIGITAL StorageWorks 16-Bit Pedestals

+5 V dc @ 8.4 A
+12 V dc @ 9.0 A
4 second (minimum)

Introducing the StorageWorks Pedestal

StorageWorks Building Blocks (SBBs)
The following factors determine the compatible storage devices:
•

The individual SBBs that the SCSI controller supports (see the controller release notes).

•

The combinations of SBBs on the same SCSI bus that the SCSI controller supports (see the
controller release notes).

•

You cannot install tape storage devices with a loader (for example, the TLZ7L–VA cartridge
tape drive) in a pedestal.
Figure 1–5 Typical 5.25-Inch SBB

Figure 1–4 Typical 3.5-Inch SBB

CXO-4379A-MC

CXO-4380A-MC

DIGITAL StorageWorks 16-Bit Pedestals

1–5

Introducing the StorageWorks Pedestal

Power
The power distribution unit distributes ac power to shelf SBB power supplies and other pedestals.
The ac distribution unit has the following features:
•

Universal ac input (100–240 V ac, 50–60 Hz)

•

Switch controlled ac outputs
 Two 2.0 amp shelf power cords (see Figure 1–8)
 One 4.0 amp power cord for second pedestal (see Figure 1–9)

•

User-selected, country-specific power cords (see Table 1–3)
Figure 1–7 Power Distribution Unit—Rear View

Figure 1–6 Typical 3.5-Inch SBB

AC INPUT
RECEPTACLE

SECOND
UNIT POWER
CORD
CXO-4418A-MC

POWER
SWITCH

SHELF
POWER
CORDS
CXO-4417A-MC

___________________ Note _________________________
For proper operation of a pedestal, you must have either one of the recommended
country-specific power cords listed in Table 1–3 or an equivalent.
____________________________________________________________________

1–6 DIGITAL StorageWorks 16-Bit Pedestals

Introducing the StorageWorks Pedestal

Table 1–3 Recommended Country-Specific AC Power Cords
V ac

Connector Type

Part No.

Australia

Country

250

IEC 320 C13, C14

AS3112-1981

Plug Type

2.5

8.2

BN19H-2E

Central Europe

250

IEC 320 C13, C14

CEE 7/7 (Schuko)

2.5

8.2

BN19C-2E

Denmark

250

IEC 320 C13, C14

Afsnit 107

2.5

8.2

BN19K-2E

India

250

IEC 320 C13, C14

BS 546

2.5

8.2

BN19S-2E

Ireland

250

IEC 320 C13, C14

BS 1363

2.5

8.2

BN19A-2E

Israel

250

IEC 320 C13, C14

SI 32

2.5

8.2

BN18L-2E

Italy

250

IEC 320 C13, C14

CEI 213-16/VII

2.5

8.2

BN19M-2E

Japan

125

IEC 320 C13, C14

NEMA 5-15

3.0

9.8

BN27S-03

New Zealand

250

IEC 320 C13, C14

AS3112-1981

2.5

8.2

BN19H-2E

South Africa

250

IEC 320 C13, C14

BS 546

2.5

8.2

BN19S-2E

Switzerland

250

IEC 320 C13, C14

SEV 1011

2.5

8.2

E0-BN19H-2E

United Kingdom

250

IEC 320 C13, C14

BS 1363

2.5

8.2

BN19A-2E

United States

125

IEC 320 C13, C14

NEMA 5-15

3.0

9.8

BN27S-03

Figure 1–9 Power Distribution Unit—Rear View

Figure 1–8 Typical 3.5-Inch SBB

AC INPUT
RECEPTACLE

SECOND
UNIT POWER
CORD
CXO-4418A-MC

POWER
SWITCH

SHELF
POWER
CORDS
CXO-4417A-MC

DIGITAL StorageWorks 16-Bit Pedestals

1–7

Introducing the StorageWorks Pedestal

Cooling
The two dual speed, 7200 RPM blower assemblies on the back of the SBB shelves cool the pedestal
by moving air from the front of the pedestal, through the SBBs and the shelf, and out the rear. The
air flow control baffles in the base and in the top prevents the exhaust air from circulating within the
pedestal. DIGITAL recommends you replace a defective blower immediately, even though one
blower provides enough air flow to keep the devices operating.
A safety screw and two “press-to-release” mounting tabs secure each blower assembly to the shelf.
Figure 1–10 Blower Assemblies Locations

BLOWER
ASSEMBLY

CXO-4414A-MC

1–8 DIGITAL StorageWorks 16-Bit Pedestals

2
Installing a Pedestal
This chapter describes the procedures for installing a pedestal. Subjects include planning the
installation; initial installation procedures; storage device security; replacing storage devices; testing
the pedestal; connecting the SCSI cables; and connecting the power cables.

Planning the Installation
Planning the installation involves the following processes:
•

Determining the approved installation environment (commercial or home)

•

Selecting an area that provides sufficient space

•

Considering the SCSI bus restrictions

The location of the pedestal depends upon the SBBs used. The pedestal and shelves are Class B
devices, and can be installed in a home environment. However, installing a Class A certified device,
such as an RRD45-VA CD-ROM restricts installation to a commercial or office environment. The
device certification label (see Figure 2–1) lists the device certification.
Figure 2–1 Typical Device Certification Label

CXO-5000A-PH

•

All SBBs meet FCC Class A standards for use in a commercial environment.

•

You can install FCC Class B SBBs in a home environment.

•

Use in a home environment requires that all SBBs be FCC Class B certified.

The user is responsible for installing the pedestal in the approved environment.

DIGITAL StorageWorks 16-Bit Pedestals 2–1

Installing a Pedestal

Selecting the Installation Area
As shown in Figure 2–2, the pedestal requires an area:
•

1.9 m (6.3 ft) deep

•

0.8 m (2.5 ft) wide

•

1 m (3.3 ft) high

Figure 2–2 Pedestal Installation Dimensions
0.8 m
(2.5 ft)

1m
(3.3 ft)

1.9 m
(6.3 ft)
CXO-4406A-MC

In addition to the space requirements, you should also consider the following factors:
•

The locations of SCSI controller or host.

•

The maximum bus length.

•

The length of the SCSI bus cable.

•

The routing of the SCSI bus cable.

•

The location of the ac power source

2–2 DIGITAL StorageWorks 16-Bit Pedestals

Installing a Pedestal

SCSI Cables
Selecting a SCSI cable requires you to:
•

Determine the maximum cable length based upon the:
 Bus type (single ended or differential)
 bus speed

•

Shelf connectors

Refer to the following publications for detailed information about the SCSI buses and cables.
•

StorageWorks Solutions BA356–SB 16-Bit Shelf and SBB User’s Guide

•

StorageWorks Solutions Shelf and SBB User’s Guide (8-bit shelves)

Once you have selected the cable you must determine the best path for the cable from the controller
to the pedestal. In some cases it may be necessary to relocate the pedestal.
__________________ Note__________________________
Remember that as much as 1 m (3 ft) of the SCSI cable can be within the
pedestal.
____________________________________________________________________

Installing the SCSI Cables
The SCSI cables connect to the SBB shelf I/O module connectors. You can install the cable either
through the rear of the pedestal (the primary path, see Figure 2–3) or through the side of the bezel
(the alternate path, see Figure 2–4). The cable path you use depends on the SCSI bus cable length.
The primary path is longer and requires you to insert the cables into the air flow baffle in the top.
Figure 2–3 SCSI Cables—Primary Path
JA1

JB1

To host
CXO4374A

DIGITAL StorageWorks 16-Bit Pedestals 2–3

Installing a Pedestal

The alternate path is approximately 1 m (3.3 ft) shorter. To use it, remove one of the bezel clips
from the top of the front bezel.
Figure 2–4 SCSI Cables—Alternate Path
0.3 m
(1 ft)

0.6 m
(2 ft)

.4 m
(1.3 ft)

CXO-4404A-MC

The SCSI cables attach to one the I/O shown in Figure 2–5, Figure 2–6, or
Figure 2–7.
Figure 2–6 16-Bit SBB Shelf I/O Module

Figure 2–5 16-Bit Expander I/O Module

1 2 3 4 5 6 7

Channel A
connector

Upper
mounting
tab

Channel B
connector

Lower
mounting
tab
CXO5710A

JA1
JB1

CXO-4415A-MC

2–4 DIGITAL StorageWorks 16-Bit Pedestals

Installing a Pedestal

Figure 2–7 8-Bit SBB Shelf I/O Module

CXO-4821A-MC

Installing the Power Cord
As shown in Figure 2–8, the pedestal input power cable connects to the rear of the distribution unit.
Figure 2–8 Power Cord Routing

INPUT POWER
CORD TO
SECOND UNIT
TO
AC OUTLET

INPUT AC
POWER CORD
CXO-4375A-MC

DIGITAL StorageWorks 16-Bit Pedestals 2–5

Installing a Pedestal

Installing SBBs
The basic rules for installing SBBs are as follows:
•

You always install the primary ac power supply SBB in the bottom shelf slot, Slot 7.

•

You can install either a redundant power supply, or a storage SBB in Slot 6.

•

You can install storage device SBBs in any of the remaining slots (Slots 0 through 5).
___________________ Note _________________________

To increase stability, DIGITAL recommends that you install SBBs starting at the
bottom of the pedestal (slot 6).
____________________________________________________________________
The combinations of the SBB guides, shelf slots, and backplane connectors preclude installing an
SBB incorrectly. Each 3.5-inch SBB occupies one shelf slot; each 5.25-inch SBB occupies three
shelf slots.
Removing or replacing any SBB requires that you remove the front bezel. You may need a key to
unlock the bezel. When you insert an SBB in a slot and fully seat it, the two tabs on the front panel
expand and engage the shelf, thereby securely mounting the SBB. To remove an SBB you press the
two tabs in and remove the SBB.

Checking Pedestal Operation
After you assemble the pedestal you must test its basic functionality.
__________________ Caution _______________________
You should complete the pedestal test before connecting the SCSI cable to the
host or SCSI controller to avoid causing SCSI bus problems.
____________________________________________________________________
Table 2–4 To Check Pedestal Operation
1.

Open the front door and turn on the pedestal power. Observe
the status light emitting diodes (LEDs) on the shelf power
supply in Slot 7 (bottom slot).
•

The power supply status LED (on the right) lights
immediately.

•

The shelf status LED (on the left) is on when both
blowers are at the proper speed.

SHELF STATUS
LED
POWER SUPPLY
STATUS LED

CXO-4377A-MC

2–6 DIGITAL StorageWorks 16-Bit Pedestals

Installing a Pedestal

Observe the LEDs on each SBB.
•

The green activity LEDs initially flash on, and then go
OFF

•

The amber fault LEDs should remain OFF..
ACTIVITY LED
(GREEN)
FAULT LED
(AMBER)

CXO-4378A-MC

Once the initial “spin-up” is complete, the device activity LEDs should flash only when the controller is addressing the device

Turn off the pedestal power before connecting controller SCSI bus cable.

Connecting the Controller
The final phase of the installation is connecting the pedestal to the SCSI controller.
_________________ Caution ________________________
Connecting SCSI cables with power applied to either the pedestal or the controller
can generate signals that will “hang” the SCSI bus. Therefore, always turn off
the power on the pedestal and the host controller before connecting the host SCSI
bus cable.
____________________________________________________________________
Once you have connected the pedestal to the controller, apply power to the pedestal and the
controller, and use the SCSI controller to test all devices for proper operation.

Moving the Pedestal
It may be necessary to move the pedestal for servicing. The rules for moving a pedestal are as
follows:
________________ WARNING _______________________
Use two people to move pedestal since it weighs more than 18 kilograms
(40 pounds) with SBBs and power supplies installed.
____________________________________________________________________
1.

Disable the SCSI bus at the controller.
_________________ Caution ________________________

Always turn the pedestal off and allow the devices allowed to spin down before
moving the pedestal. This will prevent damaging the storage devices.
____________________________________________________________________
1.

When necessary, disconnect the pedestal power cord and the SCSI cables.

Do not lift the pedestal by the bezel or the door.

DIGITAL StorageWorks 16-Bit Pedestals 2–7

3
Operating a Pedestal
This chapter describes the procedures for operating a pedestal to include detecting, isolating, and
eliminating malfunctions. This description does not include configuring the RAID subsystem. The
controller documentation includes the complete a complete description of these procedures.
The pedestal has only one component that can fail—the ac distribution unit. All the replaceable
components are part of the shelf and the associated SBBs. It is possible, but unlikely, that there
would be a failure of the SCSI cables or the ac power cords. The following sections describe error
indications and the possible causes. For a detailed description of possible problems and
recommended solutions, please refer to your shelf user’s guide.

Operational Status
LEDs on the SBB bezels indicate the operational status of the shelf power and cooling and the
storage device SBBs. Open the front door for a better view of the LEDs. For a detailed description
of the SBB status LED, refer to either the SBB User’s Guide (8-bit SBBs) or the 16-Bit SBB User’s
Guide.
Table 3–1 Status LEDs
To determine the status of a power supply or the blowers
1.

Observer the power supply status LEDs

When the ac power is missing, or either the +5 V dc or the
+12 V dc power supply voltages are incorrect, both the shelf
status and the power status LEDs are off.

When either blower assembly fails, the shelf status LED on the
power SBB is off and the power supply status LED is on.

When there is an error indication, complete the procedures in
Table 3–4.

SHELF STATUS
LED
POWER SUPPLY
STATUS LED

CXO-4377A-MC

DIGITAL StorageWorks 16-Bit Pedestals 3–1

Operating a Pedestal

___________________ Note _________________________
The LED positions and functions are identical for both the 3.5-inch and the
5.25-inch SBBs.
____________________________________________________________________
Table 3–2 Status LEDs (Continued)
To determine the status of the SBBs
1.

Observe the individual SBB green activity LED and the amber
fault LED.

Normally the green activity LED is flashing the and amber
fault LED is off.

When there is an error indication complete the procedures in

The power supply certification label lists the power supply
model number and power rating.

ACTIVITY LED
(GREEN)
FAULT LED
(AMBER)

CXO-4378A-MC

CXO-4380A-MC

Replacing SBBs and Power Supplies
The procedure for replacing either a storage device SBB or a power supply is almost identical.
Complete the procedure in Table 3–3 to replace an SBB. To replace a power supply, complete the
procedures in Table 3–4.
__________________ Caution _______________________
The SCSI controller determines the correct procedure for removing and replacing
(“swapping”) an SBB. Check your SCSI controller documentation to determine
the procedures supported.
Unless the controller supports removing or installing an SBB while the SCSI bus
is active, a hot swap, you may corrupt or lose the data.
DIGITAL controllers, such as the HSZ-series, have switches for deactivating
(quiescing) individual buses. Quiescing the bus without turning the SBB shelf
power off to replace an SBB is a warm swap.
____________________________________________________________________

3–2 DIGITAL StorageWorks 16-Bit Pedestals

Operating a Pedestal

Table 3–3 To Replace an SBB
1.

If your controller supports hot swap go to Step 2.
If your controller does not support hot swap, quiesce the SCSI bus.
If you cannot quiesce the SCSI bus, turn the controller off.

Open the door and unlock the bezel.

Grasp the bezel at the bottom. Rotate the bezel out and away until the locking tabs disengage
the base.

Press the SBB mounting tabs together and remove the defective SBB.

CXO-4376A-MC

Check the SBB label on the front of both SBBs and verify that items
identical.
1
2

M, N, R, S, T, and U are

RZ29B-VA
4.3 GB

LUN #

ID #

CH #

10
F10
N
6

N/W
7
CXO-5370A-MC

Transcribe the item

O, P, and Q information to the replacement SBB label.

Insert the replacement SBB and press it firmly into the slot until it is fully seated and the bezel
mounting tabs engage the shelf.

Carefully engage the bezel bottom locking tabs with the base.

Carefully rotate the top of the bezel in towards the pedestal until it mates with the top.

Firmly seat the bezel and ensure that the top and bottom of the bezel are the same distance from
the edge of the shelf.
DIGITAL StorageWorks 16-Bit Pedestals 3–3

Operating a Pedestal

10. Lock the bezel.
11. Apply power, start the SCSI bus, and check that the pedestal is operating correctly.
12. Check the SBB status LEDs for proper operation.
__________________ Caution _______________________
StorageWorks ac power supplies are available in wide range of power ratings
(watts). You can replace a lower rated supply with a higher rated supply. For
example, you can replace a 150 W supply with a 180 W supply. The reverse is
not true. DIGITAL does support replacing a higher rated supply with a lower
rated supply.
The power supply certification label lists the power supply model number and
power rating.
____________________________________________________________________

Table 3–4 To Replace a Power Supply
1.

Turn the pedestal power off. Open the door and unlock the bezel.

Grasp the bezel at the bottom. Rotate the bezel out and away until the locking tabs disengage
the base.

Disconnect the shelf power cords.

Press the power supply bezel mounting tabs together and remove the power supply.

Observe the power supply certification label on both the defective and replacement power
supply and ensure that they are the same model.

Install the replacement power SBB.

Connect the shelf power cord.

Carefully engage the bezel bottom locking tabs with the base.

Carefully rotate the top of the bezel in towards the pedestal until it mates with the top.

10. Firmly seat the bezel and ensure that the top and bottom of the bezel are the same distance from
the edge of the shelf.
11. Lock the bezel.
12. Apply power, start the SCSI bus, and check that the pedestal is operating correctly.
13. Turn on the SCSI bus.

3–4 DIGITAL StorageWorks 16-Bit Pedestals

Operating a Pedestal

Replacing a Blower Assembly
Failure of either blower assembly turns OFF the power supply green shelf status LED; the green
power supply status LED remains ON. Complete the following procedure to replace a defective
blower:
Table 3–5 To Replace a Blower Assembly
1.

Turn off power to the pedestal.

Unlock the rear bezel.
Grasp the rear bezel at the bottom. Rotate the bezel out and away until the locking tabs
disengage the base.

Locate the blower that is not running and remove the safety screw.

Safety
screw
Warning
label
Locking
tab (2)

Connector

CXO4405A

Press in on the two mounting tabs and remove the blower assembly.

Align the connector guide on the replacement blower assembly with the connector on the shelf.

Push in on the blower assembly to fully seat it and the locking tabs engage the shelf.

Install the safety screw.

Carefully engage the bezel bottom locking tabs with the base.

Carefully rotate the top of the bezel in towards the pedestal until it mates with the top.

10. Firmly seat the bezel and ensure that the top and bottom of the bezel are the same distance from
the edge of the shelf.
11. Lock the bezel.
12. Turn on the power. The blower begins operating and both shelf status LEDs are on.

DIGITAL StorageWorks 16-Bit Pedestals 3–5

Operating a Pedestal

Disassembling a Pedestal
Almost all maintenance procedures require you to remove and replace the pedestal bezel. The
procedure in Table 3–6 is the same whether you are removing the front or rear bezel.
Table 3–6 Removing and Installing a Bezel
1.

Open the door and unlock the bezel.

Turn the bus off either at the controller or by turning off the pedestal power.

Grasp the bezel at the top. Rotate the bezel out and down from the pedestal until the bottom
locking tabs disengage from the base.

Once you have removed the bezel, you can remove SBBs, install cables, or complete all other
maintenance procedures

Carefully engage the bezel bottom locking tabs with the base.

Carefully rotate the top of the bezel in towards the pedestal until it mates with the top.

Firmly seat the bezel and ensure that the top and bottom of the bezel are the same distance from
the edge of the shelf.

Lock the bezel.

Apply power, start the SCSI bus, and check that the pedestal is operating correctly.

10. Close the front door.
Table 3–7 To Replace a Shelf
1.

Turn off power for both the pedestal and the controller.

Open the pedestal door and unlock the bezel.

Grasp the bezel at the top. Rotate the bezel out and down from the pedestal at the bottom of the
bezel disengage from the base.

Disconnect all power cords:

Record the slot location of each SBB.

Remove all SBBs.

Disconnect the SCSI cables.
___________________ Note _________________________

The shelf fits tightly into the base and top. You must pull hard to remove the top
from the shelf or the shelf from the base.
____________________________________________________________________
8.

Hold the shelf in place and lift up on the front of the top to disengage it from the shelf.

Hold the base in place and lift up on the shelf to disengage it from the base.

10. Carefully align the replacement shelf mounting slots with the base dimple strips at the REAR of
the base and fully seat the shelf.
11. Carefully align the dimple strips at the rear of the top with the shelf mounting slots and fully seat
it.
12. Connect the SCSI cables to the shelf.
13. Install the shelf power supply.
14. Install the SBBs.
15. Connect the power cords.

3–6 DIGITAL StorageWorks 16-Bit Pedestals

Operating a Pedestal

16. Install the front and rear bezel.
17. Apply power and check pedestal operation.
18. Start the SCSI controller and check that both the controller and the SBBs are operating properly.

DIGITAL StorageWorks 16-Bit Pedestals 3–7

Glossary
ac distribution
The method of distributing ac power in a cabinet.
ac distribution unit
The deskside expansion pedestal ac input device.
ac power supply
See shelf power supply.
adapter
See SCSI signal bus converter.
backplane
The electronic printed circuit board mounted in the rear of the shelf. This board contains the SBB,
power supply, and terminator connectors.
blower assembly
An airflow device mounted in a StorageWorks shelf.
building block shelf
See SBB shelf.
carrier
See modular carrier.
certified device
A storage device that has been tested and found to be in compliance with either an FCC or a CE
certification standard.
channel
Another term for a SCSI bus.
cold swap

Glossary 1

Glossary

A method of device replacement that requires that power be removed from one or more shelves in a
cabinet thereby affecting other devices therein. User applications that are not dependent upon the
devices being swapped continue to function. Use this method when you cannot use either the "warm
swap” or the “hot swap” method. Usually, you use this method only when installing or upgrading a
StorageWorks subsystem.
See also warm swap and hot swap.
compatible device
A storage device that has been tested in a specific enclosure and found to be compatible.
controller
A hardware–firmware device that manages communications on behalf of host systems over the SCSI
bus to devices, such as the HSC–series, HSJ–series, and HSZ–series controllers. Controllers
typically differ by the host interface type and provide functions beyond those the devices support.
controller shelf
A StorageWorks shelf containing a maximum of two controller with cache memory modules and two
shelf power supplies. For example, a BA350–M series shelf.
CE-Mark
A European Economic Community (EEC) certification label that identifies electronic devices
authorized for sale within member nations.
CE-Mark Class A
Similar to, but more stringent than the FCC Class A certification, this certification label appears on
electronic devices that can only be used in a commercial environment. You can also use a CE-Mark
certified device in the United States.
CE-Mark Class B
Similar to, but more stringent than the FCC Class B certification, this certification label appears on
electronic devices that can only be used in either a home or a commercial environment. You can also
use a CE-Mark certified device in the United States.
daisy chain
A common method of connecting ac power or SCSI buses from the source through a shelf or
enclosure to another shelf or enclosure.
dc power supply
See shelf power supply.
deskside expansion unit
An enclosure, commonly referred to as a pedestal, that houses a StorageWorks shelf in a vertical
position. You can assemble a pedestal with a pedestal kit, and a user supplied SBB shelf, storage
SBBs, and an ac power cord. The factors that determine the number of devices you can use, the
SCSI buses supported, and the pedestal location are the SBB shelf type, the storage SBBs, and the
SCSI controller.
disk
A storage device supporting random access to fixed size blocks of data.
2 Glossary-

Glossary

dual power configuration
See redundant power configuration.
DWZZB
The 16-bit single ended compatible SCSI bus signal converter.
See also SCSI bus signal converter.
electromagnetic interference
See EMI.
electrostatic discharge
See ESD.
EMI
Electromagnetic interference. The impairment of a signal by an electromagnetic disturbance.
ESD
Electrostatic discharge is the discharge of a potentially harmful static electric voltage as a result of
improper grounding.
FCC
Federal Communications Commission. The federal agency responsible for establishing standards
and approving electronic devices within the United States.
FCC Class B
This certification label appears on electronic devices that can only be used in either a home or a
commercial environment within the United States. . A CE-Mark certified device can be used in the
United States in the same environment as the equivalent FCC certification..
host
The primary or controlling computer (in a multiple computer network) to which you attach storage
systems.
host computer
See host.
hot swap
A method of device replacement whereby the complete system remains on-line and active during
device removal or insertion. The device being removed or inserted is the only device that cannot
perform operations during this process.
See also cold swap and warm swap.
IEC
International Electrotechnical Committee. An organization that develops and publishes electronic
and mechanical standards.
initiator
A SCSI device (usually a host system) that requests by another SCSI device (a target) to perform an
operation.
Glossary- 3

Glossary

International Electrotechnical Committee
See IEC.
logical bus
A single ended, physical bus connected to a differential, physical bus by a SCSI bus signal converter.
logical units
A group of devices addressable as a virtual unit.
modular carrier
The StorageWorks compatible plastic container in which you can install storage devices or power
supplies to form SBBs. Modular carriers are available in both 3.5-inch and 5.25-inch form-factors.
pedestal
The common name for a deskside expansion unit.
See also deskside expansion unit.
pedestal kit
A kit for converting a customer-supplied StorageWorks shelf into a deskside expansion unit or
pedestal.
physical bus
Two SCSI terminators separated by cables, connectors, and backplane circuitry.
port
(1) A logical route for data in and out of a controller. A port can contain one or more channels, all of
which contain the same type data. (2) The hardware and software that connects a host controller to a
CI, SCSI, or SDI bus.
qualified device
See supported device.
quiesce
To make a bus inactive or dormant. For example, you must quiesce SCSI bus operations when warm
swapping an SBB.
quiescent
Inactive or still, dormant.
radio frequency interference
See RFI.
RAID
Redundant array of independent disks. A set of storage techniques devised to increase the
performance and availability of a storage subsystem.
redundant power configuration

4 Glossary-

Glossary

A capability of StorageWorks cabinet and shelves to ensure there is no single point of power failure.
(1) For a cabinet two ac power sources and two CDUs distributed primary and redundant ac power to
shelf power supplies. (2) For a shelf, the primary and redundant shelf SBB power supplies ensure the
dc power is available even when there is a failure of one supply, one ac source, or one CDU.
Implementing the redundant power configuration provides protection against the loss or corruption of
data.
RFI
Radio frequency interference. The impairment of a signal by an unwanted radio signal or radio
disturbance.
SBB
StorageWorks building block. The basic building block of the product line. Any device conforming
to shelf mechanical and electrical standards installed in either a 3.5-inch or 5.25-inch carrier is
considered to be an SBB, whether it be a storage device, a power supply, or other device.
SBB shelf
The common name for a StorageWorks storage device shelf. This shelf also contains shelf power
supply SBBs.
SCSI
Small computer system interface. This ANSI interface defines the physical and electrical parameters
of a parallel I/O bus used to connect computers and a maximum of seven devices. The
StorageWorks subsystem implementation uses SCSI–2, for the synchronous transfer of 8-bit data at
rates of up to 10 MB/s.
SCSI bus signal converter
Sometimes referred to as an adapter. (1) A connecting device that permits the attachment of
accessories or provides the capability to mount or link units. (2) The device that connects a 16-bit,
differential SCSI bus operating in the 8-bit mode to an 8-bit, single ended SCSI bus. (3) The device
that connects a 16-bit, differential SCSI bus operating in the 8-bit mode to an 16-bit, single ended
SCSI bus.
SCSI busing connection
A connection in the SCSI bus between two terminators such as the SBB shelf SCSI input connector.
SCSI device
A host computer adapter, a peripheral controller, or an intelligent peripheral that can be attached to
the SCSI bus.
SCSI device ID
The bit-significant representation of the SCSI addressing referring to one of the signal lines
numbered 0 through 7 for an 8-bit bus or 0 through 15 for a 16-bit bus. Also referred to as “target
ID”.

Glossary- 5

Glossary

SCSI device-side device address
The 8 (0 through 7) or 16 (0 through 15) device addresses (target IDs) assigned to the SCSI controller
and the devices it controls.
See also SCSI host-side device address.
SCSI end-bus position
The physical location of a controller, a SCSI bus controller, or a device that contains the bus
terminator.
SCSI host-side device address
The eight device addresses (target IDs) assigned to the host device and the SCSI controllers and the
devices it controls.
See also SCSI device-side device address.
SCSI midbus position
The physical location of a controller or a device that the SCSI bus passes through enroute to the
controller or device that contains the SCSI bus termination.
SCSI port
(1) Software: The channel that controls communications to and from a specific SCSI bus in the
system. (2) Hardware: The name of the logical socket at the back of the system unit to which a SCSI
device is connected.
SCSI stubbing connection
A connection in the SCSI bus path between a terminator and a connector, such as a trilink connector,
that is used to place a controller in the midbus position.
SCSI–A cable
A 50-conductor (25 twisted pair) cable used for single ended, SCSI–2 bus connections.
SCSI–P cable
A 68-conductor (34 twisted pairs) cable used for differential bus connections.
shelf power supply
The power supply that provides +5 V dc and +12 V dc to the StorageWorks shelves. These supplies
can be either ac input (120 V ac) or dc (48 V dc).
signal converter
See SCSI bus signal converter.
single ended SCSI bus
A bus in which each signal’s logic level is determined by the voltage of a single wire in relation to
ground.
Small Computer System Interface
See SCSI.
split bus
6 Glossary-

Glossary

A single SBB shelf SCSI bus that is configured as two individual buses (a four-device bus and a
three-device bus) is commonly referred to as a split bus.
spin down
The process that begins when power is removed from a storage device and data transfer halts, and
ends when the device is stopped and can be moved. In the case of disk drives, the heads are retracted
and the media is stopped.
spin up
The process that begins when power is applied to a storage device, and ends when the device is
determined to be operational and ready for data transfer operations.
storage array
An integrated set of storage devices.
storage array subsystem
See storage subsystem.
storage sets
A grouping of disk drives that make up a new distinct container.
storage subsystem
The controllers, storage devices, shelves, cables, and power supplies that form a mass storage
subsystem.
StorageWorks
The DIGITAL set of enclosure products that allows customers to design and configure their own
storage subsystem. Components include power, packaging, and interconnections in a StorageWorks
shelf. SBBs and array controllers are integrated therein to form storage subsystems. System-level
enclosures to house the shelves and standard mounting devices for SBBs are also included.
StorageWorks building block
See SBB.
subsystem array strategy
A strategy, including packaging, devices, and controllers, that provides an integrated storage
subsystem solution.
supported device
(1) A device that has been fully evaluated in an “approved” StorageWorks configuration (that is,
shelf, cabinet, power supply, cabling, and so forth) and is in complete compliance with countryspecific standards (for example, FCC, CE-Mark, CSA, TÜV, VDE, and so forth) and with all
DIGITAL standards. (2) A device supported by a controller or host operating system.
tape
A storage device supporting sequential access to variable sized data records.
tape controller
See controller.

Glossary- 7

Glossary

target
A SCSI device that performs an operation requested by an initiator.
target ID
See SCSI device ID.
UL
Underwriters Laboratories. An organization that tests and certifies electrical devices.
Underwriters Laboratories
See UL.
universal ac input power supply
See shelf power supply.
warm swap
A method of device replacement whereby the complete system remains on-line during device
removal or insertion. The system bus may be halted for a brief period of time, during device
insertion or removal. No booting or loading of code is permitted except on the device being inserted.
User applications that are not dependent upon the devices on the “affected SCSI bus” are not
noticeably impacted.
See also cold swap and hot swap.

8 Glossary-