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March 1995

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Document:	StorageWorks Solutions BA346-K Series Deskside Expansion Pedestal User's Guide
Order Number:	EK-BA346-UG
Revision:	A01
Pages:	40
Original Filename:

OCR Text

Solutions
BA346–K Series
Deskside Expansion Pedestal
User’s Guide
Order Number EK–BA346–UG. A01
This guide describes the procedures for installing, configuring, and maintaining the BA346–K
series deskside expansion pedestal.

Digital Equipment Corporation
Maynard Massachusetts

March 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.
FCC ID: AO9-BA346
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 user's 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
All Rights Reserved.
Printed in the United States of America.
HSJ, StorageWorks, and the DIGITAL logo are trademarks of Digital Equipment Corporation.
This document was prepared using Microsoft Word for Windows 6.0®

Contents
Chapter 1 Introducing the Deskside Expansion Pedestal
1.1 Product Description.................................................................................................................... 1–1
1.2 Options ...................................................................................................................................... 1–2
1.3 Major Components..................................................................................................................... 1–3
1.4 Power......................................................................................................................................... 1–4
1.5 Device Cooling .......................................................................................................................... 1–6
1.6 StorageWorks Building Blocks (SBBs)....................................................................................... 1–7
1.7 Product Specifications................................................................................................................ 1–8

Chapter 2 Installing and Operating the Pedestal
2.1 Installing a Pedestal ................................................................................................................... 2–1
2.2 Selecting the Installation Area ................................................................................................... 2–2
2.3 Unpacking a Pedestal ................................................................................................................. 2–2
2.4 Packing a Pedestal ..................................................................................................................... 2–4
2.5 Preparing the Pedestal for Operation .......................................................................................... 2–5
2.6 Mounting the Base ..................................................................................................................... 2–5
2.7 Installing Options ...................................................................................................................... 2–6
2.8 Configuring the Pedestal ............................................................................................................ 2–6
2.9 Installing SBBs .......................................................................................................................... 2–7
2.10 Connecting the SCSI Bus Cables.............................................................................................. 2–8
2.11 Connecting the AC Power Cord ............................................................................................... 2–9
2.12 Operating the Pedestal ............................................................................................................2–10
2.13 Mounting the Door..................................................................................................................2–11
2.14 Replacing a Storage SBB ........................................................................................................2–12

Chapter 3 Configuring a Pedestal
3.1 The Standard Configuration....................................................................................................... 3–1
3.2 SCSI Bus Cables and Accessories............................................................................................... 3–2
3.3 SCSI Buses ................................................................................................................................ 3–3
3.4 Internal SCSI Buses ................................................................................................................... 3–4
3.5 Removing the Side Panel ........................................................................................................... 3–5
3.6 Setting the Configuration Address.............................................................................................. 3–6
3.7 Device Addresses ....................................................................................................................... 3–8
3.8 Completing the Configuration.................................................................................................... 3–8

Glossary
Index

iii

Figures
Figure 1–1 BA346–KB Deskside Expansion Pedestal...................................................................... 1–1
Figure 1–2 BA346 – Rear View ...................................................................................................... 1–4
Figure 1–3 DC Power Distribution .................................................................................................. 1–4
Figure 1–4 Pedestal Air Flow.......................................................................................................... 1–6
Figure 1–5 Typical 3.5–Inch SBB ................................................................................................... 1–7
Figure 2–1 Pedestal Dimensions ..................................................................................................... 2–1
Figure 2–2 Pedestal Packing ........................................................................................................... 2–3
Figure 2–3 Mounting the Base ........................................................................................................ 2–5
Figure 2–4 Standard BA346–KB Configuration .............................................................................. 2–6
Figure 2–5 3.5-Inch SBB ................................................................................................................ 2–7
Figure 2–6 Installing an SBB .......................................................................................................... 2–7
Figure 2–7 BN21K-Series Cable Connectors................................................................................... 2–8
Figure 2–8 BN21L-Series Cable Connectors ................................................................................... 2–8
Figure 2–9 Rear Panel Connectors .................................................................................................. 2–9
Figure 2–10 Power Supply Label..................................................................................................... 2–9
Figure 2–11 Pedestal Power On LED ............................................................................................ 2–10
Figure 2–12 Storage SBB Status LEDs.......................................................................................... 2–10
Figure 2–13 Mounting the Door.................................................................................................... 2–11
Figure 3–1 Standard (Shipping) Configuration ............................................................................... 3–1
Figure 3–2 SCSI Cables and Accessories......................................................................................... 3–2
Figure 3–3 BA346–KB SCSI Bus Lengths ...................................................................................... 3–4
Figure 3–4 Removing the Side Cover.............................................................................................. 3–5
Figure 3–5 Side Cover Hand Hold................................................................................................... 3–5
Figure 3–6 Address Configuration Jumpers.................................................................................... 3–6
Figure 3–7 BA346–KB Standard Configuration .............................................................................. 3–6

Tables
Table 1–1 Major BA346–K Series Pedestal Components................................................................ 1–3
Table 1–2 Power Supply Specifications........................................................................................... 1–4
Table 1–3 Recommended Country-Specific AC Power Cords.......................................................... 1–5
Table 1–4 BA346–KB Pedestal Specifications................................................................................. 1–8
Table 1–5 Air Flow......................................................................................................................... 1–8
Table 3–1 Standard Configuration Specifications............................................................................ 3–1
Table 3–2 SCSI Bus Accessories..................................................................................................... 3–2
Table 3–3 SCSI Buses and Cables................................................................................................... 3–3
Table 3–4 Determining SCSI Bus Lengths ...................................................................................... 3–4
Table 3–5 Standard Configuration Addresses and Slot Addresses.................................................... 3–7

Preface
The StorageWorks BA346–K Series Deskside Expansion Pedestal User’s Guide describes the
installation, configuration, and maintenance of this family of pedestal storage arrays.

