Compaq PROLIANT 3000 User Manual

RAID Array 3000 Controller Shelf

Hardware User’s Guide

EK–SMCPQ–UG. C01

Compaq Computer Corpo rat ion Houston, Texas

While Comp aq Computer Co rp o ra tio n b elie v e s th e in fo rmatio n in c lu d ed in th is ma n u a l is c o rrec t 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 infring e e x istin g o r fu tu re p a ten t rig h ts, nor do the d es crip tio n s c o n tain ed in th is 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 relia b ility o f firmware on eq u ip men t n o t su p plie d b y C o mp aq o r its affilia te d c o mp an ie s. Possession , use, or copying of the software or firmware described in this documentation is authorized only pursuant to a valid writte n lic en se fro m C o mp a q , a n au th o riz ed s ub lic e ns o r, o r th e id en tifie d lice n so r.

Commercial Computer Software, Computer Software Documentation and Technical Data for

Commercial Items a re lic e ns ed to th e U .S. Go ve rn me nt with Compaq ’s sta n d ard c omme rc ial license and, when applicable, the rights in DFAR 252.227 7015, “Technical Data-Commercial Items.”

Compaq, the Compaq logo, DIGITAL, DIGITA L U N IX, D E Cconnect, H S Z, H SG , StorageWorks, VMS, OpenVMS Registered in the United States Patent and Trademark Office.

UNIX is a registered trademark in the United States and other countries exclusively through X/Open Company Ltd. Windows NT is a registered trademark of the Microsoft Corporation. Sun is a registered trademark of Sun Microsystems, Inc. Hewlett-Packard, TACHYON, and HP-UX 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 d e vic e , pursuant to P a rt 15 o f th e F C C Rules. T h es e limits a re d e sig n e d to p ro v id e rea so n a b le p ro te ctio n against harmful in te rfere n c e when the equ ip men t is o p e rate d in a c o mmerc ia l en v iro n men t. 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 o f th is eq u ip men t in a res ide n tial a re a is lik ely to c au se h armfu l in te rfere n ce in which case the user w ill b e req u ire d to c o rrec t th e in te rfere n ce a t his o w n e x pe n se . Restrictions a pp ly 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 Gegenmaß n ah me n ve ra ntwortlich 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 equipme n t g en e rate s, uses, an d may e mit rad io fre qu e n cy e n erg y . The equip men t h a s b ee n type tested and found to comply with the limits for a Class A d igita l d e vic e pu rs u an t to P a rt 15 o f FCC rules, which are designed to provide reasonable protection against such radio frequency interference. Operation of th is e q u ipme n t in a re sid e ntia l a rea ma y ca u se inte rfe ren c e in which case the user at h is o wn expense will be required to ta k e whatever measu re s ma y be re qu ire d 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.

Contents

Revision Reco rd ............................................................................................................................ vii

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

1 Product Ov erv i ew

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 D evice I/O Module......................................................................................................1–8

1.5.3 H ost I/O Module....................................................................................................... 1–10

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

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

1.5.6 U ninterruptable 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 C ustom 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

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RAID Array 3000 Controller Shelf

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 Co ntroller Op ti o n

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

vi EK–SMCPQ–UG. C01

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 Logic a l U n its Created from Stor ag e se ts, Partitions, a n d D is k D riv e s..........................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

Contents

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RAID Array 3000 Controller Shelf

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

viii EK–SMCPQ–UG. C01

Revision Record

This Revision Record provides a concise publication history of this guide. It lists the revision levels, release dates, and reasons for the r evisions.

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. C 01 ix

About This Guide

This section identifies the audience of this guide and describes the contents (chapter- bychapter) and structure. In addition, this section includes a list of associated documents and the conventions used in this guide.

Intended Audie nc e

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: Pro d uct 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 Controll er

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.

EK–SMCPQ–UG. C01 xi

RAID Array 3000 Controller Shelf

Chapter 4: S eco n d Controll er O ption

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 Do cu ments

In addition to this guide, refer to the following documentation to properly install and setup your specific subsystem configuration:

Table 1 Associated Documents

Document T itle Order Number

StorageWorks RAID Ar ray 3000 Configur ation and Maintenance G uide

7 Device, 16-Bit SBB Shelf (BA356-S Series ) User’s Guide EK-BA356-UG StorageWorks SBB Shelf I /O Modules Us er’s Guide EK-SBBIO-UG RAID Array 3000 Getting St arted for Windows NT-Int el

Installation Guide RAID Array 3000 Getting St arted for Windows NT-Alpha

Installation Guide RAID Array 3000 Storage Subsystem Second Controller

Option Installat ion Guide 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

EK–SMCS2–UG

AA-RACZA-TE

AA-RACUA-TE

EK-SM3KC-IG

xii

EK–SMCPQ–UG. C01

Conventions

This guide uses the following documentation conventions:

Table 2 Style Conventions

Style Meaning

plain monospace type Text

boldface type

itali c type For emphasi s, manual titles, chapter

Table 3 Nomenclature Convent i on

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

For the fi rst instance of terms being defined in text, or both.

summaries, keyboard key nam es

About This Guide

EK–SMCPQ–UG. C01

xiii

RAID Array 3000 Controller Shelf

Support and Services

Who to con ta ct i n the Americas

Information and Product Questions: Local Sales Of fice / St orageWorks Hotline

1-800-786-7967

Installation Support: Contact the COMPAQ Distribut or where the

Storage Solut ion was Purchased / Local Compaq Sales Office.

Multivendor Customer Service (MCS): Installation Contact t he Com paq Customer Suppor t Center

(CSC).

Warranty Contact t he Com paq Customer Suppor t Center

(CSC) for warranty service after solution is installed and operating.

Remedial Contact the Compaq Cus tomer Support Center

(CSC) Note: A Service Contract i s recommended when the equipment is out of warranty. Contact the local Compaq Sal es Office. Customer Support Center (CSC) 1 800-354-9000

Who to contact in Europe

Information and Product Questions: Contact the Compaq Di stribut or or resel ler Install ation Support and I nstallati on: Contact the Compaq Distributor or resell er from

whom the Storage Solution was purchased.

For Warranty Service See the Warranty Card packaged with the

product.

For Remedial Service Contact t he Com paq Distri butor or reseller from

whom the Storage Solution was purchased. Note: A Serv ice Contract is r ecommended

when the equipment is out of war ranty.

Who to contact in Asia Pacific

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

xiv

EK–SMCPQ–UG. C01

Product Overview

This chapter provides an overall description of the RAID Arr ay 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

Started RAI D Array 3000 for W indows NT – Intel Installation Guide mand Console (SWCC) 2.1 User ’s Guide.

and the

StorageWorks Com-

1.1 Product Description

The RAID Array 3000 Controller Shelf (Figure 1–1) is a rackmount storage system 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 di sk drives from t he Storage W orks family of storage devices. The release note that accompanies the storage system lists the software solutions and disk drives tha t are supporte d.

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 minimum 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.

Getting

EK–SMCPQ–UG. C01 1–1

RAID Array 3000 Controller Shelf

034

NOTE

The Device Expansion Shelf (DS-SWXRA-GN) must have a revision level of B01 (or higher) to operate wit h the RAID Array 3000 Controller Shelf. Also, the Personal ity I/O m odule suppl ied with t he shelf (part no. 70-33067-02) must have a minimum revision lev el of H01 or higher.

The Controller Shelf and the accompanying Device Expansion Shelves are installed 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

HR-1

1–2 EK–SMCPQ–UG. C01

Chapter 1. Product Overview

Figure 1–2 RAID Array 3000 6- Sl ot Device Expansi on Shel f ( Optional)

HR-1

A battery-backup subsystem is included with the Controller Shelf in the form of a rackmount UPS (Unint e rrupt ab le Powe r Suppl y). In c a se of a powe r f ailure, the UPS provides temporary power to the storage system while it flushes its cache contents to di sks. The UPS is normally installed in the lowest available slot in the cabinet.

CAUTION

The UPS is si zed to perform this funct ion for the Controller and Device Expansion Shelves only. No other elec tr i cal dev ic es shoul d be pl ugged int o 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 T a ble 1–1.

EK–SMCPQ–UG. C01 1–3

RAID Array 3000 Controller Shelf

Table 1–1 Controller Shel f Par t Number s and M odel 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, dif f e r ential, 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 adapter s 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 memor y upgrade.

DS-SWXRA-GK RA3000 UltraSCSI Rackmount Contr oller/ 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 assem bly , t wo 180 W at t power supply SBBs, 16-bit Personality I/O assembly, shelf rack mounting kit, power cords, user documentat ion.

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, 9pin serial cable, user documentation

1–4 EK–SMCPQ–UG. C01

Chapter 1. Product Overview

1.2 Shelf Features

The RAID 3000 Controller Shelf is equipped with a dual-channel RAID controller 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 provide d by a n e xt e rnal Uni nt e rrupt a bl e Powe r Suppl y (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 interface 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 allows the operator to turn off the audible alarm if desired.

EK–SMCPQ–UG. C01 1–5

RAID Array 3000 Controller Shelf

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-pi n 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 Maj or Com ponent s

Blowers

DC Power

Supplies

1–6 EK–SMCPQ–UG. C01

RAID

Controller

Blank Pa nel

Host 0

I/O M od ule

Host 1

I/ O M o du le

Device I/O

Module

SH R-10 51

Chapter 1. Product Overview

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 cabinet 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 Compon ents

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/convert e r ci rc uit ry

•

Two 16-bit, host I/O m o dul e s that interface the host(s) to the shelf controller

•

Two universal 180 W, 50/60 Hz, 120 or 240 Vac po we r 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 Control l er

Cache Memor

Modules

EK–SMCPQ–UG. C01 1–7

HR-104

RAID Array 3000 Controller Shelf

The controller supports one (for a single controller) or two (for dual-controllers) standard 72-pin cache SIMMs of up to 64 MB . I n a d ual-cont r oller 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 single 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, a nd 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 wr ite 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

1–8 EK–SMCPQ–UG. C01

Chapter 1. Product Overview

Two-speed blower operation

•

SBB shelf blower control to include error detection, reporting, and automatic

•

corrective action

Figure 1–5 Device I/O Module

Upper

Mounting

Tab

Device Port 0

Connector

Devi ce Po rt 1

Connec tor

Lower

Mounting

The dual-channel device I/O module has two 68-pin VHDCI female connectors

Tab

HR-104

mounted on the front panel (see Figure 1–5). The upper connector is the “device port 0” connector. The lower connector is the “device port 1” connector.

The device I/O module top and bottom guides properly align the module in the shelf and with the backplane connector at the back of the shelf. When you install the module the two-spring steel mounting tabs expand and engage the shelf. The combination of the mounting tabs and the backplane connector ensures that the module is firmly seated.

The front edge of the internal circuit board in the device I/O module contains two-blower status LEDs (see Figure 1–6). Under normal operating conditions, the LEDs are ON. When there is a blower error or an over-temperature condition, they are FL ASHING. T h e uppe r L E D displ a y s t he status of the left blower and the lower LED displays the status of the right blower. The blowers cool the device I/O module by drawing air in through the slots in the front and exhausting it out the rear of the shelf. Re fe r to t he Storage W orks SBB Shelf I/O Module User’s Guide (part no. EK-SBBIO-UG) supplied with the Device Expansion Shelf for a description of the blower status LEDs when troubleshooting a shelf-cooling problem.

EK–SMCPQ–UG. C01 1–9

RAID Array 3000 Controller Shelf

Figure 1–6 Device I/O Modul e Bl ower Status LEDs

Left

Blower

LED

SCSI Bus

Add res s Sw it ch S3

(Not Used)

Right

Blower

LED

SCSI Bu s

Termin at ion

Switch S4

NOTE

HR-104

The SCSI bus address switch on the Controller

Shelf devic e I/O module does not control the t arget address es of the SBB s lots i n the Devic e Expansion Shelves . This s wit c h has been elec tr i cal ly disabled by design. Refer to the StorageWorks

SBB Shelf I/O Module Us er’s Guide s upplied wit h the Device Expansion Shelf for a description of how to set t he SCSI IDs in each shelf.

SCSI bus termination switch S4 configures the SCSI bus termination of the Device Expansion Shelves in the RAID Array 3000 storage system. The proper settings for S4 are included in the c abl i ng proce dure s in Chapt e r 3 of thi s guide .

