Compaq StorageWorks TM RAID Array 3000 Pedestal Storage Subsystem User manual

RAID Array 3000 Controller Shelf

Hardware User’s Guide

EK–SMCPQ–UG. C01

Compaq Computer Corporation

Houston, Texas

While Compaq Computer Corporation believes the information included in this manual is correct

as of the date of publication, it is subject to change without notice. Compaq 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. No responsibility is assumed for the use or reliability of

firmware on equipment not supplied by Compaq or its affiliated companies. Possession, use, or

copying of the software or firmware described in this documentation is authorized only pursuant

to a valid written license from Compaq, an authorized sublicensor, or the identified licensor.

Commercial Computer Software, Computer Software Documentation and Technical Data for

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license and, when applicable, the rights in DFAR 252.227 7015, “Technical Data-Commercial

Items.”

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are registered trademarks of the Hewlett-Packard Company. IBM and AIX are registered

trademarks of International Business Machines Corporation. All other trademarks and registered

trademarks are the property of their respective owners.

This equipment has been tested and found to comply with the limits for a Class A digital device,

pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection

against harmful interference when the equipment is operated in a commercial environment. This

equipment generates, uses and can radiate radio frequency energy and, if not installed and used in

accordance with the manuals, may cause harmful interference to radio communications.

Operation of this equipment in a residential area is likely to cause harmful interference in which

case the user will be required to correct the interference at his own expense. Restrictions apply to

the use of the local-connection port on this series of controllers; failure to observe these

restrictions may result in harmful interference. Always disconnect this port as soon as possible

after completing the setup operation. Any changes or modifications made to this equipment may

void the user's authority to operate the equipment.

Warning!

This is a Class A product. In a domestic environment this product may cause radio interference in

which case the user may be required to take adequate measures.

Achtung!

Dieses ist ein Gerät der Funkstörgrenzwertklasse A. In Wohnbereichen können bei Betrieb dieses

Gerätes Rundfunkstörungen auftreten, in welchen Fällen der Benutzer für entsprechende

Gegenmaßnahmen verantwortlich ist.

Attention!

Ceci est un produit de Classe A. Dans un environnement domestique, ce produit risque

de créer des interférences radioélectriques, il appartiendra alors à l’utilisateur de

prendre les mesures spécifiques appropriées

.

JAPAN

USA

This equipment generates, uses, and may emit radio frequency energy. The equipment has been

type tested and found to comply with the limits for a Class A digital device pursuant to Part 15 of

FCC rules, which are designed to provide reasonable protection against such radio frequency

interference. Operation of this equipment in a residential area may cause interference in which

case the user at his own expense will be required to take whatever measures may be required to

correct the interference. Any modifications to this device - unless expressly approved by the

manufacturer - can void the user’s authority to operate this equipment under part 15 of the FCC

rules.

EK–SMCPQ–UG. C01 v

Contents

Revision Record ............................................................................................................................ vii

About This Guide ..........................................................................................................................ix

1 Product Overview

1.1 Product Description ...........................................................................................................1–1

1.2 Shelf Features.....................................................................................................................1–5

1.3 Controller Shelf Enclosure................................................................................................1–5

1.4 Shelf Cabinet Installation..................................................................................................1–7

1.5 Shelf Major Components...................................................................................................1–7

1.5.1 RAID Array Controller ...............................................................................................1–7

1.5.2 Device I/O Module......................................................................................................1–8

1.5.3 Host I/O Module....................................................................................................... 1–10

1.5.4 Shelf Cooling............................................................................................................ 1–12

1.5.5 Controller Shelf Power Supplies............................................................................. 1–12

1.5.6 Uninterruptable Power Supply (UPS)..................................................................... 1–13

1.6 6-Slot Device Expansion Shelf (Optional) ................................................................... 1–14

1.7 Connecting the RAID Array 3000 Controller Shelf to a Host System....................... 1–14

1.8 Specifications .................................................................................................................. 1–19

2 RAID Array Controller

2.1 Controller Overview ..........................................................................................................2–1

2.2 Controller Features.............................................................................................................2–3

2.3 Controller Reset and LED Indicators ...............................................................................2–5

2.4 Flexible RAID Set Configuration.....................................................................................2–6

2.5 Performance Enhancements..............................................................................................2–7

2.5.1 Custom Components...................................................................................................2–7

2.5.2 Efficient Write and Read Algorithms........................................................................2–7

2.6 RAID Levels Supported.....................................................................................................2–8

2.6.1 RAID 0..........................................................................................................................2–9

2.6.2 RAID 1....................................................................................................................... 2–11

RAID Array 3000 Controller Shelf

vi EK–SMCPQ–UG. C01

2 RAID Array Controller (continued)

2.6.3 RAID 0+1...................................................................................................................2–11

2.6.4 RAID 4 .......................................................................................................................2–13

2.6.5 RAID 5 .......................................................................................................................2–14

2.6.6 JBOD..........................................................................................................................2–16

2.7 System Parameters...........................................................................................................2–16

2.8 Redundant Operation.......................................................................................................2–16

2.8.1 Initialization...............................................................................................................2–17

2.8.2 Message Passing........................................................................................................2–17

2.8.3 Failover ......................................................................................................................2–17

2.9 Environmental..................................................................................................................2–18

2.9.1 Backup Power Management.....................................................................................2–18

3 Installation and Maintenance

3.1 Installation Guidelines ......................................................................................................3–1

3.2 Installing Shelves in the Cabinet......................................................................................3–2

3.2.1 Installing Shelf Supports............................................................................................3–7

3.2.2 Installing UPS Brackets..............................................................................................3–9

3.3 Power and SCSI Cable Connection Procedures............................................................3–13

3.3.1 SCSI Bus Target Addresses and Termination ........................................................3–14

3.3.2 Cabling a Single Device Expansion Shelf Subsystem...........................................3–15

3.3.3 Cabling a Two Device Expansion Shelf Subsystem ..............................................3–18

3.3.4 Cabling a Three Device Expansion Shelf Subsystem............................................3–21

3.3.5 Cabling a Four Device Expansion Shelf Subsystem..............................................3–24

3.4 Controller Shelf Status LEDs .........................................................................................3–27

3.5 Controller LEDs...............................................................................................................3–28

3.6 Replacing Components (FRU’s) ....................................................................................3–28

3.6.1 Replacing a Host or Device I/O SBB......................................................................3–30

3.6.2 Replacing a Power Supply SBB...............................................................................3–31

3.6.3 Replacing the RAID Controller ...............................................................................3–32

3.6.4 Replacing the UPS ....................................................................................................3–33

3.6.5 Replacing a Blower...................................................................................................3–33

3.6.6 Replacing the Controller Memory Cache Modules ...............................................3–35

4 Second Controller Option

4.1 Introduction........................................................................................................................4–1

4.2 Install Firmware Upgrade .................................................................................................4–2

4.2.2 Save Existing Configuration ......................................................................................4–3

4.2.3 Install Two SIMMs.....................................................................................................4–5

4.3 Install New Controller.......................................................................................................4–6

4.3.1 Restoring Configuration.............................................................................................4–7

4.4 Configuring a Dual Controller Installation for a Single Serial Port..............................4–9

Contents

EK–SMCPQ–UG. C01 vii

Figures

1–1 RAID Array 3000 Controller Shelf ..................................................................................1–2

1–2 RAID Array 3000 6-Slot Device Expansion Shelf..........................................................1–3

1–3 Controller Shelf Major Components................................................................................1–6

1–4 RAID Array Controller......................................................................................................1–7

1–5 Device I/O Module.............................................................................................................1–9

1–6 Device I/O Module Blower Status LEDs...................................................................... 1–10

1–7 Host I/O Module.............................................................................................................. 1–11

1–8 Power Supply................................................................................................................... 1–13

1–9 Single Host, Single Adapter, with One Active Controller........................................... 1–15

1–10 Single Host, Single Adapter, with Two Active Controllers ........................................ 1–16

1–11 Single Host, Dual Adapter, Two Ports, with Two Active Controller......................... 1–17

1–12 Dual Host, Single Adapter, with One Active Controller per Host.............................. 1–18