Intended Audience
This guide is for use by individuals responsible for configuring, installing, and maintaining
pedestals.

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

This chapter is an introduction to the pedestal that includes product
description, features, StorageWorks building blocks, power, fans, and
product specifications.

Chapter 2

This chapter describes how to install a deskside pedestal and includes:

•
•
•
•
•
Chapter 3

Unpacking pedestals
Selecting the installation area
Selecting SCSI buses and cables
Connecting the pedestal to the SCSI controller
Installing the SBBs

This chapter contains the following pedestal configuration procedures:
• Connecting the internal SCSI bus Cabling
• Setting the configuration address
• Setting device addresses

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

Order Number

StorageWorks Solutions BA346–KB Deskside Expansion
Pedestal 5.25-Inch Device Installation Guide

EK–346AA–IG

StorageWorks Solutions BA346–KB Deskside Expansion
Pedestal Dual Bus Installation Guide

EK–346AB–IG

StorageWorks Solutions Configuration Guide

EK–BA350–CG

StorageWorks Solutions SBB User’s Guide

EK–SBB35–UG

Documentation Conventions
The documentation conventions in this guide are as follows:
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 publication titles. In the
glossary, italic type indicates cross-references.

1
Introducing the Deskside
Expansion Pedestal
This chapter is an introduction to the BA346–KB series deskside expansion pedestal,
commonly referred to as the “pedestal.” This description includes the options, components,
power and cooling requirements, StorageWorks building blocks (SBBs), and specifications.

1.1 Product Description
The standard BA346–KB deskside expansion
pedestal (pedestal) shown Figure 1–1 is an
enclosure for creating a user-defined storage array
using the small computer system interface (SCSI)
bus. The following are the features of this
pedestal:

•
•
•
•
•
•
•

Figure 1–1 BA346–KB Deskside Expansion
Pedestal

Single-ended, 8-bit or 16-bit, SCSI–2 bus
Capacity of seven, 3.5-inch SBBs
68-pin, high-density input and output
connectors
ac power supply (switch selectable input
50 to 60 Hz, 115 to 240 V ac)
Cooling fan
Jumper selectable SCSI address configurations
Active SCSI bus termination

To expand the number of devices on a 16-bit SCSI
bus you can interconnect the pedestals providing
you do not exceed the SCSI bus length limitations
listed in Chapter 3.

CXO-4552A-MC

Introducing the Deskside Expansion Pedestal 1–1

1.2 Options
You can install the following options in a pedestal either individually or in combination:
BA35X–AA 5.25-Inch Device Option Kit
This kit contains a modular carrier, the cables, and the mounting hardware for installing
either two half-height, or one full-height, 5.25-inch storage device in the top of the
pedestal. This option increases the total number of devices on a 16-bit bus to nine.
See StorageWorks Solutions BA346–KB Deskside Expansion Pedestal 5.25-Inch Device
Installation Guide for detailed information about installing and configuring this option.
BA35X–AB Dual-Bus Option Kit
With the cables and connectors in the dual bus option kit you can split the backplane bus
into two buses—a four device bus and a three device bus. When used in conjunction with
the 5.25-inch option kit, you can have a six device bus and a three device bus in the same
pedestal.
See StorageWorks Solutions BA346–KB Deskside Expansion Pedestal Dual Bus
Installation Guide for detailed information about installing and configuring this option.
BA35X-VB Stability Option Kit
This kit includes a base that improves the stability of the pedestal. The procedures for
installing the base are described in Section 2.6.
BA35X–YA Factory Configuration Option
When you select this option, the factory:

•
•
•
•
•
•
•

Sets the configuration addresses (jumpers W1-W3) as the user specifies.
Installs the SBBs in the slots the user specifies.
Sets the SCSI device addresses.
Installs the 5.25-inch modular carrier option and devices.
Installs the dual bus option.
Configures the internal SCSI bus.
Includes, but does not mount, the pedestal door.

1–2 Introducing the Deskside Expansion Pedestal

1.3 Major Components
The user is responsible for providing the following components, which are available through
your Digital account representative:

•
•
•

AC power cord with NEMA 15 connector (see Table 1–3)
Storage Devices—5.25-inch devices and 3.5-inch SBBs
SCSI cables (BN21K or BN21L)

Table 1–1 lists the major pedestal components supplied with the basic unit and each option.
Table 1–1 Major BA346–K Series Pedestal Components
Component
Base, Pedestal
Cable, Adapter (68-pin to 50-pin)
Cable, Input/Output
Cable, Input/Output, 5.25-inch device
Cable, Jumper
Door
Enclosure
Terminator