1.5.3 Host I/O Module

The Controller Shelf contains two identical Host I/O modules (see Figure 1–7). The module located directly to the left of the device I/O module is designated as H1 and the module in the adjacent slot as H0. The host I/O module provides the interface between the host bus and the controller(s) in the shelf.

1–10 EK–SMCPQ–UG. C01

Figure 1–7 Host I/O Module

036

Host O ut

Host I n

Chapter 1. Product Overview

CTR

The front panel of the host I/O module contains two 68-pin VHDCI SCSI co n-

UPS

HR-1

nectors and two 9-pin D connectors. The SCSI connectors provide the SCSI bus connections between the adapter in the host system and the controller(s) in the Shelf. One of the 9-pin D connectors interfaces the UPS status signals to the controller. The other provides a serial connection between its respective controller, the Shelf, and the SWCC configuration/maintenance PC.

The high-density SCSI connectors on the Host I/O module are designated Host In (bottom connector) and Ho st Ou t (t op c onnec t or). Ho st I n provi de s the SCSI connection for a one-to-four expansion shelf cabinet installation. Cable connections to multiple storage shelves are made through Trilink adapters.

In addition to the front panel connectors, the Host I/O module contains three passive differential SCSI bus terminators that terminate the SCSI bus from the host system. Termination is automatically disabled when a cable is connected to the Host Out co n nector. T h e UPS se r ial connector on the host I/O module (designated CTR 0 and CTR 1) provides shelf status information to the UPS.

NOTE

If you have onl y one SCSI c able c onnec ti on to t he

host I/O module, you must connect the cable to the

Host In

connector. Do not use any external bus termination. The module is used for mi d-bus connec tions i n a multiple-host system configuration.

Host Out

connector on the

EK–SMCPQ–UG. C01 1–11

RAID Array 3000 Controller Shelf

1.5.4 Shelf Cooling

The device I/O module ensures that the SBBs and Controller Shelf are at the proper operating temperature by monitoring the operational status of the blowers and sensing the ambient air temperature.

The two dual-speed blowers cool all the shelf components by drawing ambient air in through the front of the SBBs and exha usting i t out t he rea r of t he Controller Shelf. The blowers normally operate at low speed. Reduction of the airflow through the shelf or an increase in the ambient temperature may result in overheating causing component failure or data corruption.

The device I/O module ambient temperature circuitry monitors the air flowing

through the module. If the ambient temperature exceeds 32ºC + 2º C, the circuitry:

Turns on both blower LEDs

•

Causes both blowers to switch to the high-speed mode to increase air flow

•

through the shelf

When the I/O module circuitry detects a blower that is not operating or not operating at the correct RPM, this circuitry:

Turns ON a LED on the I/O module front panel that identifies the defective

•

blower Causes the operational blower to switch to the high-speed mode to increase

•

air flow through the shelf, thereby maintaining the proper operating environment

NOTE

The Controller Shelf power supply status LEDs

also display blower error conditions. However, they do not identify the defective blower, nor do they report ambient air temperature faults.

1.5.5 Controller Shelf Power Supplies

The Controller Shelf has two interchangeable, air-cooled, 180 watt AC power supply SBBs (see Figure 1–8) located at the left two SBB slots of the shelf. 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(s), the host I/O modules, the device I/O module, and the blowers. The first power supply from the left edge of the shelf is designated as "A" and the second as "B". The SBB front panel has an ac input power receptacle, a power supply status LED, and a shelf status LED.

1–12 EK–SMCPQ–UG. C01

Figure 1–8 Powe r Supply

Chapter 1. Product Overview

SHR-103

1.5.6 Uninterruptable Power Supply (UPS)

The pri m ary funct i o n of t h e UPS is to keep t h e entire storage sys tem powered-up to enable the controller(s) to flush cache to disks. The UPS also protects the storage system from problems associated with poor quality AC power or a complete loss of AC power. The UPS i s normally mounted in a lower shelf slot in the cabinet using a custom set of mounting brackets.

The ma j o r features o f t h e UPS i n c lude Battery Management Technology (doubles battery life and speeds recharge time), hot-swap batteries to simplify service, voltage regulation, power control which enables scheduled shutdowns and maximized run time, and network surge protection.

The front panel display ha s user cont rols (LE Ds and cont rol but t ons) and the re ar panel contains an RS-232 COMM port which provides UPS status to the electronics in the Controller Shelf. The rear panel also contains the network surge protector, 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 se r v i c ing. The front panel control switches are used to set the output voltage level and battery low-warning option.

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

Its own installation, operation, and service manual support the UPS. The manua l describ e s the UPS in detail and is part of the documentation set enclosed with your storage system.

EK–SMCPQ–UG. C01 1–13

RAID Array 3000 Controller Shelf

1.6 6-Slot Device Expansion Shelf (Optional)

NOTE

The RAID Array 3000 Controller Shelf is designed to operate with the Storage-

Works BA356-S Series Device Expansion Shelf (shown in Figure 1–2. The Device Expansion Shelf is a rackmount enclosure that houses the storage devices for your storage system installation. The Controller Shelf can be connected to one, or up to four Device Expansion Shelves giving the storage system a maximum capacity of 24 storage devices.

The Device Expansion Shelf is equipped with two dc power supplies, a personality I/O module that provides the UltraSCSI bus interface, and six empty slots for storage device SBBs. The user’s guide for the Device Expansion Shelf is packaged with the unit and must be used with this document to properly install and configure the RAID Array 3000 Controller Shelf.

1.7 Connecting the RA3000 Controller Shelf to a Host System

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

Single host, single adapter, with one active controller

•

Single host, single adapter, with two active controllers

•

Single host, dual adapter, two port with two active controllers

•

Dual host, single adapter, with one active controller per host

•

1–14 EK–SMCPQ–UG. C01

Chapter 1. Product Overview

Figure 1–9 Singl e Host , Si ngl e Adapte r, with One Acti ve Cont r ol l er

Host

System

Host

Adapter

SHR-1316

BA356 Device Expansion Shelves

2 RAID Array 3000 Controller Shelf 3 SCSI Cable BN37A-05 (host adapter connection made using Technology

Adapter cable BN38E-OB, not shown)

4 Host In Connector on H0 I/O Module 5 Host-In Connector to H1 I/O Module (not used in this configuration) 6 SCSI Cables BN37A-OE (2) for Device I/O Module 0 7 SCSI Cables BN37A-OE (2) for Device I/O Module 1

EK–SMCPQ–UG. C01 1–15

RAID Array 3000 Controller Shelf

Figure 1–10 Singl e Host , Single Adapter, with Two Active Contr ol l e rs

Host

System

Host

Adapter

SHR-1317

BA356 Device Expansion Shelves

2 Host In Connector on H0 I/O Module 3 RAID Array 3000 Controller Shelf 4 SCSI Cable BN37A-05 (host adapter connection made using Technology

Adapter cable BN38E-OB, not shown)

5 SCSI Cable BN37A-OE combining Host Modules H0 and H1 6 Host In Connector on H0 I/O Module 7 Host In Connector on H1 I/O Module 8 H1 Host I/O Module Host-Out Connector (not used in this configuration) 9 SCSI Cables BN37A-OE (2) for Device I/O Module 0 10 SCSI Cables BN37A-OE (2) for Device I/O Module 1

1–16 EK–SMCPQ–UG. C01

Chapter 1. Product Overview

Figure 1–11 Single Host, Dual Adapt er , Two Port with Tw o Act ive Controllers

Host

System

Host

Adapter

Host

Adapter

SHR-1318

BA356 Device Expansion Shelves

2 RAID Array 3000 Controller Shelf 3 SCSI Cable BN37A-05 (host adapter connection made using Technology

Adapter cable BN38E-OB, not shown)

4 SCSI Cable BN37A-05 (host adapter connection made using Technology

Adapter cable BN38E-OB, not shown)

5 Host In Connector on H0 I/O Module 6 Host In Connector on H1 I/O Module 7 SCSI Cables BN37A-OE (2) for Device I/O Module 0 8 SCSI Cables BN37A-OE (2) for Device I/O Module 1

EK–SMCPQ–UG. C01 1–17

RAID Array 3000 Controller Shelf

Figure 1–12 Dual Host, Singl e Adapter , with One Acti ve Cont roller per Host

Host

System

Host

Adapter

Host

System

Host

Adapter

SHR-1319

BA356 Device Expansion Shelves

2 RAID Array 3000 Controller Shelf 3 SCSI Cable BN37A-05 (host adapter connection made using Technology

Adapter cable BN38E-OB, not shown)

4 SCSI Cable BN37A-05 (host adapter connection made using Technology

Adapter cable BN38E-OB, not shown)

5 Host In Connector on H0 I/O Module 6 Host In Connector on H1 I/O Module

1–18 EK–SMCPQ–UG. C01

Chapter 1. Product Overview

7 SCSI Cables BN37A-OE (2) for Device I/O Module 0 8 SCSI Cables BN37A-OE (2) for Device I/O Module 1

1.8 Specifications

Table 1–2 Controller Shel f Techni cal Specifications

Feature Description Model RA3000 rack mount controller shelf (DS-SWXRA-GH, -G K)

RA3000 rack mount disk shelf (DS-SWXRA-GN)

Controller shelf description

Disk controller s helf BA356 disk SBB shelf with two 180 W at t power supplies,

Controller model One HSZ22 standard Dual active controllers Yes with DS-HSZ22 second controller upgrade Controller cache 16 MB standard

Backup for cache 1000 VA “Uninterruptable Power Supply”,

Controller operation (with 2 controllers)

Controller failover Yes, automatic Mirrored write-back

cache Write through cache Yes Command Queuing Yes, 64 commands Write gathering Yes Host channels Two UltraSCSI Wide Differential Drive channels Two UltraSCSI Wide Single ended Maximum transfer r at e 44.7 MB per second per controller pair RAID 5 sustained

transfer rate

BA356 style shelf with one HSZ22 controller, two 180 Watt power supplies, two host I/O modules, one dual channel

Ultra –wide, single ended personality module, blue

one single channel Ultra –wide, single ended personality module, blue

64 MB standard with two controllers

standard with controller shelf Active-active (recommended)

Active-passive (spare)

Yes

Read – 32.6 MB per second per controller pair Write – 30.6 MB per second per cont r oller pair

EK–SMCPQ–UG. C01 1–19

RAID Array 3000 Controller Shelf

Table 1–2 Shelf Techni cal Specifications ( cont inued)

Feature Description Maximum I/O per sec-

4,400 I/O per second

ond Sustained Raid 5 I/O

rate -- 2 KB block

Read -- 1,375 I/O per second per controller pair

Write – 392 I/O per second per controller pair

transfers

RAID levels supported 0, 1, 0+1, 4, 5 Non-RAID disk support

Yes

(JBOD) Reconstruct time Configurable with SWCC Stripe size / chunk size Variable Maximum Logical

Drives (L UNs ) Maximum disk/ RAID

sets

Up to 30 RAID sets Up to 16 redundancy groups (LUNs) per RAID set Two, 32 blocks. Theoretical 2.2 petabytes; restricted by

drive capacity Boot from RAID set Yes, operating systems dependent Passthrough to tape,

Not supported CD

Maximum number of

24 in four disk shelves disks

Maximum disks per

12 device port

Global spare Yes Drive support 2, 4, 9, 18 GB Wide UltraSCSI drives in SBB Redundant fans Yes Drive reconstruct Automatic with spare Disk hot swap Yes Redundant power

Yes supplies

Environmental moni-

Yes, monitors power and tem per at ur e toring

Setup/control lines 1 Serial per controller Serviceability Hot swap components RAID Manger GUI

support

StorageWorks Command Console V2.0 (SWCC) available

for all platforms.