2–1 RAID Array 3000 Single Controller Block Diagram......................................................2–2

2–2 Bridging the Gap Between the Host and the Device Expansion Shelf..........................2–3

2–3 Logical Units Created from Storagesets, Partitions, and Disk Drives ..........................2–4

2–4 Controller Front Panel .......................................................................................................2–6

2–5 RAID 0 Write .................................................................................................................. 2–10

2–6 Diagram of a RAID 1 Write........................................................................................... 2–11

2–7 Diagram of a RAID 0+1 Write....................................................................................... 2–12

2–8 Diagram of a RAID 4 Write........................................................................................... 2–13

2–9 Diagram of a RAID 5 Write........................................................................................... 2–15

3–1 Recommended Single Expansion Shelf Installation ......................................................3–3

3–2 Recommended Controller Shelf Installation (Two Expansion Shelves).......................3–4

3–3 Recommended Controller Shelf Installation (Three Expansion Shelves) ....................3–5

3–4 Recommended Controller Shelf Installation (Four Expansion Shelves) ......................3–6

3–5 RETMA Cabinet Shelf Supports.......................................................................................3–9

3–6 UPS Rack-mount Bracket Assemblies.......................................................................... 3–11

3–7 UPS Bracket RETMA and Metric Hole Locations (Front) ......................................... 3–11

3–8 UPS Bracket RETMA and Metric Mounting Hole Locations (Rear)......................... 3–12

3–9 Controller/Single Device Expansion Shelf Cabling Diagram..................................... 3–16

3–10 AC Power Wiring Diagram............................................................................................ 3–17

3–11 Controller/Two Device Expansion Shelf Cabling Diagram........................................ 3–19

3–12 Controller/Three Device Expansion Shelf Cabling Diagram...................................... 3–22

3–13 Controller/Four Device Expansion Shelf Cabling Diagram........................................ 3–25

3–14 Shelf Status LEDs ........................................................................................................... 3–27

RAID Array 3000 Controller Shelf

viii EK–SMCPQ–UG. C01

Figures (continued)

3–15 Controller Shelf Field Replaceable Units......................................................................3–29

3–16 Replacing the Host I/O SBB...........................................................................................3–30

3–17 Removing the Controller from the Shelf.......................................................................3–32

3–18 Replacing a Blower Assembly........................................................................................3–34

3–19 Controller Cache Modules..............................................................................................3–36

3–20 Release Locking Clips.....................................................................................................3–36

3–21 Remove Installed SIMM Modules.................................................................................3–37

3–22 Install Replacement Modules.........................................................................................3–38

3–23 Pivot Module Down to Secure........................................................................................3–38

4–1 Update Firmware Command.............................................................................................4–2

4–2 Firmware Update Dialog Box...........................................................................................4–3

4–3 Saving the Existing Configuration...................................................................................4–4

4–4 Saved Configuration..........................................................................................................4–4

4–5 Insert Module into SIMM Connector...............................................................................4–5

4–6 Pivot Module Down to Seat..............................................................................................4–5

4–7 Remove Controller from Top Slot....................................................................................4–6

4–8 Restoring Configuration to New Controller....................................................................4–7

4–9 Restored Configuration Example.....................................................................................4–8

Tables

1–1 RAID Array 3000 Part Numbers and Model Descriptions ............................................1–4

1–2 Controller Shelf Technical Specifications.....................................................................1–15

1–3 Controller Shelf Power and Physical Specifications....................................................1–17

2–1 LED/Reset Switch Interface .............................................................................................2–5

2–2 RAID Levels Supported....................................................................................................2–8

2–3 Shelf RAID Set Restrictions.............................................................................................2–9

2–4 RAID 0+1 Example .........................................................................................................2–12

2–5 Response to Various AC Power Conditions..................................................................2–18

3–1 Shelf Support Mounting Kits and Installation Guides ...................................................3–7

3–2 RETMA Cabinet Shelf Support Parts List.......................................................................3–7

3–3 UPS Rack-mount Bracket Mounting Hardware List....................................................3–10

3–4 Controller Shelf Field Replaceable Units......................................................................3–29

EK–SMCPQ–UG. C01 ix

Revision Record

This Revision Record provides a concise publication history of this guide. It lists the

revision levels, release dates, and reasons for the revisions.