BA346–KB
0
0
1
0
1
1
1
1

BA35X–AA
0
1
0
1
0
0
0
0

BA35X–AB
0
0
3
0
0
0
0
1

BA35X–VB
1
0
0
0
0
0
0
0

Introducing the Deskside Expansion Pedestal 1–3

1.4 Power
The ac power supply (switch-selectable 115 V ac or 230 V ac input), is located in the rear of
the pedestal as shown in Figure 1–2. Figure 1–3 shows the internal dc power distribution,
Table 1–2 lists the power supply specifications, and Table 1–3 lists the country specific ac
power cords.
Table 1–2 Power Supply Specifications
Specification
Power
Nominal Output Voltages

Rating
200 W
+5 V dc @ 20 A
+12 V dc @ 8 A

Figure 1–2 BA346 – Rear View

Figure 1–3 DC Power Distribution

AC INPUT
SWITCH
AC INPUT
CONNECTOR
J10

J12

J11

J16

J13

J17

CXO-4479A-MC
CXO-4480A-MC

1–4 Introducing the Deskside Expansion Pedestal

Table 1–3 Recommended Country-Specific AC Power Cords

Country

Voltage

Amps

Connector Type

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

Plug Type
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

Length
M
Ft
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

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

Digital
Order No.
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

Introducing the Deskside Expansion Pedestal 1–5

1.5 Device Cooling
Proper device operation requires cooling. The two fans in the pedestal and in the power
supply.

•
•

The fan mounted on the rear of the pedestal cools the storage devices.
The power supply internal fan cools the 5.25-inch devices and the power supply.

As shown in Figure 1–4, both fans draw air through the front of the pedestal, through the
storage devices, and exhaust it out the rear.
CAUTION
Blocking or restricting the intake or output air flow can cause overheating.
Therefore, leave a clear space of at least 0.3 m (1 ft) in front and behind the
pedestal.
Figure 1–4 Pedestal Air Flow

CXO-4481A-MC

1–6 Introducing the Deskside Expansion Pedestal

1.6 StorageWorks Building Blocks (SBBs)
The pedestal supports only 3.5-inch form-factor storage devices in a modular carrier, an SBB
(see Figure 1–5). The StorageWorks Solutions Configuration Guide lists the pedestal
compatible 3.5–inch storage devices.
Figure 1–5 Typical 3.5–Inch SBB

CXO-4379A-MC

The following primary factors determine the compatible storage devices:

•
•
•
•

The SCSI controller must support all the storage devices.
The SCSI controller must support all the combinations of storage devices on the bus.
The pedestal does not support 5.25-inch SBBs.
The pedestal does support 5.25-inch devices mounted in the 5.25-inch modular carrier
option (BA35X–AA).

Introducing the Deskside Expansion Pedestal 1–7

1.7 Product Specifications
Table 1–4 lists the basic product specifications.
Table 1–4 BA346–KB Pedestal Specifications
Physical Specifications
Dimension
Height
533 mm
21 in
Width
203 mm
8 in
Depth
483 mm
19 in
Rear clearance (air exhaust)
305 mm
12 in
Front clearance (door opening)
305 mm
12 in
Weight (no devices)
17 kg
37 lb
Item

Power
Item
Total Power
Nominal Output Voltages
*

Device startup
Power available to 5.25-inch devices

Rating
200 W
+5 V dc @ 20 A
+12 V dc @ 8 A
4 second interval (minimum)
+5 V dc @ 20 A
+12 V dc @ 8 A

Table 1–5 lists the air flow through the pedestal under test conditions with the door open.
Table 1–5 Air Flow
Device
5.25-inch devices
3.5-inch devices
5.25-inch devices
3.5-inch devices
5.25-inch devices
3.5-inch devices
5.25-inch devices
3.5-inch devices

Qty
2
7
2
6
2
7
2
6

Slots
All filled

Measured at
Both 5.25-inch slots

Volume (CFM)
2.86

Slot 7 (bottom) empty

Both 5.25-inch slots

2.74

All filled

RZ28B in Slot 4

2.34

Slot 7 (bottom) empty

RZ28B in Slot 4

1.79

This is the time required before a storage device is ready to transfer data. For example, the time it takes a disk to spin
up, a tape drive to tension, and so forth.

1–8 Introducing the Deskside Expansion Pedestal

2
Installing and
Operating a Pedestal
This chapter describes the procedures for installing and operating a BA346–KB series
deskside expansion pedestal. Subjects addressed include selecting the installation area,
unpacking the pedestal, installing storage devices, connecting cables, and checking pedestal
operation

2.1 Installing a Pedestal
You can usually install the pedestal within 2 meters (6.6 feet) of the SCSI controller and next
to an ac receptacle. A desktop, a table, or the floor are acceptable installation locations
Figure 2–1 shows the minimum pedestal dimensions.
CAUTION
Blocking or restricting the input or output air flow can cause overheating.
Therefore, leave a clear space of at least 0.3 m (1 ft) at both the front and rear of
the pedestal.
Figure 2–1 Pedestal Dimensions
203 mm
(8 in)

533 mm
(21 in)

483 mm
(19 in)

AIR FLOW
305 MM
(12 in)

FRONT DOOR
203 mm
(10 in)
CXO-4553A-MC

Installing and Operating a Pedestal 2–1

2.2 Selecting the Installation Area
The location of the pedestal depends upon the availability of ac power and the distance to the
SCSI controller. SCSI bus length is critical to selecting the installation area. Therefore,
before selecting the installation area, read Section 3.3.
CAUTION
Blocking or restricting the input or output air flow can cause overheating.
Therefore, leave a clear space of at least 0.31 m (1 ft) at both the front and rear of
the pedestal.