1–20 EK–SMCPQ–UG. C01

Chapter 1. Product Overview

Table 1–2 Shelf Techni cal Specifications ( cont inued)

Feature Description Regulatory approvals EMI/R I -- FCC Class A, CSA 108.8 Class A, VCCI level 1,

BICQ Class A, CISPR-22 Clas s A, C-Tick Class A

Safety -- UL 1950 3

edition, AS/NZ 3260, IEC 950 CSA

22.2 #950,1995, EN60950/A3:1995, VDE 0905, TUV, G S Mark, CE mark

Table 1–3 Controller Shel f Pow er and Physi cal Speci f i cat ions

Operating Environment Specification Power required 110-120/220-240 VAC, 50/60 Hz, Single Phase,

Two 180 Watt power modules @ 2.5 / 1. 2 A each Temperature -- opt imal, Temperature --minimum re-

18 to 24° C ( 65 to 75° F)

10 to 40° C (50 to 104° F )

quired

Relative hu m id ity – optim a l Relative hu m id ity – minimu m

required

40% to 60% non condensing

10% to 90% non condensing

Maximum wet bulb temperat ur e 28

Minimum dew point: 2

C (36o F)

C (82o F)

Altitude Up to 8,000 ft (2,400 m) Inlet air volume 0.026 cubic meter per second (50 cubic feet per m i-

nute) Air quality Not to exceed 500,000 particles per cubic foot of air

at a size of 0.5 micron or larger Non-operating Environment

Temperature -40 to +66° C ( -40 to 151° F) Relative humidity 8% to 95% non condensing in original shipping con-

tainer Altitude Fr om –300 m t o 3, 600 m ( - 1,000 ft. to 12,000 ft ) Physical Characteristics

Installed Dimensions

Controller and disk shelves UPS

- Height 150 mm (5.9 in) /4 U 8.9mm (3.5 in) /2U

- Width 445 mm (17.5 in) 48.2mm (19 in)

- Depth 350 mm (13.8 in) 40.6mm (16.0 in)

- Weight Controller shelf 9.5kg (21

UPS 27kg (58 lbs.) lbs.) Disk shelf 7.3 kg.(16 lbs.)

(1) Disk SBBs not included

EK–SMCPQ–UG. C01 1–21

RAID Array Controller

This chapter describes the major feat ures and characteristics of t he RAID arr ay controller in the controller shelf.

2.1 Controller Overview

The RAID Array controller provides high performance, high-availability access to SCSI disk array subsystems along a wide UltraSCSI bus. With a modular hardware design and an intuitive configuration utility, the controller is designed to meet a wide range of storage needs.

The controller consists of a single 5 1/2” x 8” circuit board mounted in a subassembly. The package consists of the controller board, a 300-pin connector, mechanical insertion assists, and a front panel LED/reset switch interface. All signals to the controller are routed through the backplane connector.

Figure 2–1 shows a simplified block diagram of the controller and its interfaces to the major compone nt s in the RAID Array 3000 . The uni t i s confi gured wit h two Ultra-Wide, differential, SCSI host channels capable of transferring data to and from the host at rates up to 40 MB/s. The host SCSI IDs are configurable via the Host Parameters and can support 32 deep tagged queuing. The controller is also configured with two Ultra-Wi de , single -e nded, SCSI disk channe l s capa bl e of transferring data to and from the disk drives at rates up to 40 MB/s. Each channel can support up to 12 drive s.

The controller has two SIMM connectors. The connectors form a mirrored pair when the controllers are configured in a redundant controller configuration; otherwise they are fully accessible by the controller. 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 128 MB while a redundant setup has a maximum usable cache of 64 MB (per controller).

EK–SMCPQ–UG. C01 2–1

RAID Array 3000 Controller Shelf

050

Figure 2–1 RAID Array 3000 Si ngl e Contr ol ler Block Diagram

Ult ra SCS I

Differential, Wide

Interface

RAID Array 3000 Controller Shelf

RAID Co nt ro l le r

Write -B ac k

Cache

Module

Host

System 0

Cac he

Interface

Host I/O

Assy

Controller / Bus

Modules

2 Device P ort s

Ultra SCSI Wide

Single-Ended

Interface

Device I/O

Assy

Port 0

Port 1

Host

System 1

UPS Control

Interface

CTR Serial

Interface

Device Storage Shelves

To UPS

Maintenance PC

HR-1

2–2 EK–SMCPQ–UG. C01

Chapter 2. RAID Array Controller

There are two configurations for redundant pairs of controllers: Active/Active Failover mode and Active/Passive Failover mode. In Active/Active Failover, each controller in the redundant pair has one active SCSI host port and one passive SCSI host port. Redunda nc y Groups (Vi rt ua l LUNS) c a n be m a ppe d only t o one active host port and are not accessible from the passive port or the other controller (i.e. partitioned model).

In Active/Passive Failover, one controller in the redundant pair has both SCSI host ports active and the other controller is in a standby passive mode. Redundancy Groups (Virtual L UNs) c a n be m appe d t o either SCSI host port or to both as in the single controller model.

In both cases a single controller failure will not affect the subsystem because the surviving controller will take over.

2.2 Controller Features

The controller is the intelligent bridge between the host and the devices in the

shelf. From the host’s perspective, the controller is simply another SCSI device connected to one of its I/O buses. Consequently, the host sends its I/O requests to the controller just as it would to any other SCSI device. Figure 2–2 shows the role of the controller between the host and the Device Expansion Shelf.

Figure 2–2 Bridgi ng t he G ap Between the Host and Device Expansion Shelf

Host

EK–SMCPQ–UG. C01 2–3

Storage

Shelf

Controller

HR-1042

RAID Array 3000 Controller Shelf

gica

From the storage shelf’s perspective, the controller receives the I/O requests from the host and directs them to the devices. Since the controller processes all the I/O requests, it eliminates the host-based processing that is typically associated with reading and writing data to multiple storage devices.

The controller does much more than simply manage I/O requests: it provides the ability to combine several ordinary disk drives into a single, high-performance storage unit called a storageset. Storagesets are implementations of RAID technology, also known as a “Redundant Array of Inde pende nt Disks”. E very storageset shares one important feature: whether it uses two disk drives or 12, each storageset looks like a single stora ge uni t to t he host.

You create storage units by combining disk drives into storagesets such as stripesets, RAIDsets, and mirrorsets, or by presenti ng the m to t he host as single -di sk units (see Figure 2–3).

Figure 2–3 Logical Unit s Cr eat ed f r om St or ageset s, Partitions, and Di sk

Drives

Mirrorset

Logical Unit

Partitioned Storageset

L Unit

Stripset

Raidset

Striped

Disk Drives

Logical Unit

Mirrorset

Partitioned Disk Drive

Logical Unit

2–4 EK–SMCPQ–UG. C01

Chapter 2. RAID Array Controller

Stripesets (RAID 0) combine disk drives in serial to increase transfer or re-

•

quests rates Mirrorsets (RAID 1) combine disk drives in parallel to provide a highly reli-

•

able storage unit RAID 4 provides striping with a fixed parity dri ve

•

RAIDsets (RAID 5) combine disk drives in serial - just like stripesets - but

•

also store parity data to ensure high reliability Stripe mirrorsets (RAID 0 + 1) combine mirrorsets in serial to provide the

•

highest throughput and availability of any storage unit

2.3 Controller Reset an d LED In d i ca to rs

Figure 2–4 illustrates the front panel of the controller. All LEDs are numbered from left to right. The re set but t on (LE D 0) fla shes green a bout once e very sec ond (heartbeat) to indicate that the controller is operating normally. LEDs 1 through 4-display host and disk channel activity (amber). LED 5 (normally off) comes on red during a controller failure. The LED/Reset switch interface is defined in Table 2–1.

Table 2–1 LED/Reset Switch Interface

LED # Name

0 Heart Beat/LED Controller Reset Switch (green) 1 Host Channel 0 Activit y LED (amber) 2 Host Channel 1 Activity LED (amber) 3 Disk Channel 0 Activity LED (amber) 4 Disk Channel 1 Activity LED (amber) 5 Fault LED (red)

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RAID Array 3000 Controller Shelf

Figure 2–4 Contr ol l er Fr ont Panel

Reset H0 H1 D1 F aultD0

Reset H0 D0H1 D1 Fault

HR-104

2.4 Flexible RAID Set Configuration

In addition to its flexi bl e ha rdware design, t he cont rol le r’s firm ware offe rs the user the flexibility to configure RAID sets in several different ways:

RAID sets can comprise drives from any drive c ha nnel a nd SCSI ID.

•

A RAID set can contain all the drives connected to the controller, a single

•

drive, or any number of drive s in bet wee n. The controller supports RAID Levels 0, 1, 0+1, 4, and 5. It also supports

•

JBOD (Just a Bunch of Drives), allowing you to connect standalone disk drives (such as a system disk) to the controller without making them members of a RAID set.

Each RAID set can be partitioned into smaller redundancy groups.

•

Any drive may be designated as a spare. Spares are global, meaning that in

•

the event of a drive failure, the controller will search for the first available spare on any channel or SCSI ID and automatically begin rebuilding the failed drive’s data.

• All configuration and monitoring of RAIDsets accomplished via SWCC with

software platform kit.

2–6 EK–SMCPQ–UG. C01

Chapter 2. RAID Array Controller

2.5 Perfo rmance Enhancements

The controller employs a number of techniques to achieve as much performance as possible from its design.

2.5.1 Custom Components

To increase performance and reliability, the controller’s core functions have been encapsulated in four custom ASIC (Application Specific Integrated Circuits) components as follows:

XOR ASIC: Used in the Exclusive -Or parity calculations employed by RAID levels 4 and 5.

DMA ASIC: Controls the data path hardware for the various I/O ports CPU Interfa c e ASIC: Supports the controller’s MIPS R3000 RISC central

processing unit. Memory Controller ASIC: Controls the memory system and supports data

movement on the internal bus at a maximum burst rate of 80 MB/second and a maximum sustainable rate of 60 MB/second.

2.5.2 Efficient Write and Read Algorithms

Standard RAID write operations that involve parity, such as those in RAID levels 4 and 5, require multiple, time-consuming steps:

1. Read data from the parity drive.

2. Read existing data from the target data drives.

3. Exclusive-Or the old parity, old data, and new data to generate new parity data.

4. Write the new parity data to the parity drive.

5. Write the new data to the target data drives.

The controller uses several techniques to streamline write operations and significantly improve performance. All the techniques use the controller’s on-board cache 60-nanosecond SIMMs.

NOTE

The controller will not operate wi thout at least one 16 MB SIMM installed in its cache. Nor will it operate without an un-interruptable power supply connected to t he controller. W ithout a UPS, data stored in t he cache, but not y et wri tten t o the dis k drives , would be l ost i n the ev ent of a power int erruption.

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RAID Array 3000 Controller Shelf

2.5.2.1 Write-Bac k Caching

When the host sends data to be written to a redundancy group the controller stores the data in its cache and immediately reports to the host it has completed the write. The controller eventually writes the data to the disk drives when the write can be done most efficiently, or when the controller must flush the cache to make room for other data or to prepare for a shutdown.

Write-back caching makes the host more responsive to the user, since the host does not have to wait for a lengthy RAID write before proceeding to another task.

2.5.2.2 Write Gathering

The controller will attempt to consolidate multiple writes destined for contiguous blocks and then write the entire data block in one operation. The controller stores the data in cache until it performs the write. Ideally, the controller will wait until it has gathered enough data to fill an entire stripe. This enables the controller to avoid reading from the parity and data drives before making the write. All it has to do is calculate parity from the data it already has in its cache, then write the data and parity to the drives. Even if the controller cannot accumulate enough data to fill a stripe, the consolidation of small writes can reduce the number of read/write operations that must take place.

2.5.2.3 Write O n Top

If the host commands that data be written to disk, and data for that address is

pending in the controller’s cache, the controller writes the new data on top of the old in the cache. Only the new data is eventually written to the disk drives.

2.6 RAID Levels Supported

The RAID Array 3000 controller supports the following RAID levels:

Table 2–2 RAID Levels Supported

RAID Level Description

0 Stripi ng without parity 1 Mirroring

0+1 Stripi ng and m irroring

4 Stripi ng with fix ed parity dr ive 5 Stripi ng with floating parity drive

JBOD “Just a Bunch of Dri ves”

2–8 EK–SMCPQ–UG. C01

Chapter 2. RAID Array Controller

There are some restrictions you must adhere to when creating a RAID set using the RAID 3000 shelf. The minim um a nd m axi m um num be r of drive s requi red t o

support each RAID level is listed in Table 2–3.

Table 2–3 Shelf RAID Set Restri ctions

RAID Level Min. No. of

Drives

JBOD 1 1

02 24 12 24

0+1* 4 16

43 24 53 24

Must be even number.

Max. No. of

Drives

2.6.1 RAID 0

RAID 0 breaks up data into smaller chunks and writes each chunk to a different

drive in the array. The size of each chunk is determined by the controller’s chunk size parameter, which you set in the course of creating a RAID set.

