Compaq RAID ARRAY 3000 User Manual

Compaq StorageWorks

™

RAID Array 3000 Pedestal Storage
Subsystem Hardware

Users Guide

Third Edition (January 2001)
Part Number EK-SMCPO-UG. C01

Compaq Computer Corporation

© 2001 Compaq Computer Corporation.

COMPAQ, the Compaq logo and StorageWorks Registered with the U.S. Patent and
Trademark Office.

Microsoft, MS-DOS, Windows, and Windows NT are trademarks of Microsoft Corporation.

All other product names mentioned herein may be trademarks of their respective companies.

Confidential computer software. Valid license from Compaq required for possession, use or
copying. Consistent with FAR 12.211 and 12.212, Commercial Computer Software,
Computer Software Documentation, and Technical Data for Commercial Items are licensed to
the U.S. Government under vendor's standard commercial license.

Compaq shall not be liable for technical or editorial errors or omissions contained herein. The
information in this document is subject to change without notice.

THE INFORMATION IN THIS PUBLICATION IS PROVIDED “AS IS” WITHOUT
WARRANTY OF ANY KIND. THE ENTIRE RISK ARISING OUT OF THE USE OF THIS
INFORMATION REMAINS WITH RECIPIENT. IN NO EVENT SHALL COMPAQ BE
LIABLE FOR ANY DIRECT, CONSEQUENTIAL, INCIDENTAL, SPECIAL, PUNITIVE
OR OTHER DAMAGES WHATSOEVER (INCLUDING WITHOUT LIMITATION,
DAMAGES FOR LOSS OF BUSINESS PROFITS, BUSINESS INTERRUPTION OR LOSS
OF BUSINESS INFORMATION), EVEN IF COMPAQ HAS BEEN ADVISED OF THE
POSSIBILITY OF SUCH DAMAGES AND WHETHER IN AN ACTION OF CONTRACT
OR TORT, INCLUDING NEGLIGENCE.

The limited warranties for Compaq products are exclusively set forth in the
documentation accompanying such products. Nothing herein should be construed as
constituting a further or additional warranty.

RAID Array 3000 Pedestal Storage Subsystem Hardware User's Guide
Third Edition (January 2001)
Part Number EK-SMCPO-UG. C01

Contents

About This Guide

Purpose and Scope.......................................................................................................ix

Intended Audience .......................................................................................................ix

Document Structure .....................................................................................................ix

Related Documents ......................................................................................................xi

Text Conventions........................................................................................................xii

Symbols in Text ........................................................................................................ xiii

Symbols on Equipment............................................................................................. xiii

Rack Stability.............................................................................................................. xv

Getting Help................................................................................................................ xv

Compaq Technical Support ................................................................................. xv

Compaq Website.................................................................................................xvi

Compaq Authorized Reseller .............................................................................xvi

Chapter 1

Product Overview

Product Description .................................................................................................. 1-1

Pedestal Features....................................................................................................... 1-4

Pedestal Cabinet........................................................................................................ 1-5

Pedestal Components................................................................................................ 1-7

StorageWorks Building Blocks (SBBs) ............................................................ 1-7

RAID Array Controller...................................................................................... 1-7

Pedestal Power Supplies.................................................................................... 1-8

UPS.................................................................................................................... 1-8

Environmental Monitor Unit (EMU)................................................................. 1-9

UltraSCSI Buses .............................................................................................. 1-11

Connecting the Pedestal to a Host System ............................................................. 1-14

Specifications.......................................................................................................... 1-19

iv RAID Array 3000 Pedestal Storage Subsystem Hardware User's Guide

Chapter 2

RAID Array Controller

Controller Overview ..................................................................................................2-1

Controller Features ....................................................................................................2-3

Controller Reset and LED Indicators ........................................................................2-8

Flexible RAID Set Configuration..............................................................................2-9

Performance Enhancements ....................................................................................2-10

Custom Components ........................................................................................2-10

Efficient Write and Read Algorithms...............................................................2-11

RAID Levels Supported ..........................................................................................2-13

RAID 0 .............................................................................................................2-14

RAID 1 .............................................................................................................2-16

RAID 0+1 .........................................................................................................2-16

RAID 4 .............................................................................................................2-18

RAID 5 .............................................................................................................2-19

Just a Bunch of Drives (JBOD)........................................................................2-21

Redundant Operation...............................................................................................2-21

Initialization......................................................................................................2-21

Message Passing...............................................................................................2-22

Failover.............................................................................................................2-22

Environmental..........................................................................................................2-22

Backup Power Management.............................................................................2-22

Voltage Monitoring ..........................................................................................2-24

Temperature Monitoring ..................................................................................2-26

Chapter 3

Maintenance

Pedestal Status and Power LEDs...............................................................................3-2

SBB Status LEDs.......................................................................................................3-3

Controller LEDs.........................................................................................................3-4

EMU Error Reporting................................................................................................3-5

EMU Error Conditions .......................................................................................3-6

Replacing Components (FRUs).................................................................................3-7

Removing the Pedestal Door..............................................................................3-8

Replacing an SBB ..............................................................................................3-9

Replacing a Power Supply ...............................................................................3-10

Replacing the RAID Array Controller .............................................................3-12

Replacing the EMU Board ...............................................................................3-13

Replacing the UPS............................................................................................3-15

Differential/Wide UltraSCSI Bus............................................................................3-15

Reconfiguring the SCSI Bus ............................................................................3-16

Replacing the Controller Memory Cache Modules.................................................3-20

Contents v

Chapter 4

Expansion Pedestal Option

Product Description .................................................................................................. 4-1

Expansion Pedestal Cabinet...................................................................................... 4-2

Expansion Pedestal Components.............................................................................. 4-4

Reconfiguring Base Pedestal UltraSCSI Bus ........................................................... 4-6

Chapter 5

Second Controller Option

Second Controller Option Kit................................................................................... 5-2

Installing the Upgrade............................................................................................... 5-3

Saving Existing Configuration .......................................................................... 5-3

Updating Firmware............................................................................................ 5-4

Shutting Down the RA3000 .............................................................................. 5-6

Installing Two SIMMs into Second Controller................................................. 5-7

Replacing Existing Controller ........................................................................... 5-8

Restoring the Configuration .............................................................................. 5-9

Updating Firmware on Second Controller ...................................................... 5-10

Installing Original Controller .......................................................................... 5-11

Configuring a Dual Controller Installation for a Single Serial Port....................... 5-11

Configuring the RA3000 for the Active Mode of Operation .......................... 5-12

Configuring the Dual Controllers.................................................................... 5-13

Connecting to Your Dual Controller Storage System ..................................... 5-14

Verifying the Controller Operating Parameters .............................................. 5-15

List of Figures

Figure 1-1. RAID Array 3000 pedestal enclosure (drives optional) ....................... 1-2

Figure 1-2. Pedestal front panel major components ................................................ 1-6

Figure 1-3. Pedestal rear panel power supplies ....................................................... 1-6

Figure 1-4. EMU circuit board location ................................................................ 1-10

Figure 1-5. Pedestal rear panel components.......................................................... 1-11

Figure 1-6. UltraSCSI bus port and default SCSI ID assignments........................ 1-12

Figure 1-7. UltraSCSI bus configuration switch ................................................... 1-13

Figure 1-8. Slot locations and SCSI ID addresses................................................. 1-13

Figure 1-9. Single host, single adapter cabling diagram ....................................... 1-15

Figure 1-10. Single host, dual adapter/dual controller cabling diagram ............... 1-16

Figure 1-11. Single host, single adapter/dual controller (y-cable

connection) cabling diagram ........................................................... 1-17

Figure 1-12. Dual host, single adapter/single controller cabling diagram ............ 1-18

Figure 2-1. Bridging the gap between the host and the pedestal............................. 2-3

Figure 2-2. Units created from storagesets, partitions, and disk drives .................. 2-4

Figure 2-3. Controller front panel............................................................................ 2-9

vi RAID Array 3000 Pedestal Storage Subsystem Hardware User's Guide

Figure 2-4. RAID 0 write .......................................................................................2-15

Figure 2-5. Diagram of a RAID 1 write .................................................................2-16

Figure 2-6. Diagram of RAID 0+1 write................................................................2-17

Figure 2-7. Diagram of a RAID 4 write .................................................................2-18

Figure 2-8. Diagram of a RAID 5 write .................................................................2-20

Figure 3-1. Pedestal status LEDs..............................................................................3-3

Figure 3-2. Disk drive status LEDs ..........................................................................3-4

Figure 3-3. Removing pedestal door ........................................................................3-8

Figure 3-4. Replacing an SBB................................................................................3-10

Figure 3-5. Replacing a power supply....................................................................3-11

Figure 3-6. Removing the controller from the pedestal .........................................3-12

Figure 3-7. Remove standoffs from UPS and external fault connectors................3-14

Figure 3-8. Remove screw and panel .....................................................................3-18

Figure 3-9. Location of SCSI bus configuration switch.........................................3-19

Figure 3-10. Configuration switch .........................................................................3-19

Figure 3-11. Remove controller..............................................................................3-20

Figure 3-12. Release locking clips .........................................................................3-21

Figure 13. Remove installed SIMM modules.........................................................3-21

Figure 3-14. Install replacement SIMM .................................................................3-22

Figure 3-15. Pivot SIMM down to secure ..............................................................3-23

Figure 4-1. Expansion pedestal ................................................................................4-2

Figure 4-2. Expansion pedestal slot locations and ID addresses..............................4-3

Figure 4-3. Rear panel power supplies .....................................................................4-4

Figure 4-4. EMU circuit board location ...................................................................4-5

Figure 4-5. Remove side cover from base pedestal..................................................4-7

Figure 4-6. Remove SCSI bus terminator ................................................................4-7

Figure 4-7. Disconnect SCSI cable ..........................................................................4-8

Figure 4-8. Connect SCSI jumper ............................................................................4-9

Figure 4-9. Remove connector knockout plate.......................................................4-10

Figure 4-10. Connect SCSI cable ...........................................................................4-11

Figure 4-11. Set configuration switch to 7 .............................................................4-12

Figure 4-12. Configuration switch .........................................................................4-12

Figure 4-13. Reconfigured SCSI bus addresses .....................................................4-13

Figure 4-14. Connect SCSI cable between pedestals .............................................4-14

Figure 4-15. Power cable connections....................................................................4-15

Figure 4-16. Transfer drives from base to expansion pedestal...............................4-16

Figure 5-1. Second controller pedestal slot location ................................................5-2

Figure 5-2. Saving the existing configuration ..........................................................5-3

Figure 5-3. Saved configuration ...............................................................................5-4

Figure 5-4. Update firmware command ...................................................................5-4

Figure 5-5. Firmware update dialog box ..................................................................5-5

Figure 5-6. Insert SIMM into connector...................................................................5-7

Figure 5-7. Pivot SIMM down to seat ......................................................................5-7

Figure 5-8 Remove controller from top slot.............................................................5-8

Figure 5-9. Restoring configuration to new controller.............................................5-9

Figure 5-10. Restored configuration example ........................................................5-10

Contents vii

List of Tables

Table 1 Related Documents.........................................................................................xi

Table 1-1 RAID Array 3000 Pedestal Part Numbers and Model

Descriptions .............................................................................................. 1-3

Table 1-2 Single Host, Single Adapter Cabling ..................................................... 1-15

Table 1-3 Single Host, Dual Adapter/Dual Controller Cabling ............................. 1-16

Table 1-4 Single Host, Single Adapter/Dual Controller (Y-cable connection

cabling) ................................................................................................... 1-17

Table 1-5 Dual Host, Single Adapter/Single Controller Cabling........................... 1-18

Table 1-6 Pedestal Technical Specifications .......................................................... 1-19

Table 1-7 Pedestal Physical and Power Specification............................................ 1-20

Table 2-1 Controller Specifications.......................................................................... 2-5

Table 2-2 LED/Reset Switch Interface..................................................................... 2-8

Table 2-3 RAID Levels Supported ......................................................................... 2-13

Table 2-4 Pedestal RAID Set Restrictions ............................................................. 2-13

Table 2-5 RAID 0+1 Example................................................................................ 2-17

Table 2-6 Response to Various AC Power Conditions .......................................... 2-23

Table 2-7 Acceptable System Voltage Levels........................................................ 2-24

Table 2-8 Acceptable Termination Voltage Levels................................................ 2-25

Table 2-9 Acceptable 12 Volt Levels ..................................................................... 2-25

Table 2-10 Acceptable External Temperature Levels ............................................ 2-26

Table 2-11 Acceptable Board Temperature Levels................................................ 2-26

Table 3-1 Disk Drive SBB Status LEDs................................................................... 3-4

Table 3-2 SCSI Bus Length and External Cables................................................... 3-16

Table 3-3 Assigned Slot Device Addresses in the Pedestal ................................... 3-16

About This Guide

Purpose and Scope

This guide is designed to for installers and operators of Compaq

StorageWorks

TM

RAID Array 3000 Pedestal Storage Subsystem Hardware

User’s Guide.

Intended Audience

This document is written for installers and operators.

Document Structure

This guide contains the following information:

Chapter 1: Product Overview

n

Product Description

n

Pedestal Features

n

Pedestal Cabinet

n

Pedestal Components

n

Connecting the Pedestal to a Host System

n

Specifications

x RAID Array 3000 Pedestal Storage Subsystem Hardware User's Guide

Chapter 2: RAID Array Controller

n

Controller Overview

n

Controller Features

n

Controller Reset and LED Indicators

n

Flexible RAID Set Configuration

n

Performance Enhancements

n

RAID Levels Supported

n

Redundant Operation

n

Environmental

Chapter 3: Maintenance

n

Pedestal Status and Power LEDs

n

SBB Status LEDs

n

Controller LEDs

n

EMU Error Reporting

n

Replacing Components (FRUs)

n

Differential/Wide UltraSCSI Bus

n

Replacing the Controller Memory Cache Modules

Chapter 4: RAID Array Controller

n

Product Description

n

Expansion Pedestal Cabinet

n

Expansion Pedestal Components

n

Reconfiguring Base Pedestal UltraSCSI Bus

Chapter 5: Second Controller Option

n

Second Controller Option Kit

n

Installing the Upgrade

n

Configuring a Dual Controller Installation for a Single Serial Port

Contents xi

Related Documents

In addition to this guide, the following documentation is useful to the reader:

Table 1

Related Documents

Document Title Part Number

RAID Array 3000 Subsystem Second
Controller Option Installation Guide

EK-SM3KC-IG.E01

RAID Array 3000 Controller Shelf Hardware
Users Guide

EK-SMCPQ-UG.D01

Command Console V2.2 for the RAID Array
3000 (Pedestal and Rack Mount Models)
Users Guide

AA-RBF2C-TE

xii RAID Array 3000 Pedestal Storage Subsystem Hardware User's Guide

Text Conventions

This document uses the following conventions to distinguish elements of text:

Keys Keys appear in boldface. A plus sign (+) between

two keys indicates that they should be pressed
simultaneously.

USER INPUT User input appears in a different typeface and in

uppercase.

FILENAMES File names appear in uppercase italics.

Menu Options,
Command Names,
Dialog Box Names

These elements appear in initial capital letters.

COMMANDS,
DIRECTORY NAMES,
and DRIVE NAMES

These elements appear in uppercase, unless case
sensitive.

Type When you are instructed to type information, type

the information without pressing the Enter key.

Enter When you are instructed to enter information, type

the information and then press the Enter key.

Contents xiii

Symbols in Text

The following symbols are found in the text of this guide to indicate different
types of information.

WARNING:

Text set off in this manner indicates that failure to follow directions

in the warning could result in bodily harm or loss of life.

CAUTION:

Text set off in this manner indicates that failure to follow directions

could result in damage to equipment or loss of information.

IMPORTANT:

Text set off in this manner presents clarifying information or specific

instructions.

NOTE:

Text set off in this manner presents commentary, sidelights, or interesting points

of information.

Symbols on Equipment

The following symbols are placed on equipment to indicate the presence of
potentially hazardous conditions:

This symbol in conjunction with any of the following symbols indicates the
presence of a potential hazard. The potential for injury exists if warnings
are not observed. Consult your documentation for specific details.

This symbol indicates the presence of hazardous energy circuits or electric
shock hazards. Refer all servicing to qualified personnel.

WARNING:

To reduce the risk of injury from electric shock hazards, do not
open this enclosure. Refer all maintenance, upgrades, and servicing to
qualified personnel.

This symbol indicates the presence of electric shock hazards. The area
contains no user or field serviceable parts. Do not open for any reason.

WARNING:

To reduce the risk of injury from electric shock hazards, do
not open this enclosure.

xiv RAID Array 3000 Pedestal Storage Subsystem Hardware User's Guide

This is a test

This symbol on an RJ-45 receptacle indicates a Network Interface
Connection.

WARNING:

To reduce the risk of electric shock, fire, or damage to the
equipment, do not plug telephone or telecommunications connectors into
this receptacle.

This symbol indicates the presence of a hot surface or hot component. If
this surface is contacted, the potential for injury exists.

WARNING:

To reduce the risk of injury from a hot component, allow the
surface to cool before touching.

These symbols on power supplies or systems indicate the
equipment is supplied by multiple sources of power.

WARNING:

To reduce the risk of injury from electric shock,
remove all power cords to completely disconnect power from
the system.

Weight in kg

Weight in lb

This symbol indicates that the component exceeds the recommended
weight for one individual to handle safely.

WARNING:

To reduce the risk of personal injury or damage to the
equipment, observe local occupational health and safety requirements and
guidelines for manual material handling.

Contents xv

Rack Stability

WARNING:

To reduce the risk of personal injury or damage to the equipment,

be sure that:

n

The leveling jacks are extended to the floor.

n

The full weight of the rack rests on the leveling jacks.

n

The stabilizing feet are attached to the rack if it is a single rack
installation.

n

The racks are coupled together in multiple rack installations.

n

Only one component is extended at a time. A rack may become unstable
if more than one component is extended for any reason.

Getting Help

If you have a problem and have exhausted the information in this guide, you
can get further information and other help in the following locations.

Compaq Technical Support

In North America, call the Compaq Technical Phone Support Center at
1-800-OK-COMPAQ. This service is available 24 hours a day, 7 days a week.
For continuous quality improvement, calls may be recorded or monitored.

Outside North America, call the nearest Compaq Technical Support Phone
Center. Telephone numbers for worldwide Technical Support Centers are
listed on the Compaq website. Access the Compaq website:

http://www.compaq.com

xvi RAID Array 3000 Pedestal Storage Subsystem Hardware User's Guide

Be sure to have the following information available before you call Compaq:

n

Technical support registration number (if applicable)

n

Product serial number

n

Product model name and number

n

Applicable error messages

n

Add-on boards or hardware

n

Third-party hardware or software

n

Operating system type and revision level

Compaq Website

The Compaq website has information on this product. Access the Compaq
website:

http://www.compaq.com/storage

Compaq Authorized Reseller

For the name of your nearest Compaq authorized reseller:

n

In the United States, call 1-800-345-1518.

n

In Canada, call 1-800-263-5868.

n

Elsewhere, see the Compaq website for locations and telephone
numbers.

Chapter 1

Product Overview

This chapter provides an overall description of the RAID Array 3000 Storage
System and its components. Examples of Host/Storage System connections
and a list of technical and environmental specifications are included at the end
of the chapter.

NOTE: This guide is the Hardware User’s Guide. For configuration information, refer to the

Getting Started RAID Array 3000 Installation Guide for your Host system and the
Command Console V2.2 for the RAID Array 3000 (Pedestal and Rack Mount Models)
User’s Guide.

Product Description

The RAID Array 3000 storage subsystem is a desk-side storage system
(subsystem) offering the basic components required to create a user-designed
storage array with two 16-bit, differential UltraSCSI bus host interfaces
(Figure 1–1). The pedestal can accommodate up to seven 3½-in storage
devices. The devices, referred to as StorageWorks Building Blocks or SBBs,
are disk drives from the StorageWorks family of storage devices. The release
note that accompanies the subsystem lists the software solutions and disk
drives that are supported. A battery backup subsystem is included as part of
the pedestal enclosure in the form of a freestanding Uninterruptable Power
Supply (UPS). In case of a power failure, the UPS provide a temporary backup
for cache while the subsystem flushes to disks.

1-2 RAID Array 3000 Pedestal Storage Subsystem Hardware User’s Guide

The RAID Array 3000 offering also includes option kits designed to increase
the storage capacity and enhance the performance of the subsystem. The first
is an expansion pedestal (second enclosure) designed to increase the storage
capacity of the subsystem to a maximum of 14 drives. The pedestal expansion
kit option is described in detailed in Chapter 4 “Expansion Pedestal Option” of
this guide.

The second option kit allows the addition of a second RAID controller to the
subsystem for redundancy. The second controller operates in conjunction with
the installed controller to protect data during a malfunction. Chapter 5 “Second
Controller Option” describes how to install the redundant controller option and
how to reconfigure the subsystem to accommodate it.

The RAID Array 3000 pedestal enclosure and its associated options are listed
and described in Table 1–1. Figure 1–1 shows the pedestal with a full
complement of drives (optional) for completeness.

PEDESTAL

UPS

3000-0

1A

Figure 1-1. RAID Array 3000 pedestal enclosure (drives optional)

Product Overview 1-3

The RAID Array 3000 pedestal is equipped with a dual-channel RAID
controller that supports all of the UltraSCSI bus features. It also contains an
Environmental Monitor Unit (EMU) board for environmental monitoring and
error detection.

Table 1-1

RAID Array 3000 Pedestal Part Numbers and Model Descriptions

Compaq Part No. Item Description

DS-SWXRA-GA

RA3000 pedestal subsystem with one controller, 120 V.
Includes: Seven-slot pedestal for wide UltraSCSI SBBs, one HSZ22

two-channel controller with 16 MB cache, Environmental Monitor Unit
(EMU), two 204 watt power supplies with fans, five meter host SCSI
cable (BN37A), BN38E-OB adapter, one 120-volt UPS, and North
American power cords. Disks are not included.

Requires: Solutions Software Kit for platform, host adapter, and disks.
Options: Second HSZ22 controller, seven disk SBB expansion pedestal,

and cache memory upgrade.

DS-SWXRA-GC RA3000 pedestal subsystem with one controller, 230 V.

Includes: Seven-slot pedestal for wide UltraSCSI SBBs, one HSZ22
two-channel controller with 16 MB cache, Environmental Monitor Unit
(EMU), two 204 watt power supplies with fans, five meter host SCSI
cable (BN37A), BN38E-OB adapter, one 230-volt Uninterruptable Power
Supply (UPS), and North American power cords. Disks are not included.

Requires: Solutions Software Kit for platform, host adapter, and disks.
Options: Second HSZ22 controller, seven-disk SBB expansion

pedestal, and cache memory upgrade.

DS-HSZ22-AA RA3000 second controller option which includes:

DS-HSZ22-AA SCSI controller, three 16-MB SIMM modules, 0.8 m
adapter-to-SCSI-3 cable, 5 m SCSI cable, 9-pin serial cable, user
documentation.

DS-HSZ22-AB RA3000 second controller option which includes:

DS-HSZ22-AB SCSI controller, four 32-MB SIMM modules, 0.8 m
adapter-to-SCSI-3 cable, 5 m SCSI cable, 9-pin serial cable, user
documentation.

DS-SWXRA-GD

Expansion Pedestal (120/240 V) with slot space for seven additional
UltraSCSI disk drives.

DS-SWXRA-GR Single 204-watt power supply for RA3000, 120/230 V for on-site spare.

1-4 RAID Array 3000 Pedestal Storage Subsystem Hardware User’s Guide

Pedestal Features

The major features of the pedestal are:

■ Two differential 16-bit UltraSCSI host buses

■ Seven 3½-in disk drive SBB slots

■ One dual-channel RAID array controller

■ Second controller option for redundancy

■ Expansion pedestal option allowing up to fourteen SBB slots in a dual-

pedestal subsystem configuration

■ Memory cache expansion option for the controller

■ Redundant power provided by two fan-cooled universal AC input power

supplies (50/60 Hz, 100 to 240 VAC)

■ Cache backup provided by an external UPS

■ Environmental monitor unit (EMU) for error detection

■ The ability to hot plug SBBs without powering down the system

Pedestal Cabinet

The pedestal cabinet is a modular freestanding storage enclosure that is
completely self-contained. It has two fan-cooled power supplies, an internal
EMU circuit board, and a RAID array controller with front panel display and
control.

Figure 1–2 shows the major components in the pedestal enclosure.

Figure 1–3 identifies the items on the rear panel power supplies. The
characteristics of the pedestal cabinet are:

■ The disk drive storage capacity is seven 3½-in disk drive SBBs.

■ The subsystem slots are numbered 0 through 6 from top to bottom.

■ There are two 68-pin VHDCI female SCSI connectors on the rear panel,

which interconnect the host system to the RAID controller in the
pedestal.

■ The rear panel also contains an alarm switch, a UPS monitor connector,

an external fault condition connector, and a serial port connector (for
controller configuration).

Product Overview 1-5

■

The pedestal is equipped with an internal configuration switch, which

sets the SCSI ID addresses of the controller and the storage devices.

Figure 1-2. Pedestal front panel major components

Figure 1-3. Pedestal rear panel power supplies

1-6 RAID Array 3000 Pedestal Storage Subsystem Hardware User’s Guide

Pedestal Components

The major components in the pedestal subsystem include:

■ Dual-channel RAID array controller

■ Two 16-bit single-ended split SCSI buses

■ Environmental Monitor Unit (EMU)

■ Two universal 50/60 Hz, 120 or 240 VAC power supplies

■ Separate free-standing backup power supply (UPS)

StorageWorks Building Blocks (SBBs)

The pedestal has seven 3½-in disk drive SBB slots. The number of drives that
make up each configuration of the array is left to the end user with a maximum
of seven storage devices.

RAID Array Controller

The controller contains two wide,UltraSCSI differential host channels and two
wide, UltraSCSI single-ended disk channels. In dual-controller configurations,
the controllers support fully automatic and smooth controller failover.

The controller supports one or two standard 72-pin cache SIMMs of up to
32 MB. In a redundant controller setup, both controllers must have identical
cache configurations and the total usable cache (per controller) will be half the
amount installed. Thus, in a single controller setup, the maximum usable cache
is 64 MB while a redundant setup has a maximum usable cache of 32 MB (per
controller).

The RAID Array controller contains the following features:

■ Single PCB form factor for inclusion in the enclosure

■ Support for dual hot-swap controller operation

■ Dual differential Ultra-Wide SCSI host channels

■ Dual single-ended Ultra-Wide SCSI disk channels

■ RAID level 0, 1, 0+1, 4, 5, and JBOD support

■ EMU support

■ Cluster support for Windows

Product Overview 1-7

■

32 Logical Unit (LUNs) per host channel (some operating systems may

be limited to 8)

■ Support for Hot and Warm spare disks

■ UPS-backed write caching

■ Per LUN write cache/write back selection

■ Configuration/Maintenance via RS-232 or host SCSI channel using

StorageWorks Command Console (SWCC)

■ Update of firmware via host channel

Pedestal Power Supplies

The pedestal has two interchangeable, air-cooled, AC power supply modules
located at the rear of the unit. The power supplies provide redundant power if
one of the units should malfunction. Each supply provides +5 and +12 VDC to
power the RAID controller, EMU, and the storage SBBs in the pedestal. In
addition, each unit contains a high-speed fan for pedestal cooling. The upper
power supply is designated as A and the lower as B. The unit contains an AC
power receptacle, a power status LED, a fan, and a latching slider switch to
secure the supply in the pedestal.

UPS

The UPS is separate and free-standing unit designed to protect the pedestal
from problems associated with poor quality AC power or a complete loss of
AC power. The UPS is connected between the AC outlet and the line input of
the pedestal power supply B to provide battery backup power.

The major features of the UPS include Cell Saver Technology (doubles battery
life and speeds recharge time), hot-swap batteries, and network surge
protection. The front panel display has user controls (LEDs and control
buttons) and the rear panel contains a COMM port, which provides UPS status
to the EMU in the pedestal. The rear panel also contains the network surge
protector, a reset button, and four power receptacles. An audible alarm is
activated when input power fails, as a Low Battery Warning, or whenever the
UPS is in need of servicing.

The UPS automatically recharges its battery when power is returned following
a power failure. Recharge time is four to six hours depending on the energy
requirements of your load and the length of the power outage.

1-8 RAID Array 3000 Pedestal Storage Subsystem Hardware User’s Guide

The UPS has its own installation, operation, and service manual. The manual
describes the UPS in detail and is part of the documentation set enclosed with
your subsystem.

Environmental Monitor Unit (EMU)

The EMU is an internal circuit board that monitors the operation of the
pedestal. The EMU monitors power supply voltages, fans, temperatures which
are reported to the user, and controls (turns on and off) the audible alarm and
status LED on the front panel. The EMU also reports the subsystem status to
the controller that reports to the host, and has the capability of exchanging
signals with auxiliary devices and controllers.

The EMU is located internally in the top rear of the pedestal as shown in
(Figure 1–4). It is connected to the SCSI bus and powered by an internal cable.
The following external components on the rear panel of the pedestal are part of
the EMU (Figure 1–5):

■ An alarm switch (S1) that enables (up) or disables (down) the audible

alarm

■ A power monitor connector (UPS) allows the EMU to monitor and

report the status of a battery backup power supply

■ An External Fault Condition connector allows the EMU to monitor the

status of a user-selected device

300

0-3

7

EMU

Figure 1-4. EMU circuit board location

Product Overview 1-9

Figure 1-5 shows the Pedestal rear panel components.

300

0-23

A

Controller (Bottom)

Controller (Top)

Host #1

E

xterna

l

Fault

Host #0

UPS

Figure 1-5. Pedestal rear panel components

1-10 RAID Array 3000 Pedestal Storage Subsystem Hardware User’s Guide

UltraSCSI Buses

The pedestal contains two, 16-bit, single-ended, wide UltraSCSI buses
(factory-configured as a split bus) that connects the controllers to the disk
drives.

The split-bus arrangement is divided into two-bus paths designated device port
0 and device port 1 as shown in Figure 1–6. Port 0 connects the controller to
the upper four devices in the pedestal (IDs 8 through 11) and port 1 connects
the controller to lower three devices (IDs 8 through 10). The device addresses
on the bus are set at the factory by an internal configuration switch
(Figure 1–7).

ID9

ID9

ID11

ID8

ID8

ID10

ID10

Top Controller

Device

Port 0

Device

Port 1

Bottom Controller (Optional)

ID=7

ID=6

ID=7

ID=6

300

0-5

1

Figure 1-6. UltraSCSI bus port and default SCSI ID assignments

When set to a specific position, the switch controls the addresses of each SBB
slot. Figure 1–8 identifies the pedestal slot locations and their corresponding
SCSI ID addresses for each device port.

Product Overview 1-11

The subsystem can be reconfigured for through-bus operation by modifying
the bus and resetting the internal configuration switch. The information needed
to reconfigure the bus from split-bus to a through-bus configuration is
described in Chapter 4 “Expansion Pedestal Option”.

300

0-3

8

6

Figure 1-7. UltraSCSI bus configuration switch

SLOT 0

SLOT 1

SLOT 2

SLOT 3

SLOT 4

SLOT 5

SLOT 6

ID = 8

Controller

Devic

e

Port 0

Devic

e

Port 1

ID = 10

11

8

300

0-5

2

Figure 1-8. Slot locations and SCSI ID addresses

1-12 RAID Array 3000 Pedestal Storage Subsystem Hardware User’s Guide

Connecting the Pedestal to a Host System

This section illustrates how to connect four possible RA3000/Host
configurations. The configurations are:

■ Single host, single adapter configuration

■ Single host, dual adapter/dual controller configuration

■ Single host, single adapter/dual controller configuration (using a

Y-cable)

■ Dual host, single adapter/single controller configuration

NOTE: The following illustrations show the expansion pedestal option as part of the
storage system installation. See Chapter 4 for a full description of the Expansion Pedestal.

Product Overview 1-13

Figure 1-9 shows the Single host, Single Adapter Cabling diagram.

Rear View of DS-SWXRA-GA

Controller Pedestal

Rear View of

DS-SWXRA-GD

Expansion Pedestal

5

6

4

3

2

1

Host

System

Host

Adapter

shr-1311b

Figure 1-9. Single host, single adapter cabling diagram

Table 1-2

Single Host, Single Adapter Cabling

Item Description

å

Host #1 VHDCI connector



Host #0 VHDCI connector

ê

SCSI device bus out connector D0



SCSI Cable BN37A-05 (host adapter connection made using Technology
Adapter cable BN38E-0B, not shown)



SCSI cable 17-04454-01

ñ

SCSI device bus In connector D0

1-14 RAID Array 3000 Pedestal Storage Subsystem Hardware User’s Guide

Figure 1-10 shows the Single host, Dual Adapter/dual Controller Cabling
diagram.

5

6

3

2

1

4

Rear View of DS-SWXRA-GA

Controller Pedestal

Rear View of

DS-SWXRA-GD

Expansion Pedestal

Host

System

Host

Adapter

Host

Adapter

shr-1312b

Rear View of DS-SWXRA-GA

Controller Pedestal

Rear View of

DS-SWXRA-GD

Expansion Pedestal

Figure 1-10. Single host, dual adapter/dual controller cabling diagram

Table 1-3

Single Host, Dual Adapter/Dual Controller Cabling

Item Description

å

Host #1 VHDCI connector



Host #0 VHDCI connector

ê

SCSI device bus out connector D0



(2) SCSI Cables BN37A-05 (host adapter connection made using two Technology
Adapter cables BN38E-0B, not shown)



SCSI cable 17-04454-01

ñ

SCSI device bus in connector D0