2.3 Unpacking a Pedestal
The shipping containers provide maximum protection for the pedestal and all components.
Digital recommends that you unpack the pedestal in the installation.
WARNING
To prevent personal injury always use two people to pack, unpack, or move the
pedestal in the shipping container.
Refer to Figure 2–2 and complete the following procedure to unpack a pedestal:
1.

Orient the shipping container as shown.

Open the shipping container. Slide the pedestal and the packing material on to the floor .

Remove the documentation package.

Remove the top foam blocks.

Remove the door.

Remove the pedestal.

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 pedestals without the proper
packing materials can cause damage to the pedestal.

`2–2 Installing and Operating a Pedestal

Figure 2–2 Pedestal Packing
FOAM
BLOCK

USER
DOCUMENTATION

DOOR WITH
SHIPPING
SLEEVE

BA346-KB

SHIPPING
CARTON

CXO-4633A-MC

Installing and Operating a Pedestal 2–3

2.4 Packing a Pedestal
WARNING
To prevent personal injury always use two people to pack, unpack, or move the
pedestal in the shipping container.
Complete the following procedures to pack a pedestal for shipping:
CAUTION
To prevent damage to the pedestal, you must use the approved packing materials
and pack the pedestal as described in this procedure
1.

Place the components in the plastic bags.

Remove the packing material from the shipping container.

Open the shipping container and orient it as shown in Figure 2–2.

Remove the door and all external cables from the pedestal.

Place the two bottom foam blocks on the shipping container .lid

Insert the pedestal in the bottom foam blocks.

Insert the door into its shipping sleeve.

Insert the door into the foam blocks.

Place the top foam blocks on top of the pedestal and door.

10. Place the cardboard tray on top of the foam block.
11. Slide the pedestal and shipping materials into the carton.
12. Seal the carton.

`2–4 Installing and Operating a Pedestal

2.5 Preparing the Pedestal for Operation
Preparing the pedestal for operation involves the following procedures:

•
•
•
•
•
•
•

Mounting the base (BA35X–VB option)
Installing options (BA35X–AA, BA35X–AB)
Configuring the pedestal (optional)
Installing the storage devices
Connecting the power and SCSI bus cables
Checking the pedestal and its components for proper operation
Mounting the door

2.6 Mounting the Base
Complete the following procedure to mount the base (BA35X–VB option):
1.

Place the pedestal on its top.

Align the base with bottom of the pedestal (see Figure 2–3).

Install the four, hex-head 6-32 screws through the base into the pedestal.

Set the pedestal on the base and continue the installation process.

Figure 2–3 Mounting the Base

BASE

PEDESTAL
(BOTTOM)

CXO-4632A-MC

Installing and Operating a Pedestal 2–5

2.7 Installing Options
Complete the procedures described in the individual option installation guides.

2.8 Configuring the Pedestal
The pedestal is factory-configured as a single SCSI bus with the device addresses shown in
Figure 2–4. You can use the procedures in Chapter 3 to change the configuration.
Figure 2–4 Standard BA346–KB Configuration

J10
SCSI ADDRESS 0
INPUT
CABLE

SCSI ADDRESS 1

SCSI ADDRESS 2

STANDARD
CONFIGURATION

J11

SCSI ADDRESS 3

J16

SCSI ADDRESS 4

JUMPER
CABLE

IN
J18

SCSI ADDRESS 5

OUT
W1 W2 W3
TERMINATOR

SCSI ADDRESS 6
J17

CXO-4550A-MC

`2–6 Installing and Operating a Pedestal

2.9 Installing SBBs
After installing the options and configuring the pedestal, you can install the SBBs. Be sure
that you have set the storage device addresses before installing the devices in the pedestal.
The combinations of the SBB guides, shelf slots, and backplane connectors preclude installing
an SBB incorrectly; you can insert an SBB only one way. Each 3.5-inch SBB occupies one
shelf slot.
When you insert an SBB into a shelf and fully seat it, the two tabs on the front panel expand
and engage the shelf, thereby securely mounting the SBB. To remove the SBB, press and hold
the two mounting tabs in and pull the device out of the shelf.
Figure 2–5 3.5-Inch SBB

Figure 2–6 Installing an SBB

CXO-4379A-MC

CXO-4484A-MC

Installing and Operating a Pedestal 2–7

2.10 Connecting the SCSI Bus Cables
Once you have installed all the storage devices, you can connect the SCSI bus cable.
CAUTION
Connecting the SCSI bus cable with power applied to either the controller or the
pedestal can generate erroneous signals and cause the SCSI bus to “hang.”
Always turn off the power on both the host and the pedestal when connecting or
disconnecting the SCSI cables.
The cables recommended for connecting the SCSI controller are either a BN21K or BN21L
series SCSI cable. The 68-pin, high-density connector (see Figure 2–7) connects to the SCSI
“Bus A” input connector on the rear panel of the pedestal (see Figure 2–9).
Figure 2–7 BN21K-Series Cable Connectors

CXO-4171A-MC_R

Figure 2–8 BN21L-Series Cable Connectors

CXO-4172A-MC_R

`2–8 Installing and Operating a Pedestal

Figure 2–9 Rear Panel Connectors

INPUT
CONNECTORS

OUTPUT
CONNECTORS

BUS "A"
BUS "AB"
BUS "A"

BUS "B"
BUS "A"
BUS "AB"
BUS "B"
CXO-4557A-MC

2.11 Connecting the AC Power Cord
Complete the following steps to connect the ac power cord:
1.

Read the label covering the ac input connector.