The advantage of RAID 0 is its high bandwidt h. By bre aki ng up a la rge bloc k of data into smaller chunks, the controller can use multiple drive channels to write the chunks to the disk drives. Furthermore, RAID 0 involves no parity calculations to complicate the write operation. Likewise, a RAID 0 read operation employs multiple drives to assemble a single, large data block. This makes RAID 0 ideal for applications such as graphics, video, and imaging that involve the writing and reading of large, sequential blocks. Figure 2–5 shows a diagram of a RAID 0 write.

CAUTION

The lack of parity means t hat a RAID 0- disk arr ay offers no redundancy and thus cannot recover from a drive failure.

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RAID Array 3000 Controller Shelf

Figure 2–5 RAID 0 Write

Host Data Controll er div ides the

1011 0110 1010 0101 0000

0001 1100

1111 0111

1010

data into chunks ized unit s

1011 0110 1010 0101 0000

There is s ti ll data lef t

so the Controller

repeats t he pr oc ess

0001 1100 1111 0111 1010

Striped data written to the array

HR-1

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Chapter 2. RAID Array Controller

055

2.6.2 RAID 1

RAID 1 (also known as mirroring or shadowing) takes data sent by the host and duplicates it on all the drives in an array. The result is a high degree of data availability, since you can lose all but one drive in the array and still have full access to your data. This comes at a price: a RAID 1 array requires multiple

drives to achieve the storage capacity of a single drive. Figure 2–6 illustrates a RAID 1 write.

Figure 2–6 Diagram of a RAID 1 Wr i te

Host Data

0010 1011 0110

Controller writes data from cache

to all drives i n

the array

HR-1

A RAID 1 array will show up on the monitor as “degraded” when at least one drive fails, even if two or more members of the redundancy group remain in good working order. As long as at least two working drives remain in the array, you may continue to run the array in degraded mode without putting data in jeopardy.

2.6.3 RAID 0+1

RAID 0+1 (see Figure 2–7) combines RAID 0 (striping) with RAID 1 (mirroring). In RAID 0+1 write, the controller breaks up the data block from the host into smaller chunks, then writes the chunks to half the drives in the array, while writing duplicate chunks to the remaining drives.

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RAID Array 3000 Controller Shelf

056

Figure 2–7 Diagram of RAID 0+1 Wr i te

Host Dat a

1110 1101 1011

Con tro ll er di vid es

the data into

chunksized unit s

1110 1101 1011

Striped data written to half the dr ives

Striped data mirrored to the remaining drives

HR-1

In the event of a drive failure, a RAID 0+1 array will enter degraded mode and continue to operate by substituting the failed drive with its mirror.

When the controller creates a RAID 0+1 set, it first sorts the drives by channel number and SCSI ID. Then it stripes the data across every other drive and forms a mirrored pair with the fi rst two drive s, a not her m i rrored pa i r with t he second

two drives, and so on. Table 2–4 describes how the controller uses the drives in a RAID 0+1 set.

Table 2–4 RAID 0+1 Example

Drives Select ed Function

Channel 1, ID 0 First member of stripe set. Channel 1, ID 1 Mirror of channel 1, ID 0 Channel 1, ID 2 Second member of stripe set Channel 2, ID 0 Mirror of channel 1, ID 2 Channel 2, ID 1 Third member of st ripe set Channel 2, ID 2 Mirror of channel 2, ID 1

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Chapter 2. RAID Array Controller

2.6.4 RAID 4

RAID 4 (Figure 2–8) breaks up host data into chunks, calculates parity by performing an exclusive-or on the chunks, and then writes the chunks to all but one drive in the array and the parity data to the last drive. When the host requests data from the disk drives, the controller retrieves the chunks containing the addressed data, reconstitutes the data from the chunks, and passes the data to the host.

Figure 2–8 Diagram of a RAID 4 Wr i te

Host Data

0011

0110

1011

0000

0110

1111

1110

Cont r o l le r di vides the

data into chunksized units

and ca lc u l at e s p arity

0011

0110

1011

0000

0110

1111

1110

0000

0011 1011 0110 1110

1110

0110 0000 1111 1110

0111

XOr

Parity =

There is still data left

so the Controller

repeats the P r oc es s

XOr

Parity =

Striped data and parity written to the array

HR-1

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RAID Array 3000 Controller Shelf

In the event of a single drive failure, a RAID 4 array will continue to operate in degraded mode. If the failed drive is a data drive, writes will continue as normal, except no data will be written to the failed drive. Reads will reconstruct the data on the failed drive by performing an exclusive-or operation on the remaining data in the stripe and the parity for that stripe. If the failed drive is a parity drive, writes will occur as normal except no parity will be written. Reads will simply retrieve data from the data disks. There will be no deterioration in controller performance while a RAID set is in degraded mode.

In general, RAID 4 is best suited for applications such as graphics, imaging, or video that call for reading and writing large, sequential blocks of data. However, you may find that RAID 4 is preferable to RAID 5 even for applications characterized by many small I/O operations, such as transaction processing. This is due

to the controller’s intelligent caching, which efficiently handles small I/O reads and writes, and to the relatively less complex algorithms needed to implement RAID 4.

The benefits of RAID 4 disappear when you have many, small I/O operations scattered randomly and widely across the disks in the array. RAID 4’s fixed parity disk becomes a bottleneck in such applications, as the following example illustrates. Let’s say the host instructs the controller to make two small writes. The writes are widely scattered, involving two different stripes and different disk drives. Ideally, you would like both writes to take place at the same time, but RAID 4 makes this impossible, since the writes must take turns accessing the fixed parity drive. For this reason, RAID 5 is the better choice for widely scattered, small write operations.

CAUTION

RAID 4 can withstand a s ingle failur e and handle I/O acti vity without interrupti on in degraded mode until the failed drive is rebuilt. If a second drive fails while the RAID s et is i n degraded mode, t he entire RAID set will fail.

2.6.5 RAID 5

RAID 5 (Figure 2–9) addresses the bottleneck issue for barrages of widely scattered, small I/O operations. Like RAID 4, RAID 5 breaks up data into chunks, calculates parity, and then writes the chunks in stripes to the disk drives, saving one drive one each stripe for the parity data. Unlike RAID 4, however, RAID 5 changes the parity drive on each stripe. This means, for instance, that a write operation involving drive 2 on stripe 1 can conceivably take place at the same time as a write involving drive 3 on stripe 2, since they would be addressing different parity drives.

2–14 EK–SMCPQ–UG. C01

Figure 2–9 Diagram of a RAID 5 Wr i te

058

Chapter 2. RAID Array Controller

Host Data

1101

0111

0110

1110

1011

0001

0010

0110

Contr ol ler di vide s th e

data into chunksized units

and ca lcul at es par i ty

1101

0111

0110

1110 1011 0010

0010

1011 0110 1011 0010

0001

0110

0111

1110

0001

0110

1110

XOr

Parity =

There is still data left

so the Controller

repeat s th e P roc ess

XOr

Parity =

Stripe d data an d parit y written to the array

Stripe d data written to the array

and pari ty

HR-1

RAID 5 handles drive failures in the same manner as RAID 4, except the parity is different for each stripe. The controller either uses the parity information on a stripe to reconstruct its data or simply reads the data as normal, depending on the

location of the stripe’s parity drive.

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While RAID 5 is ideally suited for applications with many, small I/O operations, there is no reason why it cannot function equally well for applications with large, sequential I/O operations. This makes RAID 5 an excellent all-purpose RAID level.

CAUTION

RAID 5 can withstand a s ingle failur e and handle I/O acti vity without interrupti on in degraded mode until the failed drive is rebuilt. If a second drive fails while the RAID s et is i n degraded mode, t he entire RAID set will fail.

2.6.6 JBOD

JBOD, which stands for “Just a Bunch of Disks”, makes it possible to c onne ct one or standalone disk drives to the controller. A JBOD disk drive is not part of a redundancy group, even though the controller assigns a redundancy group number to the drive. This number becomes that logical unit number (LUN) that the host will use to address the drive.

One use for JBOD is to connect a system disk drive to the controller. The drive does not become part of a RAID set, but it is made available to the host on the same SCSI bus as the other devices controlled by the controller.

2.7 Sy s tem Pa rameters

The system parameters allow the user to customize certain aspects of the controller via the SWCC Graphical User Interface.

2.8 Redundant Operation

When operating in a redundant configuration, the two controllers are linked such that, in case of a failure, the surviving controller can access the other controller’s cache memory and complete all operations that were in progress when the failure occurred. The controllers support two different configurations:

ACTIVE / ACTIVE: One host port is active on each controller. The other

•

port on each controller is passive and only used if the peer controller fails. This configuration is recommended.

ACTIVE / PASSIVE: Both host ports on one controller are active. The

•

other controller’s ports are both passive and only used if the primary controller fails.

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When one controller fails, the survivor will process all I/O requests until the failed controller is repaired and powered on. The subsystem will then return to its previous state (i.e., ACTIVE / ACTIVE or ACTIVE / PASSIVE).

2.8.1 Initialization

During initialization, the firmware in the RAID 3000 verifies that both controllers have consistent configurations including identical memory cache and system parameters. If the controller setups are incompatible, the set is not bound and each controller operates in stand-alone mode.

2.8.2 Message Passing

Information is shared between the two controllers by a collection of messages passed through the backplane connectors. The messages provide configuration data as well as a heartbeat which is transmitted by each controller every 500 ms. If a controller does not receive a heartbeat within one second, it assumes the peer controller has become inoperable and begins failing over.

If the controllers cannot exchange messages due to communication problems over the backplane, they will break the connection and each controller will switch to a stand-alone mode.

2.8.3 Failover

Failover describes the process of transferring data from a failed controller to a survivor and completing any active tasks. When one controller begins the failover process, it sends a reset to the other controller, which prevents the failing unit from processing any more information and enables any host ports that are

passive. It then downloads the failed controller’s cache to its unused portion of cache and begins acting upon that data.

While downloading the data, the controller responds to I/O by disconnecting (if allowed) and waiting approximately three seconds before reconnecting and presenting a B USY status. The delay is to prevent host operating systems from seeing too many errors and fencing off the controller.

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RAID Array 3000 Controller Shelf

2.9 Environmental

The controller incorporates a set of on board sensors to detect abnormal operating conditions that may affect data safety.

2.9.1 Backup Power Management

The controller must be connected to the Uninterruptable power supply (UPS) to prevent the subsystem cache from being corrupted during unexpected losses of power. If no backup power supply is provided, the controller will remain off-line and reject all I/O requests with a status of Check Condition/Hardware Error.

During normal operation, RAID 3000 ac power is supplied from a line source through both power cords to both power supplies. Conditions of poor or no power causes the fol l owi ng UPS re sponse s:

Table 2–5 Response to Various AC Power Condi t ions

Condition Response

Low line vol tage UPS compensation circuit automatically increases out-

put volt age, without placing load on the UPS bat tery.

No line vol tage (AC loss)

UPS low-batt ery warning UPS signals RAID 3000 cont roller of impending power

UPS power down UPS shuts itself off, preventing complete battery dis-

UPS switches to the bat tery which supplies power to the RAID 3000 maintaining full functional ity.

UPS signals RAID 3000 contr oller of im pending power down. Caching is disabl ed but the RAID 3000 continues to service host requests and begins to flush cache to disk.

down. Subsystem discontinues host ser vices. Cache flush is completed.

charge. All data has been wr itten to di sk.

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Installation and Maintenance

This chapter describes how to install the Controller Shelf in a RETMA or metric-style storage cabinet and then make the cable connections to the UPS, Device Expansion Shelves and host system. The maintenance section describes how to interpret t he status of the LEDs on the front panel of the Controller Shelf. The chapter also describes how to replace a Field Replaceable Unit (FRU).

3.1 Installation Guidelines

The Controller Shelf installation process consists of mounting the support brackets for the specific number of shelves in your subsystem configuration, setting the UltraSCSI bus termination a nd t arge t ID addresses, a nd ma ki ng the power and SCSI cable connections between the rackmount components. The section is divided into four separate cabling procedures, one for each of the number of Device Expansion Shelves in your specific subsystem configuration.