The following revision history lists all revisions of this publication and their

effective dates. The publication part number is included in the Revision Level

column, with the last entry denoting the latest revision. This publication supports

the StorageWorks RAID Array 3000 Controller Shelf.

Revision Level Date Summary of Changes

EK–SMCPQ–UG. A01 May 1998 Original release.

EK–SMCPQ–UG. B01 July 1998 Adds RETMA cabinet

shelf support installation

procedures.

EK–SMCPQ–UG. C01 July 1999 Adds Shelf-to-Host

connection diagrams to

Chapter 1 and dual

controller configuration

procedure to Chapter 4.

EK–SMCPQ–UG. C01 xi

About This Guide

This section identifies the audience of this guide and describes the contents (chapter-by-

chapter) and structure. In addition, this section includes a list of associated documents

and the conventions used in this guide.

Intended Audience

This guide is intended for installers and operators of the RAID Array 3000

Controller Shelf. Installing the shelf requires a general understanding of basic

SCSI terminology and product installation procedures.

Document Structure

This guide contains the following chapters:

Chapter 1: Product Overview

Product Overview provides an overview and a physical hardware description of

the RAID Array 3000 controller shelf. It includes the major features, a brief

description of the major components, a series of controller shelf-to-host

connection diagrams, and the specifications for the shelf.

Chapter 2: RAID Array Controller

RAID Array Controller describes the major features and characteristics of the

controller in the RAID Array 3000. It also lists the RAID levels supported by the

subsystem and a brief description of each level. Redundant operation and

environmental considerations (i.e. backup power management, voltages, and

temperature) are covered at the end of the chapter.

Chapter 3: Installation and Maintenance

Installation and Maintenance recommends how to install the controller and

device expansion shelves in a rackmount RETMA or metric cabinet. The

information covers both single and multiple device expansion shelf installations.

The chapter also describes how to interpret the status and power LEDs on the

front panel, how to replace a Field Replaceable Unit (FRU), and how to add or

replace a SIMM module in the RAID controller.

RAID Array 3000 Controller Shelf

EK–SMCPQ–UG. C01

xii

Chapter 4: Second Controller Option

Second Controller Option describes how to install a second (redundant) RAID

controller in the shelf for redundancy. It also contains a dual controller

installation procedure for a single serial port.

Associated Documents

In addition to this guide, refer to the following documentation to properly install

and setup your specific subsystem configuration:

Table 1 Associated Documents

Document Title Order Number

StorageWorks RAID Array 3000 Configuration and

Maintenance Guide

EK–SMCS2–UG

7 Device, 16-Bit SBB Shelf (BA356-S Series) User’s Guide EK-BA356-UG

StorageWorks SBB Shelf I/O Modules User’s Guide EK-SBBIO-UG

RAID Array 3000 Getting Started for Windows NT-Intel

Installation Guide

AA-RACZA-TE

RAID Array 3000 Getting Started for Windows NT-Alpha

Installation Guide

AA-RACUA-TE

RAID Array 3000 Storage Subsystem Second Controller

Option Installation Guide

EK-SM3KC-IG

Command Console 2.1 for RAID Array 3000, User’s Guide AA-RBF2B-TE

RETMA Shelf Rail Kit Installation Guide EK-35XRB-IG

RETMA Bracket Installation Guide ER-PCBAR-AA

About This Guide

EK–SMCPQ–UG. C01

xiii

Conventions

This guide uses the following documentation conventions:

Table 2 Style Conventions

Style Meaning

plain monospace type Text

boldface type

For the first instance of terms being defined in

text, or both.

italic type For emphasis, manual titles, chapter

summaries, keyboard key names

.

Table 3 Nomenclature Convention

RAID Advisory Board Description RAID Array 3000 Usage

RAID 0 STRIPset

RAID 1 MIRRORset

RAID 0+1 STRIPED MIRRORset

RAID 4 STRIPED with a Fixed parity drive

RAID 5 STRIPED with a Floating parity drive

RAID Array 3000 Controller Shelf

EK–SMCPQ–UG. C01

xiv

Support and Services

Who to contact in the Americas

Information and Product Questions: Local Sales Office / StorageWorks Hotline

1-800-786-7967

Installation Support: Contact the COMPAQ Distributor where the

Storage Solution was Purchased / Local

Compaq Sales Office.

Multivendor Customer Service (MCS):

Installation Contact the Compaq Customer Support Center

(CSC).

Warranty Contact the Compaq Customer Support Center

(CSC) for warranty service after solution is

installed and operating.

Remedial Contact the Compaq Customer Support Center

(CSC) Note: A Service Contract is

recommended when the equipment is out of

warranty. Contact the local Compaq Sales

Office. Customer Support Center (CSC)

1 800-354-9000

Who to contact in Europe

Information and Product Questions: Contact the Compaq Distributor or reseller

Installation Support and Installation: Contact the Compaq Distributor or reseller from

whom the Storage Solution was purchased.

For Warranty Service See the Warranty Card packaged with the

product.

For Remedial Service Contact the Compaq Distributor or reseller from

whom the Storage Solution was purchased.

Note: A Service Contract is recommended

when the equipment is out of warranty.

Who to contact in Asia Pacific

For all services, contact the Compaq Distributor or reseller from whom the

equipment was purchased

EK–SMCPQ–UG. C01 1–1

1

Product Overview

This chapter provides an overall description of the RAID Array 3000 Controller Shelf and

its components. A series of cabling diagrams showing how to connect the Controller

Shelf to a host system and a list of technical and environmental specifications is also

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 for Windows NT – Intel

Installation Guide

and the

StorageWorks Com-

mand Console (SWCC) 2.1 User’s Guide.

1.1 Product Description

The RAID Array 3000 Controller Shelf (Figure 1–1) is a rackmount storage sys-

tem containing the basic components required to manage a storage array with

two 16-bit, differential, UltraSCSI bus host interfaces. 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 storage system

lists the software solutions and disk drives that are supported.

The Controller Shelf is connected to one or multiple (up to four) 6-slot Device

Expansion Shelves (shown in Figure 1–2) to form the complete RAID Array

3000 storage system. The expansion shelf is offered as an option with a mini-

mum of one shelf required. It contains six SBB slots for the disk drives, two

power supplies, and a personality I/O module that connects the SCSI interface

with the controller shelf. The Device Expansion Shelf is supported by its own

user’s guide (Part No.: EK–BA356–UG) which must be used in conjunction with

this document to properly install and configure your storage system.

RAID Array 3000 Controller Shelf

1–2 EK–SMCPQ–UG. C01

NOTE

The Device Expansion Shelf (DS-SWXRA-GN)

must have a revision level of B01 (or higher) to

operate with the RAID Array 3000 Controller Shelf.

Also, the Personality I/O module supplied with the

shelf (part no. 70-33067-02) must have a mini-

mum revision level of H01 or higher.

The Controller Shelf and the accompanying Device Expansion Shelves are in-

stalled in a standard RETMA or metric rackmount cabinet design. The Device

Expansion Shelves are typically mounted directly above the Controller Shelf in

the cabinet. Each shelf is supplied with a bracket mounting kit to secure the unit

into the desired cabinet design. The bracket kit for a metric cabinet is optional

and must be ordered separately.

Figure 1–1 RAID Array 3000 Controller Shelf

S

HR-1

0

3

4

Chapter 1. Product Overview

EK–SMCPQ–UG. C01 1–3

Figure 1–2 RAID Array 3000 6-Slot Device Expansion Shelf (Optional)

S

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0

9

1

A battery-backup subsystem is included with the Controller Shelf in the form of

a rackmount UPS (Uninterruptable Power Supply). In case of a power failure, the

UPS provides temporary power to the storage system while it flushes its cache

contents to disks. The UPS is normally installed in the lowest available slot in

the cabinet.

CAUTION

The UPS is sized to perform this function for the

Controller and Device Expansion Shelves only. No

other electrical devices should be plugged into the

UPS.

As an option, a second RAID controller module can be added for redundancy.

