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EK-350SV-UG-B01

January 1995

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Document:	BA35X-VA Vertical Mounting Kit User's Guide
Order Number:	EK-350SV-UG
Revision:	B01
Pages:	42
Original Filename:

OCR Text

Solutions
BA35X–VA Vertical Mounting Kit
Users Guide
Order Number EK–350SV–UG. B01
This guide describes the procedures for assembling pedestal kits to create either
an 8-bit or a 16-bit deskside expansion pedestals. This guide also includes the
procedures for installing and operating the pedestal, and selecting and
connecting the SCSI bus cables.

Digital Equipment Corporation
Maynard Massachusetts

January 1995 `
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.
© Digital Equipment Corporation 1992, 1995
All Rights Reserved.
Printed in the United States of America.
HSJ, StorageWorks, and the DIGITAL logo are trademarks of Digital Equipment Corporation.
Word for Windows 6.0 is a trademark of Microsoft Corporation.
This document was produced using Word for Windows 6.0

Contents
Chapter 1 Introducing the StorageWorks Pedestals
1.1 Product Description................................................................................................................... 1–2
1.2 Features .................................................................................................................................... 1–3
1.3 Pedestal Components ................................................................................................................ 1–3
1.3.1 StorageWorks Shelves .............................................................................................. 1–4
1.3.2 StorageWorks Building Blocks (SBBs)..................................................................... 1–5
1.4 Power........................................................................................................................................ 1–6
1.5 Cooling ..................................................................................................................................... 1–8
1.6 Product Specifications............................................................................................................... 1–9

Chapter 2 Assembling a Pedestal
2.1 Preparations .............................................................................................................................. 2–1
2.2 Pedestal Kit Packing ................................................................................................................. 2–2
2.3 Selecting the Air Flow Control Baffles ...................................................................................... 2–3
2.4 Assembling the Pedestal............................................................................................................ 2–4

Chapter 3 Installing a Pedestal
3.1 Planning the Installation ........................................................................................................... 3–1
3.2 Selecting the Installation Area .................................................................................................. 3–2
3.3 SCSI Cables.............................................................................................................................. 3–3
3.4 Installing the SCSI Cables ........................................................................................................ 3–3
3.5 Installing the Power Cord.......................................................................................................... 3–5
3.6 Installing SBBs ......................................................................................................................... 3–6
3.7 Checking Pedestal Operation .................................................................................................... 3–7
3.8 Connecting the Controller......................................................................................................... 3–8
3.9 Moving the Pedestal.................................................................................................................. 3–8

Chapter 4 Operating a Pedestal
4.1 Operational Status..................................................................................................................... 4–1
4.2 Replacing an SBB ..................................................................................................................... 4–2
4.3 Replacing a Blower Assembly................................................................................................... 4–4
4.4 Disassembling a Pedestal .......................................................................................................... 4–5

Glossary
Index

iii

Figures
Figure 1–1 Typical Deskside Expansion Pedestal ............................................................................ 1–1
Figure 1–2 Typical 8-Bit SBB Shelf................................................................................................ 1–2
Figure 1–3 Typical 16-Bit SBB Shelf.............................................................................................. 1–2
Figure 1–4 Typical 3.5-Inch SBB..................................................................................................... 1-5
Figure 1–5 Typical 5.25-Inch SBB................................................................................................... 1-5
Figure 1–6 Power Distribution Unit—Front View ........................................................................... 1–7
Figure 1–7 Power Distribution Unit—Rear View ............................................................................ 1–7
Figure 1–8 Blower Assembly Location............................................................................................ 1–8
Figure 1–9 Pedestal Dimensions .................................................................................................... 1–9
Figure 2–1 Pedestal Kit Packing ..................................................................................................... 2–2
Figure 2–2 Air Flow Control Baffles ............................................................................................... 2–3
Figure 2–3 Baffles “A’ and “B”....................................................................................................... 2–3
Figure 2–4 Baffles “A’ and “C” ...................................................................................................... 2–3
Figure 2–5 Baffles “A,” “C,’ and ”D” ............................................................................................. 2–3
Figure 2–6 Pedestal—Exploded View ............................................................................................. 2–5
Figure 3–1 Pedestal Installation Dimensions ................................................................................... 3–2
Figure 3–2 16-bit Personality Module ............................................................................................. 3–3
Figure 3–3 SCSI Cables—Primary Route........................................................................................ 3–2
Figure 3–4 SCSI Cable—Alternate Path ......................................................................................... 3–2
Figure 3–5 Power Cord Routing...................................................................................................... 3–5
Figure 3–6 Shelf Status LEDs ......................................................................................................... 3–7
Figure 3–7 SBB Status LEDs .......................................................................................................... 3–7
Figure 4–1 Power Supply Status LEDs............................................................................................ 4–1
Figure 4–2 3.5-Inch SBB Status LEDs ............................................................................................ 4–2
Figure 4–3 5.25-Inch SBB Status LEDs .......................................................................................... 4–2
Figure 4–4 Removing an SBB......................................................................................................... 4–3
Figure 4–5 Blower Assembly Replacement...................................................................................... 4–4