CAUTION

To pr event the p ossi ble los s of data, always shu tdown your subsystem from the StorageWorks Command Console (SWCC). Do not turn off sys-

tem power before

shutdown is issued from SWCC, t he controller first flushes the cache to the disk drive, then stops blinking.

Use the following guidelines when installing the Controller and Device Expansion Shelves. They apply to both RETMA and metric cabinet designs.

• For stability and safety, arrange the components in the cabinet using a bot-

tom-up approach.

• Cable length is critical when locating the shelves in the cabinet. Keep

shelves grouped together to minimize cable length problems.

EK–SMCPQ–UG. C01 3–1

shutdown

is issued. When

RAID Array 3000 Controller Shelf

Install the UPS below the she l v e s and as low a s p ossible in the cabinet.

•

Ensure there is a approximate two-inch gap between the bottom of the con-

•

troller shelf and the UPS to allow cable routing between the front panel connectors and connectors at the back of the units.

3.2 Installing Shelves in the Cabinet

Determining the best location to install the Controller and Device Expansion Shelves in the cabinet de pends on the num ber of e xpa nsion shelve s in your sub-

system configuration. The shelves should be grouped as shown Figures 3–1 through 3–4. Figure 3–1 shows a single Device Expansion Shelf installation. Figures 3–2, 3–3, and 3–4 show a two, three, and four shelf installation, respectively.

Install the UPS at the bottom of the cabinet with t h e su bsy stem shelves directly above. The host system (not shown) can reside between the UPS and th e su bsy stem shelf group.

Note that the Controller Shelf in each figure is located directly below the first Device Expansion Shelf. This minimizes the distance between the connectors to enable the 0.5 meter SCSI cable connections between the modules in the Controller Shelf and each Device Expansion Shelf.

NOTES

• The distance between shelves should not exceed one 1.5 inches.

• Because of power cord lengths, the distance betw een the las t Dev ice E xpans ion Shel f at t he top of a shel f gr ou p and t he U PS sh oul d n ot exceed 45 inches.

The target SCSI bus addresses of the drives in the Device Expansion Shelves (shown on each storage device in Figures 3–1 through 3–4) are controlled by a switch on the side of the personality I/O module in each expansion shelf. In a single expansion shelf configuration, the IDs are 0–5. In a double expansion shelf configuration, the IDs in both expansion shelves are also 0–5 because each shelf is connected to a separate device I/O bus from the controller.

In a three and four-shelf configuration (Figures 3–3 and 3–4, respectively), the second expansion shelf on each device I/O bus is connected to the first via a Trilink adapter a nd m ust be set t o 8–13.

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Chapter 3. Installation and Maintenance

096

Figure 3–1 Recommended Si ngl e Expansi on Shel f Installation

P / S

Device

Expansion

Shelf

Controller

Shelf

UPS

HR-1

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RAID Array 3000 Controller Shelf

Figure 3–2 Recommended Cont r ol ler Shelf Installation (Tw o Expansi on

Shelves)

433221100

HR-1

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098

Figure 3–3 Recommended Cont roller Shelf Inst al l at ion (Three Expansion Shelves)

P / S

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/ S

P / S

HR-1

RAID Array 3000 Controller Shelf

099

Figure 3–4 Recommended Installati on ( Four Expansion Shelves)

P / S

3–6 EK–SMCPQ–UG. C01

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Chapter 3. Installation and Maintenance

3.2.1 Installing Shelf Supports

After you determine the desired shelf slot locations in your cabinet, install the shelf support mounting kits supplied with the shelves. Shelf support mounting kits for the RETMA and metric style cabinets are included with each shelf assembly. T he UPS i s ra c k m ount e d usi ng c ust om a dj u st a bl e r ail brackets. Table

3–1 lists the shelf support mounting kit s and i dent i fie s the docum e nts and proc e dures that contain the instructions needed to install them.

Table 3–1 Shelf Support Mounting Kits and Installation G uides

Cabinet Styl e Shelf Support

Kit Part No.

RETMA Cabinet Installation (round hole).

RETMA Cabinet Installation (square hole).

Metric Cabinet Ins tallation BA35X-RD

UPS Installation into a RETMA or Metric Cabinet

70-33381-01 See Section 3.2.1.1.

70-33381-01 See Section 3.2.1.2.

74-53154-01/02 (plus har dware)

Installation Guide/Part No.

SW500 and SW800 Cabinet Metric Shelf Bracket Kit Installa-

tion Guide ( EK–35XRD–ID)

See Section 3. 2.2 below.

3.2.1.1 Installing Shelf Supports in a RETMA Cabine t ( Ro und H o l e )

Use the following procedure to install the shelf support kit into a RETMA cabi-

net with round holes in the mounting rails (see Figure 3–5).

1. Open the kit and ensure it contains the items listed in Table 3–2.

Table 3–2 RETMA Cabinet Shelf Suppor t Par ts List

Item Part Number Description Qty.

1 74-46419-01 Shelf Retainer Bracket, (0.25 inc h) 4 2 74-46419-02 Shelf Retainer Bracket, (1.50 inc h) 2 3 74-48220- 01 Shelf Support – BA350- SA 1

4 74-48220-02 Shelf Support – BA350- SA 1 5 74-48223-01 Nut Plate 2 6 74-50250- 01 Support Bracket – BA350-24/U 1 7 90-00063-37 Screw – 10 x 32 14 8 90-06565- 00 Nut – 10 x 32 2

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RAID Array 3000 Controller Shelf

2. Determine the mounting location in your cabinet.

3. Install the left shelf support by aligning the bracket and cabinet rail holes and then securing the support to the cabinet using two screws (item 7, Figure

3–5). Do not tighten screws.

4. Install the nut plate (item 5, Figure 3–5) behind the left rail and secure with three screws. Tighten all five screws.

5. Repeat steps 2, 3, and 4 to install the right shelf support in the cabinet.

6. Install the support bracket (item 6, Figure 3–5) by securing the bracket studs with two plate nuts (item 8, Figure 3–5).

7. Install a shelf retainer bracket (item 1, Figure 3–5) in the rear slot of the left shelf support and secure with two screws.

8. Repeat step 7 to secure a shelf retainer bracket to the right shelf support.

9. Place the Controller Shelf on the cabinet shelf supports and slide the shelf completely to the rear of the cabinet.

10. Install two shelf retainer brackets (item 1, Figure 3–5) to the left and right rails of the cabinet and secure with two screws. The Controller Shelf is now safely mounted in the cabinet.

3.2.1.2 Installing Shelf Supports in a RETMA Cabine t ( Squa r e Hole)

Use the following procedure to install the shelf supports into a RETMA cabinet with square holes in the mounting rails (see Figure 3–5).

1. Open the kit and ensure it contains the items listed in Table 3–2.

2. Retrieve six washers (part no.: 90-06664-00) from ge ne ral pa cka gi ng.

3. Determine the position of the shelf supports in the cabinet.

4. Install the left shelf support by aligning the support and cabinet rail holes and then securing the support to the cabinet using three screws (item 7, Figure 3–5) and washers. Tighten the scre ws.

5. Repeat steps 3, and 4 to install the right shelf support in the cabinet. Align the support with the left uni t and t i ghte n t he scre ws.

6. Install the support bracket (item 6, Figure 3–5) by securing the bracket studs with two plate nuts (item 8, Figure 3–5).

7. Install a shelf retainer bracket (item 1, Figure 3–5) in the rear slot of the left shelf support and secure with two screws.

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Chapter 3. Installation and Maintenance

8. Repeat step 7 to secure a shelf retainer bracket to the right shelf support.

9. Place the Controller Shelf on the cabinet shelf supports and slide the shelf completely to the rear of the cabinet.

10. Install two shelf retainer brackets (item 1, Figure 3–5) to the left and right

rails of the cabinet and secure with two screws. The Controller Shelf is now safely mounted in the cabinet.

Figure 3–5 RETMA Cabinet Shel f Suppor t s

3.2.2 Installing UPS Brackets

The shelf brac ke t s t ha t support and se c ure t he UPS i n t h e ca b i ne t a re a c ust om design. The following procedure describes how to install the rack-mount brack-

ets. It applies to both cabinet designs – RETMA and metric. You will need the following items to properly install the UPS brackets in your style c a bi n e t:

2 UPS rack-mount bracket s (74-53154-01 and -02)

•

• 1 Bag (Table 3–3 l i sts conte nt s) of mounti ng ha rdware (99-06557-05)

• Phillips-head screwdriver

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RAID Array 3000 Controller Shelf

Table 3–3 UPS Rack-mount Bracket M ount ing Hardware List

Cabinet Styl e Hardware It em Part Number

RETMA (round hole) Screw 90-00063-39

U-Nut 90-07786-00

RETMA (square hole) Screw 90-40331-01

Cage Nut 90-11476-01 Washer 90-0664-00

Figure 3–6 shows the le ft a nd ri ght -ha nd UPS brac k e t a sse m blies. Figures 3–7 and 3–8 illustrate the front and rear bracket mounting holes for both cabinet designs. Refer to these figures throughout the bracket installation procedure.

1. Determine the mounting location in your cabinet (bottom of cabinet recommended for stability).

2. Install U-nuts (or cage nuts depending on cabinet style) corresponding to the “E” holes for RETMA cabinets or “M” holes for metric cabinets (see Figure 3–7).

3. If installing into a RETMA cabinet, align the left-hand bracket “E” holes with the corresponding holes in the cabinet (extend rear of bracket beyond rail for installation), insert two screws, and secure wit h to c a bine t with a c age nut or U-nut.

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Figure 3–6 UPS Rack-mount Bracket Assemblies

Chapter 3. Installation and Maintenance

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

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RAID Array 3000 Controller Shelf

4. Pull and extend the rear bracket assembly until it reaches the hole mounting channel at the rear of the cabinet and install cage nuts (or U-nuts) at the rear of the rail

into the corresponding holes in t he ca bi net (see Figure 3–7). E xt end t he brac ke t be yond rail and tighten the hardware to secure the bracket to the cabinet.

5. Install the UPS right-hand b r a c k e t on the right side o f the cabinet usin g t h e sa me hole patterns and hardware used in steps 2 and 3.

6. Ensure both brackets are level and tighten all hardware.

7. Carefully lift and inse r t t h e UPS o n t o t h e b rackets a n d p u sh the unit b a c k i n t o t h e cabinet until the mounting holes in each flange aligns with the corresponding holes in the cabinet.

8. Secure the front pa ne l of th e UPS t o t he c a bi ne t (se e Fi gure 3–8 for c orr ect holes) using two SST flat-washers and screws.

9. Connect the UPS power cord to the ac powe r stri p.

Figure 3–8 UPS Bracket RETMA and Metri c Hole Locat ions (Rear)

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3.3 Power and SCSI Cable Connection Procedures

This section contains the power and SCSI cabling procedures for a single or multiple Device Expansion Shelf subsystem installation. Each procedure describes how to connect the Controller Shelf to the Device Expansion Shelve(s), the host system, the UPS, and the maintenance PC. Your Controller and Device Expansion shelf shipment contains all of the power, serial control, and SCSI data cables required to connect and configure your system. These cables, along with two Trilink adapter connectors allow you to create a single or multiple storage

subsystem as shown in Figures 3–1 through 3–4. The section is divided into four procedures that describe how to connect a single

or multiple-shelf configuration. Each is supported by a wiring diagram and is independent of the other three. Proceed to the procedure that applies to the number of Device Expansion Shelves you are connecting to the Controller Shelf.

NOTE

All four cabling procedures describe how to connect your subsys tem to a single host via the host I/O module 0 connector on the Controller Shelf. The procedures are the same for host I/O module 1. Also, no connections are shown to the Host connector on the I/O module. This connector is electrically the same as mid-bus connections in a multiple-host configuration.

Host In

and is used for

Out

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RAID Array 3000 Controller Shelf

3.3.1 SCSI Bus Target Addresses and Termination

NOTE

The SCSI bus address switch on the Controller Shelf device I/O module has been disabled. It does aff ect or c ontr ol the S C SI b u s ad d r ess es of th e d evices in the Device Expansion Shelves. The target addresses of the disk drives are set by address switch S 3 on the personalit y module in each Device Expansion Shelf.

The SCSI bus device address and termination switches should be set before connecting the SCSI cables between the Controller and Device Expansion Shelves. The SCSI bus addresses of the devices in each Device Expansion Shelf is set by address switch (S3) on the side of the personality I/O module in each shelf.