The second controller operates in conjunction with the installed controller to

protect data in case of a malfunction in the primary unit. The optional controller

is installed directly below the primary controller in the center of the shelf.

The RAID Array 3000 Controller Shelf enclosure and its associated options are

listed and described in Table 1–1.

RAID Array 3000 Controller Shelf

1–4 EK–SMCPQ–UG. C01

Table 1–1 Controller Shelf Part Numbers and Model Descriptions

DIGITAL Part No. Item Description

DS-SWXRA-GH RA3000 UltraSCSI Rackmount Controller/Shelf with one

controller, 120 V, which Includes:

One BA356 type shelf

One HSZ22 RAID controller with 16 MB of cache

Two 180 Watt power supply SBBs, two dual-port, differen-

tial, Ultra Wide, Host I/O modules

One dual-channel, wide, single-ended device I/O module

One 1000 Watt UPS with rackmount bracket

One five meter host SCSI cable

Two 9-pin serial controller cables

Two Trilink SCSI cable adapters

One gray C13-to-125 V power cord

One black C13-to-125 V power cord

One Controller Shelf rackmount kit

User documentation.

Requires: Solutions Software Kit for platform, host

adapter, and disks.

Options: Second HSZ22-AA controller and cache memory

upgrade.

DS-SWXRA-GK RA3000 UltraSCSI Rackmount Controller/Shelf with one

controller, 230 V, which includes:

Except for power cord (DS-SWXRA-GK includes one

black C13-to-230 V), same as DS-SWXRA-GH above.

DS-SWXRA-GN RA3000 UltraSCSI Rackmount 6-Slot Storage Expansion

Shelf which includes:

16-bit shelf assembly, two 180 Watt power supply SBBs,

16-bit Personality I/O assembly, shelf rack mounting kit,

power cords, user documentation.

DS-HSZ22-AA RA3000 Second Controller Option which includes:

DS-HSZ22-AA SCSI controller, three 16-MB SIMM mod-

ules, 0.8 m adapter-to-SCSI-3 cable, 5 m SCSI cable, 9-

pin serial cable, user documentation

Chapter 1. Product Overview

EK–SMCPQ–UG. C01 1–5

1.2 Shelf Features

The RAID 3000 Controller Shelf is equipped with a dual-channel RAID control-

ler that supports all of the UltraSCSI bus features.

The major features of the controller shelf are:

•

One dual-channel RAID array controller

•

Second controller option for redundancy

•

Memory cache expansion option for the controller

•

Redundant power provided by two universal ac input power supplies (50/60

Hz, 100 to 240 V ac)

•

Dual two-speed blowers for shelf cooling

•

Cache backup provided by an external Uninterruptable Power Supply (UPS)

•

Controls from one-to-four 6-slot Device Expansion Shelves for a total of 24

UltraSCSI devices

•

Can be installed in a RETMA or metric style rackmount cabinets

1.3 Controller Shelf Enclosure

The Controller Shelf is housed in an rack-mount enclosure. It has two power

supplies, a single RAID Array controller, an empty slot for a second (redundant)

controller, two host I/O assemblies, and a dual-bus device I/O assembly. Two

blowers located at the back of the enclosure cool the shelf.

An internal backplane assembly connects the RAID controller and the power and

host I/O SBBs. The backplane contains five connectors which provide the inter-

face between the Shelf SBBs and the controller. Two 300-pin connectors located

in the center of the backplane provide the controller interface. The backplane

connection to the blowers is made through two separate 9-pin female connectors,

one for each blower.

The backplane also contains a complement of circuit components that provide

SCSI bus termination, blower fail/safe circuits, UPS power sense circuit, shelf

status and dc power monitoring, and a speaker alarm circuit with an operator

controlled alarm disable switch. The outputs of the shelf status and dc power

monitoring circuits are connected to two LED indicators on the front panel of the

shelf to notify the operator during a malfunction. The alarm disable switch al-

lows the operator to turn off the audible alarm if desired.

RAID Array 3000 Controller Shelf

1–6 EK–SMCPQ–UG. C01

Figure 1–3 shows the major components in the controller shelf. Its characteristics

are outlined below.

•

An easily removable, two channel, resident RAID Array controller and an ad-

jacent empty slot for a second (redundant) controller (optional)

•

There are two 68-pin VHDCI female SCSI connectors on the front panel of the

device I/O assembly which interconnect the RAID controller to the SCSI

buses in each storage shelf. SCSI connections to multiple Device Expansion

Shelves are made using Trilink adapters

•

The front of the shelf contains two LEDs that monitor the status of the shelf

and the shelf dc power supplies

•

The front of the shelf has a toggle switch that allows the operator to disable

the shelf alarm during an error condition

•

The shelf host I/O assemblies each contain two 68-pin VHDCI female SCSI

connectors that interconnect the host systems to the RAID controller

•

Each host I/O assembly contain a 9-pin serial port connector (for controller

configuration) and a 9-pin UPS monitor connector

•

Two dc power supplies (one redundant) that power the shelf components

•

The shelf contains two high-speed, plug-in blowers for shelf cooling

Figure 1–3 Controller Shelf Major Components

SH R-10 51

DC Power

Supplies

Blowers

RAID

Co ntroller

Host 0

I/O Module

Host 1

I/O Module

Blank

Panel

Device I/O

Module

Chapter 1. Product Overview

EK–SMCPQ–UG. C01 1–7

1.4 Shelf Cabinet Installation

The Controller Shelf can be mounted in a StorageWorks metric or RETMA style

cabinet. You must install the appropriate shelf rail kit hardware to properly

mount the shelf in the cabinet. The RETMA rail kit is supplied with the shelf and

contains the installation guide which describes the installation procedure. The

rail kit for a metric cabinet is optional.

The commercial UPS supplied with the Controller Shelf is installed in the cabi-

net using a special mounting bracket designed to accommodate either a metric or

RETMA style cabinet. The bracket has two sets of mounting holes at each end

which allows its installation into either cabinet.

1.5 Shelf Major Components

The major components in the controller shelf (see Figure 1–3) include:

•

Dual-channel RAID array controller (a second redundant controller is op-

tional)

•

A 16-bit, device I/O module with the SCSI bus isolator/converter circuitry

•

Two 16-bit, host I/O modules that interface the host(s) to the shelf controller

•

Two universal 180 W, 50/60 Hz, 120 or 240 Vac power supplies

•

Two dual-speed blowers to cool shelf components

1.5.1 RAID Array Controller

The RAID controller (Figure 1–4) 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 in the event of a RAID controller fault.

Figure 1–4 RAID Array 3000 Controller

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0

4

8

Cache Memor

y

Modules

RAID Array 3000 Controller Shelf

1–8 EK–SMCPQ–UG. C01

The controller supports one (for a single controller) or two (for dual-controllers)

standard 72-pin cache SIMMs of up to 64 MB. In a dual-controller setup, both

controllers must have identical cache configurations and the total usable cache

(per controller) will be half the amount installed due to mirroring. Thus, in a sin-

gle controller setup the maximum usable cache is 128 MB while a redundant

setup has a maximum usable cache of 64 MB (per controller).

The RAID Array 3000 controller contains the following features:

•

Single PCB form factor for inclusion in the shelf

•

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

•

Voltage/temperature monitoring and support

•

Cluster support for specific operating systems

•

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

limited to 8)

•

Support for spare disks

•

UPS backed write caching

•

Per LUN write cache/write back selection

•

Configuration/Maintenance via serial or host SCSI channel using (SWCC)

StorageWorks Command Console (refer to the operating system platform kit

for details).

•

Update of firmware via host channel

1.5.2 Device I/O Module

The device I/O module (Figure 1–5) provides the electrical interface between the

RAID controller and the device buses. The module resides in the far right slot of

the Shelf and has the following features:

•

Ability to electrically isolate the controller shelf and the device SCSI buses

•

Single channel, single shelf, single-ended bus operation

•

Single channel, single-ended bus operation for two Device Expansion

Shelves using a Trilink adapter

• External 16-bit data bus connections

• Switch selectable 16-bit, 8-bit, or no SCSI bus termination

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Compaq StorageWorks TM RAID Array 3000 Pedestal Storage Subsystem User manual

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