Tables
Table 1–1 Pedestal Components...................................................................................................... 1–3
Table 1–2 Shelf Features................................................................................................................. 1–4
Table 1–3 Recommended Country-Specific AC Power Cords.......................................................... 1–6
Table 1–4 Typical Pedestal Specifications....................................................................................... 1–9
Table 2–1 To Unpack a Pedestal Kit ............................................................................................... 2–2
Table 2–2 To Assemble a Pedestal .................................................................................................. 2–4
Table 2–3 Pedestal Components...................................................................................................... 2–5
Table 3–4 To Check the Pedestal .................................................................................................... 3–7
Table 4–1 Pedestal Status LEDs...................................................................................................... 4–1
Table 4–2 To Replace an SBB......................................................................................................... 4–2
Table 4–3 To Replace a Power Supply............................................................................................. 4–3
Table 4–4 To Replace a Blower Assembly....................................................................................... 4–4
Table 4–5 Removing and Installing a Bezel .................................................................................... 4–5
Table 4–6 To Replace a Shelf.......................................................................................................... 4–6

Preface
The StorageWorks BA35X–VA Vertical Mounting Kit Users Guide describes the BA35X–VA
pedestal kit and the compatible StorageWorks building block (SBB) shelves. The combination
of this kit and SBB shelves is used to create deskside expansion pedestals. This guide is a
general introduction to the StorageWorks pedestals. The information in this document
supplements, but does not replace, the detailed information contained in the SBB shelf users
guides.

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

Structure
This guide is organized as follows:
Chapter 1

An introduction to the StorageWorks pedestals with general descriptions,
specifications. capabilities, and so forth.

Chapter 2

Procedures for assembling a pedestal using a kit and a user supplied SBB
shelf.

Chapter 3

General instructions for planning and completing an installation

Chapter 4

A description of how to determine the operational status of a pedestal and
basic replacement procedures.

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

Order Number

StorageWorks Solutions BA350-K Series 8-Bit Deskside Pedestal Users
Guide

EK–350-KF–UG

StorageWorks Solutions BA356 16-Bit Shelf and SBB Users Guide

EK–BA356–UG

StorageWorks Solutions BA356-K Series 16-Bit Deskside Pedestal
Users Guide

EK–356KB–UG

StorageWorks Solutions Configuration Guide

EK–BA350–CG

StorageWorks Solutions Shelf and SBB Users Guide (8-bit)

EK–BA350–UG

Documentation Conventions
The following conventions are used in this guide:
boldface type Boldface type indicates the first instance of terms being defined in the
text, the glossary, or both.
italic type Italic type indicates emphasis and complete guide titles. In the
glossary, italic type also is used to indicate cross-references.

1
Introducing the
StorageWorks Pedestals
™

This chapter describes the StorageWorks BA35X–VA vertical mounting kit (pedestal kit).
With this kit and an SBB shelf you can create either an 8-bit (BA350 series) or a 16-bit
(BA356 series) series deskside expansion pedestal (pedestal). This description includes
features, specifications, and compatibility with other StorageWorks products, and small
computer system interface (SCSI) controllers.
Note
In this guide, the term “pedestal kit” refers to the BA35X–VA vertical mounting
kit. The term “pedestal” refers to both the 8-bit and 16-bit deskside expansion
pedestals.
Figure 1–1 Typical Deskside Expansion Pedestal

CXO-4371A-MC

™

Trademark of Digital Equipment Corporation.

Introducing the StorageWorks Deskside Pedestals 1–1

1.1 Product Description
The pedestal kit encloses individual StorageWorks building block shelves (SBB shelves) to
create pedestals similar to the one shown in Figure 1–1.
This low-cost, mass storage solution enables you to design and configure an extremely flexible
storage array to meet both your current and future needs. The basic component of the deskside
expansion pedestal is an SBB shelf—either an 8-bit, single-ended SCSI bus shelf
(Figure 1–2), or a 16-bit, single-ended SCSI bus shelf (see Figure 1–3).
Figure 1–2 Typical 8-Bit SBB Shelf

(7)
POWER

Figure 1–3 Typical 16-Bit SBB Shelf

0
SCSI
CONNECTORS

CXO-4319A-MC
CXO-4436A-MC

These shelves 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. The
SCSI bus controller capabilities can restrict the number of SBBs, the SBB types, and the
combination SBB types you install.
You have the option of using any of the StorageWorks compatible disk drives, tape drives,
CD-ROMs, or other storage devices mounted in an SBB.
The shelf used determines the following:

•
•

SCSI bus width (8-bit or 16-bit)
Possible SCSI bus configurations

Maximum SCSI cable lengths
Device address range

Note
You can use the DWZZA- (8-bit) or DWZZB-series (16-bit) SCSI bus converter to
connect a SCSI controller differential bus to a shelf single-ended bus.
Both the 8-bit and 16-bit shelves have 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. Use SBBs with FCC Class A certification in a
commercial environment.
CAUTION
There is no provision for installing a BA350–M series controller shelf in a
BA35X–VA pedestal kit to create a deskside expansion pedestal. Digital neither
support nor recommends such a configuration.

1–2 Introducing the StorageWorks Deskside Pedestals

1.2 Features
All StorageWorks pedestals have the following features:

•
•

Locking front and rear bezels that
prevent removal SBBs
Flexibility to design a storage array
subsystem that meets your specific
needs

•
•
•

Low-cost SCSI device storage
subsystems
An ac distribution unit with switchcontrolled ac outputs
Capability of “daisy-chaining” the ac
input power to multiple pedestals

The shelves and SBBs used in these pedestals have the following features:

•
•
•
•

Capability to mix 3.5-inch and 5.25inch form-factor storage devices in a
single pedestal
Redundant power option
Optional battery backup unit (BBU)
Redundant blower assemblies

•
•
•

Visual shelf status (power, cooling)
indicators
Visual storage device status
(operation, fault) indicators
Easily removed and installed storage
devices

1.3 Pedestal Components
Table 1–1 lists the pedestal components and their source. The pedestal kit includes the
enclosure plastics, the ac distribution unit with two shelf power cords and a power cord for
“daisy-chaining” multiple pedestals. It does not include the shelves, storage devices, the shelf
SBB power supplies, or the country-specific power cord. You can order these items through
your Digital account representative.
Table 1–1 Pedestal Components
Description

Qty
Comment
Pedestal Kit Components
AC distribution unit
1
Base
1
Has holes for mounting feet
Bezel clips
8
Bezel with a door, lock, and key
2
Front and Rear Bezels are identical
Feet
2
Interchangeable
Top
1
User Supplied Components
AC input power cord
1
See Table 1–3
Battery backup unit
Optional
SBB shelf
1
SCSI cables
A/R
Shelf ac power supply
1
Storage SBBs
A/R

Introducing the StorageWorks Deskside Pedestals 1–3

1.3.1 StorageWorks Shelves
Table 1–2 compares the basic features of the 8-bit (BA350) and the 16-bit (BA356) shelves.
Table 1–2 Shelf Features
Feature
8-Bit, Single Ended SCSI Bus
16-Bit, Single Ended SCSI Bus
Device Addresses
0–7
8–14
SCSI Cable Connections
50-pin, high-density
68-pin, high-density
SCSI Bus Adapters
SCSI Bus Configurations
Single Bus
Split-bus
SCSI Bus Configuration Control

Storage Devices
3.5-inch
5.25-inch
5.25-inch tape drive with loader
SBB Power Supplies
ac input
Battery Backup Unit (BBU)
dc input
Blower Assemblies
Single speed
Dual speed

8-Bit Shelf
YES
No

16-Bit Shelf
YES
YES

YES
No

YES
YES

Backplane
None

None
16-bit Personality Module

DWZZA–VA (Slot 0)

DWZZB–VB (Slot 0)

YES
YES

Backplane (Terminator Board
and Jumper Board)

Personality Module

YES
YES
No

YES —Primary–Slot 7
Redundant–Slot 6
YES—Slot 6
No
YES
YES

1–4 Introducing the StorageWorks Deskside Pedestals

YES—Primary–Slot 7
Redundant–Slot 6
YES—Slot 6
No
No
YES

1.3.2 StorageWorks Building Blocks (SBBs)
The primary factors in determining compatible storage devices are as follow:
1.

The SCSI controller must support all the SBBs.

The SCSI controller must support all the combinations of devices on the same SCSI bus.

You cannot install tape storage devices with a loader (for example, the TLZ6L–VA
cartridge tape drive) in a pedestal.

Mounting a storage device in a modular carrier creates an SBB. These carriers are available
in two form-factors—3.5-inch (see Figure 1–4) and 5.25-inch (see Figure 1–5). All power
supplies and battery backup units are 3.5-inch SBBs.
Review the StorageWorks Solutions Configuration Guide to determine the available SBBs.
Remember:

•
•

You cannot install tape drives with loaders
Your SCSI controller must support the devices

Figure 1–4 Typical 3.5-Inch SBB

Figure 1–5 Typical 5.25-Inch SBB

CXO-4379A-MC
CXO-4380A-MC

CAUTION
The SCSI controller capability determines the procedure for removing and
replacing (“swapping”) and 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 HSJ-series, have switches for deactivating
(quiescing) individual buses. Quiescing the bus without turning the SBB shelf
power off and replace an SBB is a warm swap.

Introducing the StorageWorks Deskside Pedestals 1–5

1.4 Power
AC power passes through the ac distribution unit to the shelf power supply SBB. 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 (Figure 1–6)

−

One 4.0 amp power cord for second pedestal (see Figure 1–7)

User-selected, country-specific power cords (see Table 1–3)
Note
The pedestal kit does not contain any external power cords.
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.

Table 1–3 Recommended Country-Specific AC Power Cords

Country

Voltage

Amps

Connector Type

Plug Type

Length
M
Ft

Order No.

Australia
Central Europe
Denmark
India
Ireland
Israel
Italy
Japan
New Zealand
South Africa
Switzerland
United Kingdom
United States

250 V ac
250 V ac
250 V ac
250 V ac
250 V ac
250 V ac
250 V ac
125 V ac
250 V ac
250 V ac
250 V ac
250 V ac
125 V ac

10 A
10 A
10 A
10 A
10 A
10 A
10 A
15 A
10 A
10 A
10 A
10 A
15 A

IEC 320 C13, C14
IEC 320 C13, C14
IEC 320 C13, C14
IEC 320 C13, C14
IEC 320 C13, C14
IEC 320 C13, C14
IEC 320 C13, C14
IEC 320 C13, C14
IEC 320 C13, C14
IEC 320 C13, C14
IEC 320 C13, C14
IEC 320 C13, C14
IEC 320 C13, C14

AS3112–1981
CEE 7/7 (Schuko)
Afsnit 107
BS 546
BS 1363
SI 32
CEI 213–16/VII
NEMA 5–15
AS3112–1981
BS 546
SEV 1011
BS 3163
NEMA 5–15