The SCSI bus termination on each device bus is set by the SCSI bus termination switch (S4) on the device I/O module of the Controller Shelf and the Personality I/O module on each Device Expansion Shelf.

The correct SCSI bus ID addresses and termination switch settings for single and multiple Device Expansion Shelf installations are shown on the diagrams that support the four following cabling proc e dures.

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3.3.2 Cabling a Single Device Expansion Shelf Subsystem

(See Figures 3–9 and 3–10)

1. Ensure the physical installation phase of installing and securing shelf brackets and sh e lves (inc l u d i n g the UPS) has been accomplished and that the shelves are secured within the shel f brac ke t t he shelf l oc k provide d.

2. Remove the device I/O module from the Controller Shelf and ensure the switch positions of SCSI bus termination switch S4 are set as shown in Fig-

ure 3–9. Replace the module in the Controller Shelf.

3. Remove the personality I/O module from the Device Expansion Shelf and set SCSI bus termination switch S4 on this module as shown in Figure 3–9.

4. Ensure SCSI bus address switch S3 on the personality I/O module is set for the device addresses as shown in Figure 3–9. Replace the module in the Device Expansion Shelf.

5. Connect the black ac power cords (supplied with the shelves) from the ac power source to the outside power supply on each shelf (see Figure 3–10).

6. Connect the gray power cables from the inside power supply on each shelf to the power receptacles on the back of the UPS (ensure the UPS is connected to an ac source).

7. Connect a 0.5-meter SCSI cable (BN37A-0E) from the top SCSI connector on the Controller Shelf device I/O module (device bus 1) and the SCSI connector on the front of the personality I/O module on the Expansion Shelf.

8. Connect a 5-meter SCSI cable (BN37A-05) between the host-in connector on the Controller Shelf host 0 I/O module (bottom connector) and the corresponding connector on the host system.

9. Connect the maintenance serial control cable (17-04730-01) from the CTR 0 connector on the Controller Shelf host 0 I/O module to the corresponding connector on the maintenance PC.

10. Connect the UPS serial control cable (17-04729-01) from the UPS connector Controller Shelf host 0 I/O module to the like connector on the UPS.

11. Install jumper connector 12-49700-01 to the Controller Shelf UPS connector on the host 1 I/O module.

To prevent possible damage to the equipment, the input voltage level of the UPS must be set to your sp ec i f i c l in e v ol t ag e b ef or e p roceed i n g. Refer to th e UPS manual and set the input level to your ac power source(s).

CAUTION

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RAID Array 3000 Controller Shelf

12. After the UPS ha s be e n se t t o t h e c orrect input voltage level, set the UPS low-battery warning option to five minutes (refer to UPS manual for instructions).

13. This completes the Controller and Device Expansion Shelf cabling procedure. Dress and ty-wrap related cable groups, and then refer to the RAID Ar-

ray 3000 Getting Started and Command Console Installation and User Guides for information describing how to setup and configure your subsys-

tem.

Figure 3–9 Controll er / Si ngl e Devi ce Expansi on Shel f Cabl i ng Di agr am

OFF

ON 1 2 3 4

SCSI Bus Termination Switch ( S4)

DEVICE EXPANSION SHELF # 1

P/SAP/S

CONTROLLER SHELF

P/S

Host 0 I/O

Module

CTR 0

Personality I/O

Module

Device

I/O Modu le

SCSI Cable

BN37A-05

ON OFF

SCSI Cab le

BN37A-0E

Serial Control

Cable

(17-04730-01)

To Host System

1234567

SCSI Bus Address

Switch (S3)

Maintenance

OFF 1 2 3 4

SCSI Bus Termination Switch (S4)

HR-1117

3–16 EK–SMCPQ–UG. C01

Figure 3–10 AC Power Wi r ing Diagram

Devi ce E xpansion

Shelves 2, 3, and 4

DEVICE EXPANSION SHELF #1

P/SAP/S

Chapter 3. Installation and Maintenance

CONTROLLER SHELF

P/S

Gray Power Cords

Receptacles

P/S

AC Power

UPS

Black Power Cords

Host 0 I/O

Module

UPS

UPS Control

(17-04729-01)

AC Power

Source

HR-111

EK–SMCPQ–UG. C01 3–17

RAID Array 3000 Controller Shelf

3.3.3 Cabling a Two Device Expansion Shelf Subsystem

(See Figures 3–10 and 3–11)

2. Remove the device I/O module from the Controller Shelf and ensure the switch positions of SCSI bus termination switch S4 are set as shown in Fig-

ure 3–9. Replace the module in the Controller Shelf.

3. Remove the personality I/O module from Device Expansion Shelf # 1 and set SCSI bus termination switch S4 and SCSI bus address switch S3 on this module as shown in Figure 3–11.

4. Remove the personality I/O module from Device Expansion Shelf # 2 and repeat step 3.

5. Connect the black ac power cords (supplied with the shelves) from the ac power source to the outside power supply on each shelf (see Figure 3–10).

6. Connect the gray power cables from the inside power supply on each shelf to the power receptacles on the back of the UPS (ensure the UPS is connected to an ac source.

8. Connect a second 0.5-meter SCSI cable (BN37A-0E) from the bottom SCSI connector on the Controller Shelf device I/O module (device bus 2) and the SCSI connector on the front of the personality I/O module on the Device Expansion Shelf # 2.

9. Connect a 5-meter SCSI cable (BN37A-05) between the host-in connector on the Controller Shelf host 0 I/O module (bottom connector) and the corresponding connector on the host system.

10. Connect the maintenance serial control cable (17-04730-01) from the CTR 0 connector on the Controller Shelf host 0 I/O module to the corresponding connector on the maintenance PC.

11. Connect the UPS serial control cable (17-04729-01) from the UPS connector Controller Shelf host 0 I/O module to the like connector on the UPS.

12. Install jumper connector 12-49700-01 to the Controller Shelf UPS connector on the host 1 I/O module.

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Chapter 3. Installation and Maintenance

Figure 3–11 Controll er / Two Device Expansion Shelf Cabl i ng Di agr am

DEVICE EXPANSION SHELF # 2

P/S

DEVICE EXPANSION SHELF # 1

P/S

CONTROLLER SHELF

P/S

Personality I/O

Host 0 I/O

Module

CTR 0

Module

Per sonalit y I/O

Module

Device

I/O Module

SCSI Cable

BN37A-05

Serial Control

Cable

(17-04730-01)

To Host System

OFF

2 3 4

SCSI Bus Ter mination Switch (S4)

ON OFF

1234567

SCSI Bus Address

Switc h (S3)

SCSI Cable

BN37A-0E

Maintenance

HR-111

EK–SMCPQ–UG. C01 3–19

RAID Array 3000 Controller Shelf

CAUTION

13. After the UPS ha s be e n se t t o t h e c orrect voltage level, set the UPS lowbattery warning option to five minutes (refer to UPS manual for in struc tions).

14. This completes the Controller and Device Expansion Shelf cabling procedure. Dress and ty-wrap related cable groups, and then refer to the RAID Ar-

ray 3000 Getting Started and Command Console Installation and User Guides for information describing how to setup and configure your subsys-

tem.

3–20 EK–SMCPQ–UG. C01

Chapter 3. Installation and Maintenance

3.3.4 Cab ling a T hree Device Exp a n s ion Sh el f Subsystem

(See Figures 3–10 and 3–12)

2. Remove the device I/O module from the Controller Shelf and ensure the switch positions of SCSI bus termination switch S4 are set as shown in Fig-

ure 3–9. Replace the module in the Controller Shelf.

3. Remove the personality I/O module from Device Expansion Shelf # 1 and set SCSI bus termination switch S4 and SCSI bus address switch S3 on this module as shown in Figure 3–12.

4. Remove the personality I/O modules from Device Expansion Shelves # 2 and # 3 repeat step 3.

5. Connect the black ac power cords (supplied with the shelves) from the primary ac power source to the outside power supply on each shelf (see Figure 3–10).

6. Connect the gray power cables from the inside power supply on each shelf to the power receptacles on the back of the UPS (ensure the UPS is connected to a secondary ac source.

7. Connect the single-connector end of a Trilink adapter to the SCSI connector on the personality module in Device Expansion Shelf # 1. Tighten the screws on the adapter to ensure it is firmly seated.

8. Connect a 0.5-meter SCSI cable (BN37A-0E) from one connector on the adapter to the top SCSI connector (device bus 1) on the front of the Controller Shelf device I/O module.

9. Connect a second 0.5-meter SCSI cable (BN37A-0E) from the other connector on the adapter to the SCSI connector on the front of the personality I/O module on the Device Expansion Shelf # 3.

10. Connect a third 0.5-meter SCSI cable (BN37A-0E) from the bottom SCSI connector on the Controller Shelf device I/O module (device bus 0) to the SCSI connector on the front of the personality I/O module on the Device Expansion Shelf # 2.

11. Connect a 5-meter SCSI cable (BN37A-05) between the host-in connector on the Controller Shelf host 0 I/O module (bottom connector) and the corresponding connector on the host system.

12. Connect the maintenance serial control cable (17-04730-01) from the CTR 0 connector on the Controller Shelf host 0 I/O module to the corresponding connector on the maintenance PC.

EK–SMCPQ–UG. C01 3–21

RAID Array 3000 Controller Shelf

Figure 3–12 Controll er / Three Device Expansion Shelf Cabl i ng Di agr am

OFF ON 1 2 3

DEVICE EXPANSION SHELF # 3

P/S

DEVICE EXPANSION SHELF # 2

P/S

DEVICE EXPANSION SHELF # 1

P/S

Personal i ty I/O

Module

Personal i ty I/O

Module

Personality I/O

Module

TRI

Link

SCSI Bus Termination Switch (S4)

OFF

ON 1 2 3 4

SCSI Bus Termination Switch (S4)

OFF

ON 1 2 3 4

SCSI Bus Termination Switch (S4)

OFF

1234567

SCSI Bus Address

Switch (S3)

OFF

1234567

SCSI Bus Address

Switch (S3)

OFF

1234567

SCSI Bus Address

Switch (S3)

SCSI Cable

BN37A-0E

CONTROLLER SHELF

P/S

Host 0 I/O

Module

CTR 0

Device

I/O Module

SCSI Cable

BN37A-05

Serial Control

Cable

(17-04 73 0-01)

To Host System

Maintenance

HR-111

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Chapter 3. Installation and Maintenance

13. Connect the UPS serial control cable (17-04729-01) from the UPS connector Controller Shelf host 0 I/O module to the like connector on the UPS.

14. Install jumper connector 12-49700-01 to the Controller Shelf UPS connector on the host 1 I/O module.

CAUTION

15. After the UPS ha s be e n se t t o t h e c orrect input voltage level, set the UPS low-battery warning option to five minutes (refer to UPS manual for instructions).

16. This completes the Controller and Device Expansion Shelf cabling procedure. Dress and ty-wrap related cable groups, and then refer to the RAID Ar-

ray 3000 Getting Started and Command Console Installation and User Guides for information describing how to setup and configure your subsys-

tem.

EK–SMCPQ–UG. C01 3–23

RAID Array 3000 Controller Shelf

3.3.5 Cabling a Four Device Expansion Shelf Subsystem

(See Figures 3–10 and 3–13)

2. Remove the device I/O module from the Controller Shelf and ensure the switch positions of SCSI bus termination switch S4 are set as shown in Fig-

ure 3–9. Replace the module in the Controller Shelf.

3. Remove the personality I/O module from Device Expansion Shelf # 1 and set SCSI bus termination switch S4 and SCSI bus address switch S3 on this module as shown in Figure 3–13.

4. Remove the personality I/O modules from Device Expansion Shelves # 2, # 3, and # 4 and repeat step 3.

5. Connect the black ac power cords (supplied with the shelves) from the primary ac power source to the outside power supply on each shelf (see Figure 3–10).

6. Connect the gray power cables from the inside power supply on each shelf to the power receptacles on the back of the UPS (ensure the UPS is connected to a secondary ac source.

8. Connect the single-connector end of a second Trilink adapter to the SCSI connector on the personality module in Device Expansion Shelf # 2. Tighten the screws on the adapter to ensure it is firmly seated.

9. Connect a 0.5-meter SCSI cable (BN37A-0E) from one connector on the adapter connected to shelf # 1 to the top SCSI connector (device bus 1) on the front of the Controller Shelf device I/O module.