Remove the label.

Set the ac input selector switch to the correct operating voltage (115 V ac or 230 V ac).

Connect the ac power cord to the pedestal connector.

Connect the ac power cord to the wall receptacle.

Figure 2–10 Power Supply Label

V~100-200 V~220-240

3617905-17

CXO-4551A-MC

Installing and Operating a Pedestal 2–9

2.12 Operating the Pedestal
Use the pedestal power switch, a “push-to-make, push-to-break” type, to turn on the pedestal.
The pedestal power switch is shown in Figure 2–11.
When the ac power is on the green pedestal power LED is on (see Figure 2–11).
When the SCSI bus is active the LEDs on the 5.25-inch devices and the SBBs indicate the
status of the storage devices.
For a detailed description of the SBB status LEDs, please refer to the SBB User’s Guide.
The individual 5.25-inch device users guides describes the function and purpose of the status
LEDs.
Figure 2–11 Pedestal Power On LED

POWER ON
LED

POWER ON
SWITCH
CXO-4549A-MC

As shown in Figure 2–12, the SBBs have two status LEDs—a green activity LED and an
amber fault LED.
Usually the green activity LED is flashing and the amber fault LED is off.
When there is a storage device SBB error indication, complete the procedures in Section 2.14.
Figure 2–12 Storage SBB Status LEDs

ACTIVITY LED
(GREEN)
FAULT LED
(AMBER)

CXO-4378A-MC

`2–10 Installing and Operating a Pedestal

2.13 Mounting the Door
Once the pedestal is operating you can install the door to provide security for the storage
devices. (A locked door precludes removing storage devices.) Figure 2–13 shows how to
mount the door by inserting the hinge pins on the door into the holes in the bezel.
Figure 2–13 Mounting the Door

HINGE
PIN
(2)
CXO-4554A-MC

Installing and Operating a Pedestal 2–11

2.14 Replacing a Storage SBB
There are three methods for replacing a storage SBB with an identical SBB:

•

Hot swap —This method requires that the SCSI controller support removing and
installing SBBs while the bus is active, Check the controller documentation to determine
if hot swap is supported.
CAUTION
The capabilities of the SCSI controller determine the procedure for removing or
installing SBBs. 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.

•
•

Warm swap—This method requires a that the SCSI controller makes one bus inactive
(quiescent) while the other buses remain active. HSJ40-series controllers have this
capability.
Cold swap—This method requires removing power from the pedestal to deactivate the
bus.

Refer to Figure 2–6 and complete the following procedures to replace an SBB.
1.

Open the front door.

When the bus is inactive, press the mounting tabs on the SBB bezel together and pull the
SBB out, as shown in Figure 2–6.

Insert an identical model SBB in the slot and push it in to fully seat it. Allow the front
panel mounting tabs expand and engage the shelf.

Activate the SCSI bus and observe that the SBB status LEDs are operating.

Close the front door.

`2–12 Installing and Operating a Pedestal

3
Configuring the Pedestal
This chapter describes the standard BA346–KB pedestal configuration and how to change it.

3.1 The Standard Configuration
You can install the dual bus and the 5.25-inch device option at any time. Installing either
option requires changing the pedestal configuration. Digital recommends that you install the
options during the initial installation. See the individual option installation guides for
detailed option installation procedures.
The standard configuration shown in Figure 3–1 and described in and is factory-installed.
Figure 3–1 Standard (Shipping) Configuration

J10
SCSI ADDRESS 0
INPUT
CABLE

SCSI ADDRESS 1

SCSI ADDRESS 2

STANDARD
CONFIGURATION

J11

SCSI ADDRESS 3

J16

SCSI ADDRESS 4

JUMPER
CABLE

IN
J18

SCSI ADDRESS 5

OUT
W1 W2 W3
TERMINATOR

SCSI ADDRESS 6
J17

CXO-4550A-MC

Table 3–1 Standard Configuration Specifications
Backplane Bus Type
Device Addresses

SCSI Bus

Internal SCSI Bus Length

Single
8-bit devices:
0-6
16-bit devices:
0-6
5.25-inch devices:
None
Cables and Terminators:
• Input Cable (Rear panel to J10)
• Jumper Cable (J11 to J16)
• Terminator (J17)
0.97 meters (38 in)

Configuring the Pedestal 3–1

3.2 SCSI Bus Cables and Accessories
After installing the options, there are two parts to configuring a pedestal—connecting the
internal cables and setting the configuration address. Most cabling configurations and all
SCSI address configurations are compatible. However, be sure to check Table 3–5 (page 3–7)
for a description of each configuration.
As shown in Table 3–2 and Figure 3–2, the SCSI bus accessories include a terminator and
cables.
Table 3–2 SCSI Bus Accessories

Item
Cable, Adapter, 68-pin to 50-pin
Cable, Input 5.25-inch device
Cable, Input/Output
Cable, Jumper
Terminator

BA346–KB
(Standard)
0
0
1
1
1

Quantity per Model
BA35X-AA
BA35X -AB
5.25-Inch Option
Dual Bus Option
2
0
1
0
0
3
0
0
0
1

Figure 3–2 SCSI Cables and Accessories
5.25 DEVICE INPUT CABLE

JUMPER
CABLE

INPUT/OUTPUT CABLE

ADAPTER
CABLE

TERMINATOR

68 PIN

50 PIN

CXO-4426A-MC

3–2 Configuring the Pedestal

3.3 SCSI Buses
The reliability of data transfers on a SCSI bus is a function of the following:

•
•
•
•

The bus transmission rate
The bus type (8-bit or 16-bit)
The maximum SCSI bus length (a function of the bus type, the transmission rate, and the
use of SCSI bus converters)
The total length of the SCSI bus (as measured from the host bus terminator to the pedestal
terminator)

Table 3–3 lists the maximum SCSI bus lengths and the recommended SCSI bus cables.
Table 3–3 SCSI Buses and Cables
Bus Type
Controller
Width Type Termination
8-bit
Fast
Differential

Transfer Rate
MT/s
10

†

Bus Length

MB/s
10

Meters
25

Feet
82

8-bit

Fast

Single-ended

9.8

8-bit

Slow

Single-ended

19.7

16-bit

Fast

Differential

16-bit

Fast

Single-ended

9.8

‡

Recommended Cable
Order
Number
Meters
Feet
BN21K–23
23
82
BN21L–23
BN21K–02
2
6.6
BN21L–02
BN21K–05
5
16
BN21L–05
BN21K–23
23
82
BN21L–23
BN21K–02
2
6.6
BN21L–02

Note
MT/s (megatransfers per second) is the repetitive rate at which words of data are
transferred across a bus. The number of megabytes per second (MB/s) is
determined by the bus width (8-, 16-, or 32-bit) and the number of bytes per word
(1, 2, or 4, respectively).

†
‡

Megatransfers per second
BA346–DB deskside expansion pedestal.

Configuring the Pedestal 3–3

3.4 Internal SCSI Buses
Figure 3–3 shows the three internal SCSI bus configurations. Digital recommends that the
internal SCSI bus length be kept as short as possible.
The total internal SCSI bus cable length is distance from the controller terminator to the
pedestal terminator. To calculate this distance, add the following elements:

•
•
•

The distance from the controller terminator to the controller output connector
The pedestal input cable length (rear panel to connector J10)
The pedestal backplane SCSI bus length (either “A,” “B,” or “AB”) from either J10 or
J16 to the terminator (see Table 3–4).

Table 3–4 Determining SCSI Bus Lengths

SCSI Bus Element
Bus
Upper Backplane
A
Lower Backplane
B
Backplane
AB
Cable, Input/Output
Cable, Jumper
Output Cable
BA35X–AA 5.25-Inch Device Option Kit
Cable, Input 5.25-inch device
Cable, Adapter, 68-pin to 50-pin

Figure 3–3 BA346–KB SCSI Bus Lengths

BA346-AA
OPTION

J10
SCSI ADDRESS 0

SCSI ADDRESS 1

SCSI ADDRESS 2
BUS
"AB"

J11

SCSI ADDRESS 3

J16

SCSI ADDRESS 4

SCSI ADDRESS 5

BUS
"B"

SCSI ADDRESS 6
J17

CXO-4477A-MC

3–4 Configuring the Pedestal

To
J11
J17
J17

Length
Meters
Inches
0.41
16.0
0.25
10.0
0.73
28.8
0.30
12.0
0.07
2.8
0.30
12.0
0.64
0.05

25.0
2.0

CAUTION
The recommended cable lengths are when the total
internal SCSI is less than 1 meter (39 inches) for both
the controller and pedestal.
If the total internal bus length exceed 1 meter (see
Section 3.4), you must use a shorter cable for proper
SCSI bus operation.

BUS
"A"

From
J10
J16
J10

3.5 Removing the Side Panel
Whenever you configure the pedestal, you must complete the following procedures:
1.

Turn off the power to both the controller and the pedestal.

Disconnect the pedestal power cord.

Disconnect the external SCSI bus cables.

Remove the front door by lifting it up and off the bezel.

Remove the left side cover screws (see Figure 3–4).

Grasp the side cover rear hand hold (see Figure 3–5) and pull the cover to the rear and
remove.

Figure 3–4 Removing the Side Cover

Figure 3–5 Side Cover Hand Hold

HAND
HOLD

E
COVER
SCREW
CXO-4435A-MC

CXO-4556A-MC

Configuring the Pedestal 3–5

3.6 Setting the Configuration Address
There are both configuration addresses and device addresses. Jumpers W1-W3 determine the
eight configuration addresses that can be used for both 8-bit (addresses 0-6) and 16-bit
(addresses 0-6 and 8-14) devices.
Note
SCSI device address 7 is the SCSI controller address.
Use jumpers W1-W3 to set the address configurations. Figure 3–6 shows the location of
connector J18 and the jumpers. Table 3–5 defines the slot addresses assigned for each of the
eight address configurations. Figure 3–7 shows the standard configuration cabling.
Figure 3–6 Address Configuration Jumpers