2.5
2.5
2.5
2.5
2.5
2.5
2.5
3.0
2.5
2.5
2.5
2.5
3.0

BN19H–2E
BN19C–2E
BN19K–2E
BN19S–2E
BN19A–2E
BN18L–2E
BN19M–2E
BN27S–03
BN19H–2E
BN19S–2E
E0–BN19H–2E
BN19A–2E
BN27S–03

1–6 Introducing the StorageWorks Deskside Pedestals

8.2
8.2
8.2
8.2
8.2
8.2
8.2
9.8
8.2
8.2
8.2
8.2
9.8

Figure 1–6 Power Distribution Unit—Front View

POWER
SWITCH

SHELF
POWER
CORDS
CXO-4417A-MC

Figure 1–7 Power Distribution Unit—Rear View

AC INPUT
RECEPTACLE

SECOND
UNIT POWER
CORD
CXO-4418A-MC

Introducing the StorageWorks Deskside Pedestals 1–7

1.5 Cooling
The two 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 shelf, and out the rear. Digital
recommends you replace a defective blower immediately, even though one blower provides
enough air flow to keep the devices operating. Installing air flow control baffles (see Section
2.3) improve cooling within the pedestal.
The safety screw and two “press-to-release” mounting tabs secure each blower assembly to the
shelf.
CAUTION
You can install either a single-speed or a dual speed blowers in an 8-bit shelf.
Install only dual speed blowers in a 16-bit shelf. Do not install both single speed
and dual speed blowers in any shelf.
Figure 1–8 Blower Assembly Location

BLOWER
ASSEMBLY

CXO-4414A-MC

1–8 Introducing the StorageWorks Deskside Pedestals

1.6 Product Specifications
Table 1–4 and Figure 1–9 show the basic pedestal specifications.
Figure 1–9 Pedestal Dimensions

Table 1–4 Typical Pedestal Specifications
Physical Specifications
Nominal Dimensions
Item
Metric
Height
0.6 m
Width
0.3 m
Depth
0.4 m
Weight (no devices)
17 kg
Rear clearance (air exhaust)
0.3 m
Front clearance (door opening)
0.3
Dimensions with Service Areas
Front service area
0.8 m
Rear service area
0.8 m
Vertical service area
0.4 m
Height
1m
Width
0.8 m
Depth
1.9 m

0.8 m
(2.5 ft)

English
2 ft
1 ft
1.3 ft
37 lb
1 ft
1 ft
1m
(3.3 ft)

2.5 ft
2.5 ft
1.3 ft
3.3 ft
2.5 ft
6.3 ft

Pedestal Power
Nominal Output Voltages
Mode 1
+5 V dc
+12 V dc
Mode 2
+5 V dc
+12 V dc
Disk spinup

Power Supply
131 W
150 W
5.6 A
10.75 A

8.4 A
9.0 A

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

15.0 A
15.0 A
3.0 A
6.25 A
4 second interval
(minimum)

Introducing the StorageWorks Deskside Pedestals 1–9

2
Assembling a Pedestal
This chapter describes the procedures for assembling a pedestal using the BA35X–VA vertical
mounting kit and an SBB shelf.
Note
The user supplies the SBB shelf, storage SBBs, power SBBs, and the pedestal
power cord.

2.1 Preparations
To expedite the process complete the following procedures before starting to assemble a
pedestal.

•
•
•
•

•
•

Determine the device address for each storage SBB.
Determine the shelf location for each storage SBB.
Set the SBB device address switches.
Determine the shelf SCSI bus configuration (single or split) and
−

Install the terminators and jumpers on an 8-bit shelf

−

or set the bus configuration switches on the 16-bit shelf personality module.

Determine the optimum routing for the SCSI cables (shortest possible distance).
Select the base baffle for the 16-bit shelf (see Section 2.3)

Assembling a Pedestal 2–1

2.2 Pedestal Kit Packing
Refer to Figure 2–1 and complete the procedures in Table 2–1 to unpack a pedestal kit.
Table 2–1 To Unpack a Pedestal Kit
1.

Carefully remove all packing materials and components.

Remove components from shipping container.

Remove components from plastic shipping bags.

Replace all packing material, including plastic bags, in shipping container.

Store the shipping container for future use.
Note
Retain all packing materials for future use. Shipping pedestal kits without using
the proper packing materials can cause damage to the kits.

Figure 2–1 Pedestal Kit Packing

TOP

BEZELS (2)

FOAM BLOCK BAFFLES
BASE

AC DISTRIBUTION
UNIT
CXO-4281A-MC

2–2 Assembling a Pedestal

2.3 Selecting the Air Flow Control Baffles
The foam block shown in Figure 2–2 has four precut air flow control baffles (A, B, C, and D).
These baffles improve SBB cooling by controlling the circulation of the blower exhaust air
within the pedestal. See Figure 2–3 through Figure 2–5 to determine where to install these
baffles.
Note
Installing a 7200 rpm device in an 8-bit pedestal requires the BA35X–MJ 8-bit
pedestal dual speed blower upgrade kit,
Figure 2–2 Air Flow Control Baffles

Figure 2–4 Baffles “A’ and “C”

BAFFLE "A"
BAFFLE "D"

BAFFLE "A"
(2X)

BAFFLE "B"

BAFFLE "C"

CXO-4509B-MC

Install this baffle in the top of all
pedestals as shown. It has two slits for
inserting the SCSI cables.

BAFFLE "C"
(2X)

6
POWER

AC
DISTRIBUTION

CXO-4511B-MC

Baffle
C

AIR FLOW
CONTROL
BLOCK "A"

POWER

Figure 2–3 Baffles “A’ and “B”
Baffle
A

Install this baffle in the base when using a
multiple pedestal configuration.

Figure 2–5 Baffles “A,” “C,’ and ”D”

1
2

BAFFLE "A"
(3X)

3
4

5
6
POWER
AIR FLOW
CONTROL
BLOCK "B"

AC
DISTRIBUTION

CXO-4510A-MC

Baffle
B

BAFFLE "C"
(2X)

Install this baffle in the base of a single
pedestal.

POWER

AC
DISTRIBUTION

BAFFLE "D"
CXO-4512B-MC

Baffle
D

Install this baffle when using a multiple
pedestal configuration (three or more
pedestals).

Assembling a Pedestal 2–3

2.4 Assembling the Pedestal
You do not need any special tools, test equipment, or techniques to assemble a pedestal.
Figure 2–6 shows the pedestal components, and Table 2–3 lists the components and identifies
those that are part of the pedestal kit and those that the user supplies.
Refer to Figure 2–6 and complete the procedure in Table 2–2 to assemble a pedestal.
CAUTION
The two “u-shaped” bezel support brackets on the base and top are not handles.
Do not use them to move the pedestal.
Table 2–2 To Assemble a Pedestal
1.

Position the base baffle (refer to Section 2.3) midway between the front and rear of the
base. The baffle must completely block air flow through the base. Be sure that the baffle is
not bent or folded.

Install the feet.

Place the base in the selected installation area with the “dimple strips” at the rear.

Press the 0 switch on the ac distribution unit to turn off the ac output. Insert the
distribution unit in the base with the power switch to the front.

Carefully align the SBB shelf mounting slots with the dimples at the REAR of the base
and insert the empty SBB shelf in the base with Slot 7 at the bottom. Push down until it
snaps into place.

Install the shelf SBB power supply in the bottom shelf slot (Slot 7).

Connect one of the ac distribution unit power cords to the shelf SBB power supply.

If there is a redundant shelf SBB power supply or battery backup unit (BBU) install it in
Slot 6. Connect the second ac distribution unit power cord to the redundant shelf SBB
power supply.

On an 8-bit pedestal:

•
•

Connect the SCSI input cable to shelf connector JA1 (leftmost connector).
Connect the SCSI output cable to shelf connector JB1 (rightmost connector).

10. On the 16-bit pedestal

•
•

Connect the SCSI input cable to the input (upper) connector on the personality
module and tighten the thumbscrews.
Install the adapter module into the shelf and firmly seat it.

11. Insert the SCSI cables into Baffle “A.”
12. Install the storage device SBBs starting with the lowest open slot (Slot 6 or Slot 5).
13. Position Baffle “A” near the center of the Top between a set of ribs. Be sure that the baffle
is neither bent or folded.
14. Align the dimple strips in the Top with mounting holes in the shelf.
15. Press down on the Top until it snaps into place.

2–4 Assembling a Pedestal

16. Carefully engage the locking tabs at the bottom of the bezel with the base.
17. Carefully rotate the top of the bezel in towards the pedestal until it mates with the top.
18. Be sure that the bezel is firmly seated and that the top and bottom of the bezel are the
same distance from the edge of the shelf.
19. Lock the bezel.
Table 2–3 Pedestal
Components

Figure 2–6 Pedestal—Exploded View
2

Pedestal Kit Components
No. Description
Front and rear bezel with
door, bezel lock with key,
and 4 bezel clips
Top

u
v
w
x
y

AC distribution unit
Base with feet
Baffles foam block

User Supplied Components
No. Description
SBB shelf with blower
assemblies, shelf power
supply, and storage SBBs
AC input power cord

j
k
l

SCSI cables
3

4
2
3
CXO-4413A-MC

Assembling a Pedestal 2–5

3
Installing a Pedestal
This chapter describes the procedures for installing either an 8-bit (BA350 series) or a 16-bit
(BA356 series) pedestal. Subjects include planning the installation; initial installation
procedures; storage device security; replacing storage devices; testing the pedestal; connecting
the SCSI cables to the SCSI controller; and connecting the power cables.

3.1 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.

•
•
•

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.

Installing a Pedestal 3–1

3.2 Selecting the Installation Area
The location of the pedestal depends upon the following:

•
•
•

The space required for the pedestal to include service areas.
The length of the SCSI bus cable.
The location of the ac power source.

The general guidelines for selecting the installation area are:

•
•
•
•
•

Routine operations require a front service area of at least 0.8 m (30 in).
The pedestal requires at an area at least 0.3 m (1 ft) wide.
Proper air flow requires a rear service area of at least 0.3 m (1 ft)
Replacing a blower assembly on any pedestal or changing the 8-bit pedestal bus
configuration requires a rear service area of at least 0.8 m (30 in) or that you move the
pedestal.
For proper servicing the pedestal installation area should be at least 1 m (3 ft) high.

As shown in Figure 3–1 the maximum area required for a single pedestal is :

•

1.9 m (6.3 ft) deep

•

0.8 m (2.5 ft) wide

•

1 m (3.3 ft) high

Figure 3–1 Pedestal Installation Dimensions
0.8 m
(2.5 ft)

1m
(3.3 ft)

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

3–2 Installing a Pedestal

3.3 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

Please refer to the following publications for detailed information about the SCSI buses and
cables.
StorageWorks Solutions Configuration Guide
StorageWorks Solutions BA350–SB Shelf and SBB Users Guide (8-bit shelves)
StorageWorks Solutions BA356–SB 16-Bit Shelf and SBB Users Guide
Once you have selected the cable you must determine the best route 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 is within the pedestal.

3.4 Installing the SCSI Cables
The SCSI cables connect to either the shelf backplane connectors (8-bit shelf) or the
personality module connectors (16-bit shelf). You can install the cable either through the rear
of the pedestal (the primary route) or through the top of the pedestal (the alternate route). The
primary route (see Figure 3–3) or the alternate route (see Figure 3–4). The SCSI cables
connect to the backplane connector on the 8-bit shelf (adjacent to Slot 0) and to the personality
module on a 16-bit shelf (see Figure 3–2).
Figure 3–2 16-bit Personality Module
Note
ON

1 2 3 4 5 6 7

For detailed information about setting the
personality module address switch, and
connecting multiple shelves together, refer to
the BA356–SB 16-Bit Shelf and SBB Users
Guide.

JA1
JB1

CXO-4415A-MC

Installing a Pedestal 3–3

Figure 3–3 SCSI Cables—Primary
Route
JA1

Figure 3–4 SCSI Cable—Alternate
Path
0.3 m
(1 ft)

JB1

0.6 m
(2 ft)

TO
HOST
CXO-4374A-MC

.4 m
(1.3 ft)

CXO-4404A-MC

3–2 Installing a Pedestal

3.5 Installing the Power Cord
As shown in Figure 3–5, the pedestal power cable connects to the rear of the distribution unit.
pedestal.
Figure 3–5 Power Cord Routing

TO
AC OUTLET
CXO-4375A-MC

Installing a Pedestal 3–5

3.6 Installing SBBs
The universal ac input power supply SBB is always mounted in the bottom shelf slot, Slot 7.
Storage device SBBs can be installed in any of the other seven slots (Slots 0 through 6). Either
a redundant power supply, a BBU, or a storage SBB can be installed in Slot 6.
The combination of the SBB guides, shelf slots, and backplane connectors preclude installing
an SBB incorrectly; you can insert and seat an SBB only one way. Each 3.5-inch SBB
occupies one shelf slot; each 5.25-inch SBB occupies three shelf slots.
Remove the front bezel to access the SBBs.. You may need a key to remove the bezel.
Depending upon the SCSI controller used, you could have the option of removing and
installing an SBB while power is applied to the shelf. The process of removing or installing an
SBB while the bus is inactive and power is applied is commonly referred to as a “warm
swap.”
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.
CAUTION
The procedure for removing or installing SBBs is determined by the SCSI
controller. Check your SCSI controller documentation to determine the procedures
supported.
Removing or installing an SBB while the SCSI bus is active, a hot swap, can
result in corrupted or lost data if the controller does not support hot swap.
Digital controllers, such as the HSJ-series, have switches for deactivating
(quiescing) individual buses. Quiescing the bus without turning the SBB shelf
power off and replace an SBB is a warm swap.
If you cannot quiesce the bus, you must turn off the power to all SBB shelves on the SCSI bus
before you remove or install an SBB. This procedure is referred to as a “cold swap.”

3–6 Installing a Pedestal

3.7 Checking Pedestal Operation
When you order a pedestal, it is shipped with the storage SBBs and power SBBs installed.
Therefore, once you have connected the ac power cable and the SCSI cable, you can test the
basic functionality.
CAUTION
To prevent SCSI bus problems, complete pedestal test without connecting the
SCSI cable to the host or SCSI controller.
Table 3–4 To Check the Pedestal
1.

Open the front door and turn on the pedestal power. Refer to Figure 3–6 and observe the
status light emitting diodes (LEDs) on the shelf power supply in Slot 7 (bottom slot).

•
•
2.

The power supply status LED (on the right) lights immediately.
The green, shelf status LED (on the left) is on when both blowers are at the proper
speed.

Refer to Figure 3–7 and observe the LEDs on each SBB.

•
•

The green activity LEDs initially flash on, and then go off.
The amber fault LEDs should remain off.

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.

Figure 3–6 Shelf Status LEDs

Figure 3–7 SBB Status LEDs

SHELF STATUS LED

ACTIVITY LED
(GREEN)
POWER SUPPLY
STATUS LED

FAULT LED
(AMBER)

CXO-4377A-MC

CXO-4378A-MC

Installing a Pedestal 3–7

3.8 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. These
procedures are described in the controller user documentation.

3.9 Moving the Pedestal
Once you have installed the pedestal it may be necessary to move it for servicing. The rules for
moving a pedestal are as follows:
WARNING
Use two people to move the pedestal when it weighs more than 18 kilograms
(40 pounds).
1.

Disable the SCSI bus at the controller.

Always turn the pedestal off and allow the devices to spin down to protect the disk drives.

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

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

3–8 Installing a Pedestal

4
Operating a Pedestal
This chapter describes the procedures for detecting, isolating, and eliminating malfunctions in
the pedestal. The pedestal has only one component that can fail—the ac distribution unit. This
is not a user replaceable unit, but one that can be replaced by a Digital customer service
engineer.
All of 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 the shelf users guide.

4.1 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 LEDs, please refer to the BA350–SB Shelf and SBB Users Guide.
Table 4–1 Pedestal Status LEDs
To determine the status of a power supply

•
•

Observe the power supply status LEDs.
When the ac input 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.

Figure 4–1 Power Supply Status LEDs

When there is a power supply error indication,
complete the procedures in Table 4–3.
SHELF STATUS LED

To determine the status of a blower

•
•

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

POWER SUPPLY
STATUS LED

CXO-4377A-MC

When there is a blower assembly error
indication, complete the procedures Table 4–4.

Operating a Pedestal 4–1

Figure 4–2 3.5-Inch SBB Status LEDs

ACTIVITY LED
(GREEN)
FAULT LED
(AMBER)

CXO-4378A-MC

To determine the status of an SBB

•
•

Observe the green activity LED and the
amber fault LED.

Figure 4–3 5.25-Inch SBB Status LEDs

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

When these conditions are not met complete the
procedures in Table 4–2.

CXO-4380A-MC

4.2 Replacing an SBB
Replacing either a storage device SBB or a power supply or is basically the same. Refer to
Figure 4–4 and complete the procedure in either Table 4–2 or Table 4–3 to replace a pedestal
SBB.
Table 4–2 To Replace an SBB
1.
2.
3.

Turn the SCSI bus off.
Remove the front bezel as described in Table 4–5.
Press the mounting tabs on the SBB bezel together and pull the SBB out as shown in
Figure 4–4.
Insert the same model SBB in the slot and push it in until it is fully seated and the front
panel mounting tabs expand and engage the shelf.
Replace the front bezel as described in Section 4.4.

6.
7.

Turn on the SCSI bus.
Check the SBB status LEDs for proper operation.

4–2 Operating a Pedestal

Table 4–3 To Replace a Power Supply
1.
2.
3.

Turn the SCSI bus off.
Turn the pedestal power off.
Remove the front bezel as described in Table 4–5.

4.
5.

Disconnect the shelf power cords.
Press the mounting tabs on the SBB bezel together and pull the power supply out as
shown in Figure 4–4.

Install the replacement power SBB.

Connect the shelf power cord.

Replace the front bezel as described in Section 4.4.

Turn on the pedestal power.

10. Check the power supply status LEDs for proper operation.
11. Turn on the SCSI bus.
Figure 4–4 Removing an SBB

CXO-4376A-MC

Operating a Pedestal 4–3

4.3 Replacing a Blower Assembly
Failure of either blower assembly turns off the green shelf status LED; the green power supply
status LED remains on. Complete the following procedure to replace a defective blower:
CAUTION
Blower assemblies can be replaced without turning off the pedestal power.
However, if you have to move the pedestal to replace the blower, you must quiesce
the bus and turn power off to the pedestal to prevent damaging the storage devices
when moving the pedestal.
Table 4–4 To Replace a Blower Assembly
1.

Remove the rear bezel as described in Table 4–5.

Locate the blower that is not running and remove the safety screw (see Figure 4–5).

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

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

Push in on the blower assembly until it is fully seated and the locking tabs engage the
shelf.

Install the safety screw.

Turn on the power. The blower begins operating and shelf status LEDs are both on.

Replace the rear bezel as described in Table 4–5.

Figure 4–5 Blower Assembly Replacement

GUIDE
SAFETY
SCREW

LOCKING
TAB (2)

CXO-4405A-MC

4–4 Operating a Pedestal

4.4 Disassembling a Pedestal
Almost all maintenance procedures require you to remove and replace the pedestal bezel. The
procedure in Table 4–5 is the same whether you are removing the front or rear bezel.
Table 4–5 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 and rotate the bezel out and down from the pedestal until the
locking tabs at the bottom of the bezel disengage the base.

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

Carefully engage the locking tabs at the bottom of the bezel with the base.

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

Be sure that the bezel is firmly seated and that the top and bottom of the bezel are the
same distance from the edge of the shelf.

Lock the bezel.

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

10. Close the front door.

Operating a Pedestal 4–5

Table 4–6 To Replace a Shelf
1.

Remove both bezels as described in Table 4–5

Disconnect all power cords:

Record the slot in which each SBB is installed.

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
or the shelf.

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.

Carefully align the replacement shelf mounting slots with the base dimple strips at the
REAR of the base and fully seat the shelf.

Carefully align the dimple strips at the rear of the top with the shelf mounting slots and
fully seat it.

10. Connect the SCSI cables to the shelf.
11. Install the shelf power supply.
12. Install the SBBs.
13. Connect the power cords.
14. Install the front and rear bezel as described in Table 4–5.
15. Apply power and check pedestal operation.

4–6 Operating a Pedestal

Glossary
ac distribution unit
The deskside expansion pedestal ac input device.
battery backup unit
See BBU.
BBU
Battery backup unit. Extends power availability after the loss of primary ac power, or a power
supply to protect against the corruption or loss of data.
blower assembly
An airflow device mounted in a StorageWorks shelf.
building block shelf
See SBB shelf.
cold swap
A method of device replacement that requires that power be removed from all shelves in a
cabinet. This method is used when conditions preclude the use of the warm swap or hot swap
methods.
See also warm swap and hot swap.
controller
A hardware/software device that facilitates communications between a host and one or more
devices. A controller translates bus protocols and hardware interfaces and adds functionality to
the host/device communications.
controller and SBB shelf
A generic reference to a StorageWorks shelf that can contain both controller SBBs and storage
SBBs (for example, a BA350–EA shelf).
controller shelf
A StorageWorks shelf designed to contain controller and cache memory modules.
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.
pedestal kit
The enclosure, ac distributions unit, and universal ac shelf power supply used to create a
deskside expansion pedestal. Also referred to as a pedestal kit.
deskside expansion pedestal
An enclosure, commonly referred to as a pedestal, that houses a StorageWorks shelf in a
vertical position. This pedestal is assembled from a pedestal kit, and a user supplied SBB
shelf, storage SBBs, and an ac power cord. The number of devices that can be used, the SCSI
buses supported, and the location of the pedestal is determined by the SBB shelf, the storage
SBBs, and the SCSI controller used. Also referred to as a pedestal.

Glossary–1

host computer
Commonly referred to as the host, this is the primary or controlling computer to which a
storage subsystem is attached.
hot swap
A method of device replacement whereby the complete system remains on line and active
during device removal and reinstallation. The device being removed or reinstalled is the only
device that cannot perform operations during this process.
See also cold swap and warm swap.
modular carrier
The plastic container in which storage devices or power supplies are mounted to form SBBs.
Modular carriers are available in both 3.5-inch and 5.25-inch form-factors.
redundant power option
The capability of StorageWorks shelves to have either a primary and secondary shelf power
supply. Should one supply fail, the second supply provides the power required for proper
operation. Implementing this option extends the operational time of the shelf.
Note
Having a primary power supply and a battery backup unit (BBU) does not provide
redundant power. The BBU only provides enough power to allow the devices to
spin-down, thereby preventing data corruption.
SBB
StorageWorks building block. A device housed in a standard StorageWorks SBB carrier. An
SBB has a standard physical and electrical interface that is compatible with those of
StorageWorks shelves and enclosures.
SBB shelf
StorageWorks building block shelf. A StorageWorks shelf, such as the BA350–SB, designed
to house plug-in SBB modules.
SCSI
Small computer system interface. An ANSI interface defining the physical and electrical
parameters of a parallel I/O bus used to connect hosts to a maximum of seven devices. The
StorageWorks device interface is implemented according to the SCSI–2 standard, allowing the
synchronous transfer of 8-bit data at rates of up to 10 MB/s.
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
The 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.

2–Glossary

storage array subsystem
The controllers, storage devices, shelves, cables, and power supplies that form a mass storage
subsystem.
StorageWorks
Digital's family of modular data storage products that allows customers to design and
configure their own storage subsystems. Components include power, packaging, cabling,
devices, controllers, and software. Customers can integrate devices and array controllers in
StorageWorks enclosures to form storage subsystems.
StorageWorks building block
See SBB.
universal ac input power supply
A StorageWorks power supply that produces +5 V dc and +12 V dc power from an ac input.
warm swap
A controller function that allows devices to be added, removed, or replaced while the
subsystem remains operational. All activity on the device's SCSI bus must normally be halted
for the duration of the warm swap operation.
See also cold swap and hot swap.

Glossary–3

Index
—B—

—P—

BA350–M series, 1–2
BA356–KB. See Deskside
pedestal.
BA35X–VA. See Deskside
pedestal.
Blower assembly, 1–8
replacing, 4–4
status, 4–1
Building block shelves. See SBB
shelves.
Building blocks. See SBB.

Pedestal kit, 1–1, 1–2
unpacking, 2–2
Power
AC distribution unit, 1–3, 1–6
ac input voltage, 1–6
ac outputs, 1–6
battery backup unit, 1–3
daisy-chaining, 1–3
power cord, 1–3, 1–6
power supply status, 4–1
redundant power option, 1–3
shelf power supply, 1–3
supply status, 3–7
supply testing, 3–7
switch controlled, 1–6

—C—
Cold swap, 3–6
Controller, 1–1
Controller shelf, 1–2

—D—
Deskside expansion pedestal. See
Deskside pedestal.
Deskside pedestal, 1–1, 1–2
assembly, 2–1
BA350–KB, 2–1
BA356–KB, 1–1
BA35X–VA, 1–1
installation environment, 3–1
installation planning, 3–1
maintaining, 4–1
removing the bezel, 4–5
testing, 3–7

—F—
FCC certification, 1–2, 3–1

—H—
Hot swap, 1–5, 3–6

SCSI controller, 3–8
Small computer system interface.
See SCSI.
Storage array, 1–2, 1–3

—T—
Tape storage device loader, 1–5
Target ID. See SCSI bus device
address

—W—
Warm swap, 1–5, 3–6

—S—
SBB, 1–2, 3–6
3.5-inch, 1–2, 3–6
5.25-inch, 1–2, 3–6
form-factor, 1–3
installing, 3–6
removal, 3–6
Storage device status, 1–3, 3–7
storage device testing, 3–7
SBB shelf
status, 4–1
SBB shelves, 1–2
status, 1–3
SCSI, 1–1
bus
configurations, 1–2
device address, 1–2
single-ended bus, 1–2
cable
connection, 3–3
host computer, 3–8
installation, 3–3
lengths, 1–2
routing, 3–3

Index—4–1

4–2