10. Connect a second 0.5-meter SCSI cable (BN37A-0E) from the other connector on the adapter connected to shelf # 1 to the SCSI connector on the front of the personality I/O module on the Device Expansion Shelf # 3.

11. Connect a third 0.5-meter SCSI cable (BN37A-0E) from the one connector on the adapter connected to shelf # 2 to the bottom SCSI connector (device bus 0) on the front of the Controller Shelf device I/O module.

12. Connect a fourth 0. 5-meter SCSI cable (BN37A-0E) from the other connector on the adapter connected to shelf # 2 to the SCSI connector on the front of the personality I/O module on the Device Expansion Shelf # 4.

3–24 EK–SMCPQ–UG. C01

Chapter 3. Installation and Maintenance

Figure 3–13 Controll er / Four Device Expansion Shelf Cabl ing Diagram

DEVICE EXPA NSION SHELF # 4

P/S

DEVICE EXPA NSION SHELF # 3

P/S

DEVICE EXPA NSION SHELF # 2

P/S

DEVICE EXPA NSION SHELF # 1

P/S

Person al it y I/O

Module

Person al it y I/O

Module

Personality I/O

Module

Personality I/O

Module

TRI

Link

TRI

Link

OFF ON 1 2 3 4

SCSI Bus Termina tion Switch (S 4)

SCSI Cable

BN37A-0E

OFF

ON 1 2 3 4

SCSI Bus Termina tion Switch (S 4)

ON OFF

1234567

SCSI Bus Address

Switch (S 3)

OFF

1234567

SCSI Bus Address

Switch (S 3)

SCSI Cable

BN37A-0E

CTR 0

Device

I/O Module

SCSI Cable

BN37A-05

Serial Contro l

Cable

(17-04730-01)

To Host System

Maintenance

HR-112

CONTROLLER SHELF

P/S

Host 0 I/O

Module

EK–SMCPQ–UG. C01 3–25

RAID Array 3000 Controller Shelf

13. Connect a 5-meter SCSI cable (BN37A-05) between the host-in connector on the Controller Shelf host 0 I/O module (bottom connector) and the corresponding connector on the host system.

14. Connect the maintenance serial control cable (17-04730-01) from the CTR 0 connector on the Controller Shelf host 0 I/O module to the corresponding connector on the maintenance PC.

15. Connect the UPS serial control cable (17-04729-01) from the UPS connector Controller Shelf host 0 I/O module to the like connector on the UPS.

16. Install jumper connector 12-49700-01 to the Controller Shelf UPS connector on the host 1 I/O module.

CAUTION

17. After the UPS ha s be e n se t t o t h e c orrect input voltage level, set the lowbattery warning option to five minutes (refer to UPS manual for in struc tions).

18. This completes the Controller and Device Expansion Shelf cabling procedure. Dress and ty-wrap related cable groups, and then refer to the RAID Ar-

ray 3000 Getting Started and Command Console Installation and User Guides for information describing how to setup and configure your subsys-

tem.

3–26 EK–SMCPQ–UG. C01

Chapter 3. Installation and Maintenance

063

3.4 Controller Shelf Status LEDs

The Controller Shelf is equipped with two front-panel L E Ds (see Figure 3–14) that monitor the following error conditions:

A shelf blower that is not operating

•

An over-temperature condition

•

A dc power problem

•

External fault conditions

•

Controller faults

•

When the shelf is operati ng prope rly, t he gree n powe r LED is on and the amber shelf fault LED is off. If a dc power problem develops, the power LED goes out indicating a malfunction.

The amber shelf status LED is normally off. If an error condition occurs, the LED comes on and an audible alarm sounds notifying the operator that an error condition exists. Once t he user ha s bee n noti fi ed a nd i s aware of a n e rror, the alarm disable toggle switch enables the operator to disable the audible alarm by using the switch.

Figure 3–14 Shelf Status LEDs

Fault LED

(Amber)

DC P owe r

LED (Green)

HR-1

EK–SMCPQ–UG. C01 3–27

RAID Array 3000 Controller Shelf

3.5 Controller LEDs

The LEDs on the front panel of the controller monitor host and disk channel activity and a controller fault condition. The reset button/LED flashes green approximately once every second (heartbeat) to indicate that the controller is oper-

ating normally. Figure 2–3, Chapter 2, identifies the LEDs. Table 2–1 describes their functions.

3.6 Rep l aci ng Components (FRU’s)

This section describes how to replace an FRU in the RAID Array 3000 controller shelf. The information is divided into the following subsections:

Replacing a Host I/O or Device I/O SBB in the controller shelf

•

Replacing a shelf power supply SBB

•

Replacing the RAID controller

•

Replacing the UPS

•

Replacing a blower

•

Replacing a controller memory cache module

•

NOTE

The r ack - moun t U PS is als o f ield rep laceab le. Re-

fer to the user’s guide supplied with the unit for the order number and instructions of how to replace it.

Figure 3–15 is an exploded view that shows the Field Replaceable Units in the controller shelf. Table 3–4 lists the units and their corresponding part numbers.

3–28 EK–SMCPQ–UG. C01

Chapter 3. Installation and Maintenance

Figure 3–15 Controll er Shel f Field Replaceable Units

HR-1

Table 3–4 Controller Shel f Field Replaceable Units

Item Qty. Part Number Descripti on

1 2 30-48191-04 Power Supply, 180 W , 50/60 Hz, +5 V, +12V, 2 1* 70-33523-01 RAID Controller 3 2 70-33525--01 Host I/O M odule 4 1 70-33067-05 Device I/O Module 5 2 70-29761-07 Blower Ass em bly

* Second (redundant) controller is optional

EK–SMCPQ–UG. C01 3–29

RAID Array 3000 Controller Shelf

3.6.1 Replacing a Host or Device I/O SBB

CAUTION

When you remove an SBB, the ai rf low t hrough t he shelf is reduced. Always install the replacement unit immediately to prevent overheating.

1. Ensure the SCSI bus connected to the SBB is quiescent (no I/O activity).

2. Disconnect the cables (or jumper) from the front panel of the SBB.

3. Release the SBB from the shelf slot by squeezing the mounting tabs on the SBB together and pulling it forward until clear of the shelf (Figure 3–16).

4. Insert an identical model SBB in the slot and push it in until an audible click is heard indicating the SBB is fully seated (SBB front panel mounting tabs expand and engage the shel f).

5. Observe that the SBB status LEDs are operating.

6. Reconnect the cables and jumper (if installed on the original module).

Figure 3–16 Replacing the Host I/O SBB

SHR-103

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Chapter 3. Installation and Maintenance

3.6.2 Replacing a Power Supply SBB

CAUTION

When you remove a power supply, the airflow through the s helf i s r educ ed. Al way s i ns tal l t he r eplacement unit immediately to prevent overheating.

You can replace a dc power supply without affecting shelf operation using the following procedure:

1. Remove the ac input power c abl e from t he shelf power supply.

2. Squeeze the mounting tabs to release the unit and pull it out of the shelf.

3. Insert the replacement power supply into the shelf slot, align the guide slots, and then push it in until the SBB tabs lock into place.

4. Connect the input power cable to the power supply ac receptacle.

5. Observe the LEDs on the replacement power supply and ensure that the unit is operating properly.

6. If the shelf power is removed during power supply replacement, the controller must place the storage devices on-line sequentially at four-second intervals. Make sure the L EDs on both the power supply a nd the stora ge de vices indicate normal operation.

EK–SMCPQ–UG. C01 3–31

RAID Array 3000 Controller Shelf

3.6.3 Replacing the RAID Controller

CAUTION

When you remove the controller, the airflow through the s helf i s r educ ed. Al way s i ns tal l t he r eplacement unit immediately to prevent overheating.

1. Ensure the SCSI bus connected to the SBB is quiescent (no I/O activity).

2. Grip the two locking latches on the front panel of the controller and pull them forward until the controller disengages from its mounting slot (Figure

3–17).

3. Transfer the SIMM(s) to the new controller.

4. Remove the controller by sliding it forward and free of the shelf.

5. Insert the replacement controller into the open slot, align the module into the card guides, and gently slide it into the shelf until the connector engages the backplane connector in the shelf.

6. Turn the two front panel latches inward to seat the controller in the shelf slot.

7. Restore the configuration using SWCC.

Figure 3–17 Removing the Control ler from the Shelf

HR-1

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Chapter 3. Installation and Maintenance

3.6.4 Replacing the UPS

Proceed as follows to replace the UPS:

1. Ensure t h e UPS p ower switch is set to off.

2. Disconnect the shelf power cords from the rear receptacles on the UPS.

3. Disconnect the UPS power cord from the wall outlet.

4. Disconnect the serial control cable from the controller shelf.

5. Remove the sc re ws t ha t se cure t h e front pa ne l of t he UPS t o t h e c a b in e t .

6. Install the replacement UPS and replace the screws removed in step 5 to secure the unit.

7. Reconnect the power cords and the serial control cable.

8. Set the UPS o utput voltage level to your specific ac power source.

9. Set the UPS p ower switch to on, set the UPS low-battery warning option to five minutes (refe r t o UPS m a nua l) , a nd th en power-up t he she l f.

3.6.5 Replacing a Blower

WARNING

Only qualified s ervice pers onnel s hould acc ess t he rear of the shelf to replace a blower.

The controller shelf has two blowers mounted on the rear. Connectors on the backplane provide the +12 Vdc to operate the blowers. When a blower fails, the shelf status (amber) LED on the power supply SBB is OFF and an error message is passed to the controller or host via the shelf status signal. The Device I/O assembly status LEDs indicate which blower has failed and then automatically switches the remaining blower to high speed. Refer to the SBB I/O Module User’s Guide (Part No.: EK-SBBIO-UG) supplied with the device expansion shelf for additional LED and blower status information.

Use one of the following procedures to replace a blower (see Figure 3–18).

CAUTIONS

The bl ower s are du al- s peed dev ic es and sh oul d b e replaced only with identical units.

Shel f air flow i s l ost w h en a b low er is remov ed. Replace immediately or dam age can result.

EK–SMCPQ–UG. C01 3–33

RAID Array 3000 Controller Shelf

If you can access the blowers from the rear of the cabinet, proceed as follows:

1. Use a Phillips-head screwdriver to remove the safety screw in the upper right

corner or lower left corner of t he blower (see Figure 3–18).

2. Press the upper and lower blower mounting tabs together to release the blower.

3. Pull the blower straight out to disconnect it from the shelf power connector.

4. Align the replacement blower connector and push the blower straight in, making sure that both mounting tabs lock in place.

Figure 3–18 Replacing a Blow er Assembl y

5. Insert the safety screw.

6. Verify that the shelf and all SBBs are operating properly by observing the LEDs.

3–34 EK–SMCPQ–UG. C01

Chapter 3. Installation and Maintenance

If you cannot access the blowers from the rear of the cabinet, proceed as follows:

1. Disconnect the cables from the front of the controller shelf and remove the shelf from the cabinet .

2. Use a Phillips-head screwdriver to remove the safety screw in the upper right corner or lower left corner of t he blower.

3. Press the upper and lower blower mounting tabs together to release the blower.

4. Pull the blower straight out to disconnect it from the shelf power connector.

5. Align the replacement blower connector and push the blower straight in, making sure that both mounting tabs lock in place.

6. Insert the Phillips safety screw.

7. Reinstall the shelf and reconnect the cables.

8. Verify that the shelf and all SBBs are operating properly by observing the LEDs.

NOTE

If the blower status LEDs on the Device I/O assem bly ar e not of f and all s helf power s upp lies are operating, the second blower could have failed or the wrong bl ower was replaced.

3.6.6 Repl a ci ng the Control ler Memory Cache Mod u les

The memory cache modules in the RAID controller (see Figure 3–19) are replaced by removing the controller from the shelf to gain access to the modules. Then, place the controller on a flat working surface and proceed as follows:

CAUTION

To prevent an electric al disc harge f rom damaging the S IMM s, al ways wear an E SD wris t str ap c onnected to a suitable ground when handling the memory chips.

EK–SMCPQ–UG. C01 3–35

RAID Array 3000 Controller Shelf

1. Power down the controller shelf first (via SWCC) and then the UPS.

2. Grasp the latches on the front of the controller and pull them forward until the con-

troller disengages from the shelf (see Figure 3–17).