J14
J9
J18
W3
W2
W1

J17

CXO-4476A-MC

Figure 3–7 BA346–KB Standard Configuration

J10
SCSI ADDRESS 0
INPUT
CABLE

SCSI ADDRESS 1

SCSI ADDRESS 2

STANDARD
CONFIGURATION

J11

SCSI ADDRESS 3

J16

SCSI ADDRESS 4

JUMPER
CABLE

IN
J18

SCSI ADDRESS 5

OUT
W1 W2 W3
TERMINATOR

SCSI ADDRESS 6
J17

CXO-4550A-MC

3–6 Configuring the Pedestal

Table 3–5 Standard Configuration Addresses and Slot Addresses
Configuration 1 
(Dual Bus only)

W
1

W
2

SCSI Addresses

Slot 0
Address 0

1
1

2
2

3
3

4
0

5
1

6
2

W
3

SCSI Addresses
  
Slot 0 1 2 3 4 5 6

Configuration 2
Standard
Configuration

Address 0
W
1

W
2

1 2 3 4
9 10 11 0

5
1

6
2

5
5

6
6

W
3

SCSI Addresses
  
Slot 0

Configuration 3

Address 8
W
1

Configuration 4

W
2

W
3

SCSI Addresses
  
Slot 0 1 2
Address 8
W
1

W
2

3
9 10 11

4
4

W
3

SCSI Addresses
  
Slot 0 1 2 3 4 5 6

Configuration 5

W
1

W
2

Address 0

Configuration 6

9 10

SCSI Addresses
  
Slot 0 1 2 3 4
Address 0
W
1

W
2

SCSI Addresses
  
Slot 0 1
Address 8
W
1

W
2

5 6
3 12 13 14

W
3

Configuration 7 
(Dual Bus only)

Configuration 8

W
3

2 3 4
9 10 11 8

5 6
9 10

W
3

SCSI Addresses
  
Slot 0 1 2 3 4 5
Address 8
W
1

W
2

6
9 10 11 12 13 14

W
3

LEGEND:

16-bit devices only.

Configuring the Pedestal 3–7

3.7 Device Addresses
You can assign the device SCSI bus addresses in the following ways:

•
•
•

Jumpers on the device
Device address switches on 8-bit removable media SBBs as described in the SBB User’s
Guide
Using the slot connector address as determined by the jumpers (see Section 3.6)

The basic rules for setting devices are:

•
•
•

16-bit devices always use the slot address
8-bit, 5.25-inch devices always use the internal jumpers
8-bit, 3.5-inch SBB disk drives always use the slot address

The following are options for an 8-bit removable media SBB with an address switch (refer to
the SBB User’s Guide).

•
•

To use the slot address set the device address switch to the default setting.
Duplicate device addresses on a single, 8-bit SCSI bus require you to set the device
address switch to an unused 8-bit device address.

3.8 Completing the Configuration
Perform the following procedure to complete the configuration and check the pedestal
operation.
1.

Replace the side cover.
CAUTION
Install the side cover before turning the power on.

Install the SBBs in the lower portion of the pedestal.

Connect the external SCSI cable and the ac power cord.

Turn on the pedestal and check that the pedestal is operating properly and that the devices
respond when the SCSI bus is active.

3–8 Configuring the Pedestal

Glossary
cold swap
A method of device replacement that requires that power be removed from all shelves in a
cabinet. Use this method when you cannot use warm swap or hot swap methods.
See also warm-swap and hot-swap.
controller
A hardware and 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.
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.
host computer
Commonly referred to as the host, this is the primary or controlling computer for the storage
subsystem.
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.
megabytes per second (MB/s)
See megatransfers per second.
megatransfers per second (MT/s)
The repetitive rate at which words of data are transferred across a bus. The number of
megabytes per second (MB/s) is determined the bus width (8-, 16-, or 32-bit). For example, a
5 MT/s transfer rate is the equivalent of:
Bus Width
Word Size

8-bit
1 Byte

16-bit
2 Bytes

32-bit
4 Bytes

5 MT/s =

5 MB/s

10 MB/s

20 MB/s

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.
pedestal
An enclosure, commonly referred to as a pedestal, that houses a StorageWorks shelf in a
vertical position. This pedestal contains the power supply and a cooling fan. The user
supplies the storage SBBs and an ac power cord. The SBB types and the SCSI controller
determine the number of devices, the SCSI buses supported, and the pedestal location.

Glossary–1

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.
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.
SCSI address
The decimal representation of the unique address assigned to a SCSI device, for example,
SCSI address 6.
SCSI id
The bit-significant representation of the unique address assigned to a SCSI device, for
example, SCSI id 011.
single-ended SCSI bus
A bus in which the voltage of a single wire in relation to ground determines each signal's logic
level.
small computer system interface
See SCSI.
split bus
Configuring a single SBB shelf SCSI bus as two individual buses (a four device bus and a
three device bus) creates a split bus.
spin-down
Removing power and halting data transfer starts the spin-down process. When the device is
no longer rotating and you can move the device, the spin-down is complete. In the case of
disk drives, the heads are retract and the media stops rotating.
spin-up
Applying power initiates the spin-up process. When the device is operational and ready for
data transfer operations spin-up is complete.
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 supplies, 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.
target id
See SCSI id.
warm swap
Adding, removing, or replacing devices while the system remains operational is a controller
function. It is necessary to halt all activity on the device's SCSI bus for the duration of the
warm swap operation.
See also cold-swap and hot-swap.

2 –Glossary

word
This term indicates the size of a data construct. The bus width determines the number of bytes
in a word, for example:
Bus Width
Word Length
8-bit
1 byte
16-bit
2 bytes
32-bit
4 bytes

Glossary–3

Index
SCSI cable, 2–8

—5—
5.25-inch device option, 1–
2

—A—
Addresses
16-bit devices, 3–8
8-bit devices, 3–8
configuration, 3–2
configuration jumpers,
3–6
device, 3–2, 3–6, 3–8
duplicate device
addresses, 3–8
jumpers, 3–8
slot, 3–6
Air flow, 1–6, 1–8, 2–1, 2–
2
specifications, 1–8
Audience, v

—B—
BA346–KB, 1–1, 3–2
components, 1–3
factory configuration, 2–
6
shipping configuration,
2–6
standard configuration,
2–6
BA35X–AA, 1–2, 1–7, 3–2
installing, 2–5
BA35X–AB, 1–2
installing, 2–5
BA35X–VB, 1–2
mounting, 2–5
BA35X–YA, 1–2
Base, 1–2
mounting, 2–5
BN21K, 2–8
BN21L

—I—
—C—
Cables
BN21K cable, 2–8
BN21L, 2–8
connecting, 2–5
connecting SCSI bus, 2–
8
power, 2–5
SCSI bus, 2–5
SCSI bus BN21K, 2–8
SCSI bus BN21L, 2–8
SCSI bus input/output,
3–1
SCSI bus jumper, 3–1
CAUTIONs, 1–6, 2–1, 2–2,
2–4, 2–8, 2–12, 3–8
Cold swap, 2–12
Configuration address
jumpers, 3–6
Configuring, 2–5, 2–6
Connector
68-pin, 2–8
high-density, 2–8
Cooling, 1–6
fans, 1–6
power supply, 1–6
storage devices, 1–6

Input voltage, 2–9
Installing a pedestal, 2–1

—L—
LEDs
5.25-inch device status,
2–10
amber, 2–10
device activity, 2–10
fault, 2–10
green, 2–10
power, 2–10
SBB status, 2–10
status, 2–10

—O—
Operating a pedestal, 2–1
Options, 3–2
5.25-inch device, 1–2, 3–
1
base, 1–2
dual bus, 1–2, 3–1
factory configuration, 1–
2
installing, 2–5, 2–6, 3–2
stability, 1–2

—D—

—P—

Device addresses. See SCSI
bus
Door
lock, 2–11
mounting, 2–5, 2–11

Packing, 2–4
Pedestal, 1–1
assembling, 2–1
changing configuration,
3–1
configuration addresses,
3–2
configuring, 2–5, 2–6, 3–
1, 3–5
deskside expansion, 1–1
dimensions, 2–1

—H—
Hot swap, 2–12

Index—1

factory configuration, 2–
6, 3–1
installation, 3–8
installation area, 2–2
installing, 2–1
location, 2–1
operating, 2–1, 2–5
operation, 2–5, 3–8
packing, 2–4
power LED, 2–10
power switch, 2–10
shipping, 2–2
shipping configuration,
3–1
slot addresses, 2–7
slots, 2–7
standard configuration,
3–1
status LEDs, 2–10
unpacking, 2–2
Power, 1–4
ac input, 1–4, 2–2
ac power cords, 1–5
ac power supply, 1–4
ac power supply
specifications, 1–4
connecting, 2–9
cord, 2–9
input voltage, 2–9
switch, 2–10

—S—
SBBs, 1–7
3.5 inch slots, 2–7
5.25-inch, 1–7
installing, 2–5, 2–7
protecting, 2–11
replacing, 2–12
status, 2–10
storage device status, 2–
10
SCSI

2 – Index

bus, 2–6
device addresses, 3–2
SCSI bus
16-bit, 3–3
8-bit, 3–3
accessories, 3–2
active, 2–12
BN21K cables, 3–3
BN21L cables, 3–3
cables, 2–8, 3–2, 3–3
calculating internal bus
length, 3–4
controller, 3–3
controller termination, 3–
3
device address jumpers,
3–8
device address switches,
3–8
device addresses, 2–6, 2–
7, 3–8
differential, 3–3
fast, 3–3
inactive, 2–12
input/output cables, 3–1
internal, 3–4
internal bus "A", 3–4
internal bus "AB", 3–4
internal bus "B", 3–4
internal cables, 3–2
length, 2–2
maximum length, 3–3
megabytes/second, 3–3
megatransfers/second, 3–
3
quiescent, 2–12
single-ended, 3–3
slow, 3–3
terminator, 3–2
terminators, 3–1
total length, 3–3
transmission rate, 3–3

type, 3–3
SCSI bus "A", 2–8
SCSI controller, 1–7, 2–2
support, 1–7
swapping SBBs, 2–12
Side panel
removing, 3–5
Specifications
ac power, 1–4
air flow, 1–8
BA346–KB, 1–8
backplane bus type, 3–1
device addresses, 3–1
dimensions, 1–8
internal SCSI bus length,
3–1
physical, 1–8
power, 1–8
product, 1–8
single bus, 3–1
standard configuration,
3–1
Standard configuration, 2–6
Storage devices
3.5-inch, 1–7
installing, 2–5
StorageWorks building
blocks. See SBBs
Swapping SBBs, 2–12
cold swap, 2–12
hot swap, 2–12
SCSI controller, 2–12
warm swap, 2–12

—U—
Unpacking, 2–2

—W—
Warm swap, 2–12
WARNINGs, 2–2, 2–4