3. Remove the controller from the shelf and place on a flat working surface.

4. Remove the two installed cache memory SIMM modules by releasing the locking clips at each end of the module until it disengages and snaps into an upright position as shown in Figures 3–20 and 3–21.

Figure 3–19 Controll er Cache M odul es

ache Memory

Modules

HR-104

Figure 3–20 Release Locking Cli ps

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Chapter 3. Installation and Maintenance

Figure 3–21 Remove Instal led SIMM Modul es

CAUTION

Ensure the “side 1” side of the two replacement SIMMs is facing toward you when installing the modules in the following step.

5. Installed the two replacement memory modules by aligning the module and connector pins (check ali gnm ent gui de i n c ent e r of modul e ) and ge nt ly pi vot the m od-

ule the main controller board until it snaps into place (see Figures 3–18 and 3–19).

6. Replace the controller into the shelf.

7. Power on th e UPS and shelf and chec k t h e activity LEDs on the front panel of the controller. The reset switch/LED should begin to flash at a half-second rate (heartbeat) and the host activity LEDs should flash.

EK–SMCPQ–UG. C01 3–37

RAID Array 3000 Controller Shelf

Figure 3–22 Inst all Replacement Modul es

Figure 3–23 Pivot Module Down to Secure

3–38 EK–SMCPQ–UG. C01

Second Controller Option

This chapter describes how to install a second RAID controller in the RAID Array 3000 Controller Shelf. The second controller option adds a fail/saf e featur e to your stor age subsyst em. The chapter also contains a procedure describing how to configure the subsystem for dualcontroller operation when only one serial port is available on the host.

4.1 Introduction

The controller option adds a second (redundant) controller unit to your subsystem to preserve the integrity of data should the first controller malfunction. The second controller is installed directly below the existing controller in the bottom controller slot of the RAID Array 3000 controller shelf.

The installation procedure consists of adding two SIMM memory modules to the redundant controller and, depending on the option kit you are installing (see inventory below), one or two SIMM modules to the existing controller. Following the memory upgrade, you must upgrade the firmware in both controllers , seat the devices in their respective controller slots and configure the subsystem to accommodate a redundant controller.

Perform an inventory of the items contained in the second controller kit option. The kit should contain the following:

RAID Array 3000 Controller For optio n kit DS-HSZ22-AA, 3 SIMMs For option kits DS-HSZ22-AB, 4 SIMMs CD with new Firmware Model Label Warranty Card This Guide

EK–SMCPQ–UG. C01 4-1

RAID Array 3000 Storage Subsystem

4.2 Installing the Upgrade

To prevent an electri cal dischar ge from damaging the SIMMs, always wear an ESD wris t or foot st rap connected to a s ui tabl e ground when handl ing t he memor y modules.

You can upgrade your f irmwar e using t he SCSI or net work connec tion met hods. These met hods provi de the fastes t way to upgrade your fir mware. To update your

control ler’s f irmware, proceed as follows.

4.2.1 Save Existing Configuration

CAUTION

NOTE

You must save the subsystem configuration using the StorageWork s Command Console Client (SWCC) before performing the installation procedure. Otherwise, the RAID controller m ay lose y our configuration.

To save your current configuration: Select the Storage pull-down menu from the Toolbar (see Figure 4-1), click on Con-

troller, select Configuration, and then Save.

EK–SMCPQ–UG. C014-2

Figure 4-1. Savi ng t he Exi sting Configuration

Chapter 4. Second Controller Option

A saved configuration screen with a “Save to File” field appears as shown in Figure 4-2. The example in Figure 4-2 shows the file name as c:\config1.

Enter your file name in the “Save to File” field and click on Save.

EK–SMCPQ–UG. C01 4-3

RAID Array 3000 Storage Subsystem

Figure 4-2. Saved Confi gur at ion

4.2.2 Update Firmware

If the systems disk is on the RA3000, firmwar e cannot be upgraded with SWCC. Establ ish a temporar y system disk on a disk drive outside the RA3000 and proceed with these instructions or follow the alternative shown in Section 4.2.2. 2.

CAUTION

4.2.2.1 Update Firmware Using SWCC

Start SWCC and choose SCSI or Netwo r k Co nne ction. From the Storage menu (see Figure 4-3), select Controller, and then select Update Firmware.

Figure 4-3 Update Fi r mware Command

EK–SMCPQ–UG. C014-4

Chapter 4. Second Controller Option

A window will appear (see Figure 4-4) asking you to specify the firmware file that you want to load. This file resides on the CD supplied with the controller kit option. You can easily identify Firm ware software by i t s .fdi extension. Enter the .fdi file name (for example, D:\firmware\xxx.fdi), then click Start Update. Upon completion of the Firmware update, the system will automatically reboot and update the control-

ler’s firmware.

Figure 4-4. Fi r m w ar e Updat e Dialog Box

4.2.2.2 Update Firmware Using Serial Interface

NOTE

Follow this procedure only when the host operating system is installed on the RA3000.

1. Properly shutdown your host system

2. Using either a laptop computer or a computer other than that attached to the RA3000, connect a serial cable between the COM port on that machine and the corresponding serial port (CTR1 or CTR2) for the controller on the RA3000.

3. Start a terminal e mul a tor session. On Windows NT, we suggest t he HyperTerminal emulator. Settings to be used are 9600 baud, 8 bits, No Parity, 1 stop bit, XON/ XOFF.

4. To get the controller's attention, press Escape/& (escape key, shift key, number

7). The controller should respond with a banner stating DEC HSZ22 DEC Monitor Utility, followed by the firmware revision number. You will not actually be using this utility to upgrade the firmware, but knowing that it is operational makes the next step easier.

EK–SMCPQ–UG. C01 4-5

RAID Array 3000 Storage Subsystem

5. Reset the controller by power cycling the RA3000 subsystem. You should see a

"Flash Boot Utility... " banner, followed by instructions to t ype CTRL / C to abort. Press CTRL/C to abort t he l oa d sequenc e . A "FLASH Boot Utility Op- tions" menu should be displayed.

6. Choose menu item (2), Change serial baud rate. Select 38400. When presented with the "Please change your baud rate and press RETURN" message, do so from within HyperTerminal via the File\Properties menu, then c hoose ‘Configure. ..

If there is no response from the utility after changing the baud rate, proceed with Step 6.

7. After changing the baud rate, you may have to close and re-enter HyperTerminal. Press the RETURN key after HyperTermina l resta rt s. You should see the FLASH Boot Utility Option menu again.

8. Select menu item “1) Download new Firmware Image”. Using the Transfer menu in HyperTerminal , c hoose Send Text File and send the firmware. You should see a "Receiving code for System Version <ver>" message, followed by a series of \ | / - characters cycling at the end of the line. At 9600 baud, the download will take between 45-60 minutes. At 38400, it should take around 1012 minutes. At completion, you'll see the FLASH Programming complete message, followed by the FLASH Boot Utility Options menu again.

9. Select item 9, Restart Controller. You'll be instructed to reset the baud rate back to 9600, which you'll aga i n do from t he HyperTe rm ina l File \Properties \Configure... menu. As before, you'll proba bly ha ve to e xi t a nd re start HyperTerminal to get a ny response. Press Enter when Hypert e rmi na l re sta rts.

10. Your firmware should now be upgraded.

4.2.3 Shutdown RA3000

1. Ensure that both host ports are in a quiescent state (no I/O activity).

2. Shut down the Host System.

3. Issue a “shutdown” command from the SWCC Console to the controller shelf.

4. Power

OFF the controller shelf.

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Chapter 4. Second Controller Option

4.2.4 Install Two SIMMs into Second Controller

1. Install two of the SIMM modules into the second controller (make sure all SIMM

modules are of the same type) by aligning the connector pins and inserting the modules into the SIMM module connec t ors as shown in Figure 4-5.

Figure 4-5. I nser t M odul e into SIMM Connector

2. Ensure the module is firmly seated and then gently pivot it toward the controller

board until it snaps into place as shown in Figure 4-6.

Figure 4-6. Pi vot M odul e Down to Seat

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RAID Array 3000 Storage Subsystem

4.2.5 Replace Existing Controller

1. Replace the existing controller (see Figure 4-7 to remove) with the new controller.

Figure 4-7. Rem ove Cont r ol ler from Top Sl ot

HR-1

NOTE

Ensure you i nstall t he new controller in the s ame slot as the exi sti ng cont roller remov ed in s tep 1 abov e. Do not leave t he existing c ontroller in the c ontroller s helf while performing the following step.

2. Power up the system and proceed to the following section to restore the configuration on the new controller.

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Chapter 4. Second Controller Option

4.2.6 Restore Configuration

To restore your configuration to the new controller:

1. Restart SWCC in the “Serial Mode” (refer to your RA3000 Getting Started Guide

for instructions).

2. Select the Storage pull-down menu from the Toolbar, the n c hoose Controller.

3. From the Controller pull-down menu (Figure 4-8), select Configuration, and

then Restore.

Figure 4-8. Rest or i ng Configuration t o New Controller

The saved configuration screen with a “Restore from File” field appears as shown in the example of Figure 4-9.

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RAID Array 3000 Storage Subsystem

Figure 4-9. Restor ed Configuration Exampl e

NOTE

Restoring the configuration in the following step may take up to 5 minutes. Be patient.

4. Enter the file name that you saved in Section 4.2.1 and click on Restore.

4.2.7 Update Firmware on Second Co ntroller

1. After configuration has been restored, update firmware on the second controller. Repeat the procedure in Section 4.2.2.1 or 4.2.2.2.

2. After the configuration has been restored and firmware has been updated, power down the system.

4.2.8 Install Original Controller

1. If installing option kit DS-HSZ22-AA, add the second SIMM to the original controller. If installing option kit DS-HSZ22-AB, replace the existing SIMM with the two remaining SIMMs supplied with the kit. (See Section 4.2.4 for instructions.)

2. Install the second controller into the controller shelf and power up the system. The system is now in the dual-redundant operating mode.

3. Locate the second serial cable that came in the second controller kit. Connect this cable to the second controller serial port on the RA3000 and to COM 2 port and restart SWCC in serial mode. You now have two serial connections.

4. To check that the controller pair is in redundant mode, click on the Controller icon. Properties for both controllers should be visible. Firmware revision of both controllers must be identical. If either controller is shown in gray, refer to your RA3000 Getting Started Guide for more detailed instructions.

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Chapter 4. Second Controller Option

4.3 Configuring a Dual Controller Installation for a Single Serial Port

This section describes how to configure your RA3000 storage system for dual controller operation when only one serial port is available on the host. If required, refer to your Getting Started guide for SWCC installation instructions. The information in this section is divided as follows:

Configuring the RA3000 Storage System for dual-controller operation

•

Connecting to your dual controller storage system using a serial connection

•

Verifying the Controller Operating Parameters

•

4.3.1 Configuring the RA3000 for the Active Mode of Operation

If you are upgrading from a single controller storage system, the installed controller will be in the active/passive mode of operation. To configure the storage system using a single serial connection, the dual controllers must be placed in active/active mode. Perform the procedure to change your storage system from “active/passive” to

“active/active” mode of operation.

1. Shutdown the RA3000 storage system, install the second controller, and restart

the system.

2. Connect the host serial port to the serial port connector on the top controller of

the RA3000.

3. Open an HSZ22 monitor utility terminal session. The terminal settings should be:

9600 BAUD, 8 bits, no pari t y, 1 st op bi t , XON/ XOFF. If prom pt e d for a pa ssword, enter “RAID”.

4. When the terminal session is displayed, press “ESCAPE/&” (key sequence: Esc,

Shift, 7). The controller should respond with banner listing HSZ22 Monitor Util- ity followed by the Firmware revision num be r.

5. Select Setup Parameters from the main menu.

6. Select Rdnt Ctrlr Parameters and change the value of Host I/O Channe l 1 t o

Passive. Press Ctrl-Z to exit.

7. Transfer the serial cable to the serial port on the bottom controller and press

“Ctrl -Z”. When the Monitor Utility screen is displayed, press any key to continue.

8. Select Setup Parameters and then select Rdnt Ctrlr Parameters from the main

menu.

9. Both channels should be displayed as “Passive”. Select the host I/O channel that

was not reconfi gured i n ste p 5 and c ha nge i t s value Active . Press CTRL-Z to exit.

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Compaq PROLIANT 3000 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual