HP StorageWorks 3000 User Manual

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Compaq StorageWorks

™

RAID Array 3000 Controller Shelf Hardware

User’s Guide

Fourth Edition (January 2001) Part Number EK-SMCPQ-UG. D01

Compaq Computer Corporation

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

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

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

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

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

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

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

RAID Array 3000 Controller Shelf Hardware User's Guide Fourth Edition (January 2001) Part Number EK-SMCPQ-UG. D01

Contents

About This Guide

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

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

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

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

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

Symbols in Text....................................................................................................xii

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

Rack Stability......................................................................................................xiv

Getting Help........................................................................................................xiv

Compaq Technical Support...........................................................................xiv

Compaq Website............................................................................................xv

Compaq Authorized Reseller..........................................................................xv

Chapter 1

Product Overview

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

Controller Shelf Features .....................................................................................1-6

Controller Shelf Enclosure ...................................................................................1-6

Shelf Cabinet.......................................................................................................1-8

RAID Array 3000 Controller.........................................................................1-8

Device I/O Module .......................................................................................1-9

Host I/O Module.........................................................................................1-12

Shelf Cooling..............................................................................................1-13

Controller Shelf Power Supplies..................................................................1-14

UPS............................................................................................................1-14

6-Slot Device Expansion Shelf (Optional)..........................................................1-15

Connecting the Controller Shelf to a Host System...............................................1-16

Specifications ....................................................................................................1-21

iv RAID Array 3000 Controller Shelf Hardware User's Guide

Chapter 2

RAID Array 3000 Controller

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

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

Controller Reset and LED Indicators....................................................................2-5

Flexible RAID Set Configuration.........................................................................2-6

Custom Components .....................................................................................2-7

Efficient Write and Read Algorithms.............................................................2-7

RAID Levels Supported.......................................................................................2-9

RAID 0.......................................................................................................2-10

RAID 1.......................................................................................................2-11

RAID 0+1...................................................................................................2-12

RAID 4.......................................................................................................2-14

RAID 5.......................................................................................................2-16

JBOD .........................................................................................................2-17

Redundant Operation.........................................................................................2-17

Initialization ...............................................................................................2-18

Message Passing ......................................................................................... 2-18

Failover ......................................................................................................2-18

Environmental ...................................................................................................2-19

Backup Power Management........................................................................2-19

Chapter 3

Installation and Maintenance

Installation Guidelines .........................................................................................3-1

Installing Shelves in the Cabinet ..........................................................................3-2

Installing Shelf Supports ...............................................................................3-7

Installing UPS Brackets ..............................................................................3-10

Power and SCSI Cable Connection Procedures...................................................3-14

SCSI Bus Target Addresses and Termination...............................................3-15

Cabling a Single Device Expansion Shelf Subsystem...................................3-16

Cabling a Two Device Expansion Shelf Subsystem .....................................3-19

Cabling a Three Device Expansion Shelf Subsystem....................................3-21

Cabling a Four Device Expansion Shelf Subsystem..................................... 3-23

Controller Shelf Status LED’s............................................................................3-27

Controller Status LEDs......................................................................................3-28

Replacing Field Replaceable Units (FRUs).........................................................3-28

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

Replacing a Power Supply SBB ..................................................................3-31

Replacing the RAID Controller ...................................................................3-32

Replacing the UPS......................................................................................3-33

Replacing a Blower.....................................................................................3-33

Replacing the Controller Memory Cache Modules.......................................3-35

Contents v

Chapter 4

Second Controller Option

Installing the Upgrade..........................................................................................4-2

Saving the Existing Configuration.................................................................4-3

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

Shutting down the RA3000 ...........................................................................4-7

Installing Two SIMMs into Second Controller...............................................4-8

Replace Existing Controller...........................................................................4-9

Restoring the Configuration ........................................................................4-10

Updating the Firmware on a Second Controller............................................4-11

Installing theOriginal Controller..................................................................4-11

Configuring a Dual-Controller Installation for a Single Serial Port......................4-12

Configuring the RA3000 for the Active Mode of Operation .........................4-12

Configuring the Dual Controllers.................................................................4-13

Connecting to Your Dual-Controller Storage System...................................4-15

Verifying the Controller Operating Parameters ............................................4-15

List of Figures

Figure 1-1. RAID Array 3000 Controller Shelf....................................................1-2

Figure 1-2. RAID Array 3000 6-slot Device Expansion Shelf (optional) ..............1-3

Figure 1-3. Controller shelf major components....................................................1-7

Figure 1-4. RAID Array 3000 controller..............................................................1-8

Figure 1-5. Device I/O module..........................................................................1-10

Figure 1-6. Device I/O module blower-status LEDs...........................................1-11

Figure 1-7. Host I/O module .............................................................................1-12

Figure 1-8. Power supply..................................................................................1-14

Figure 1-9. Single host, single adapter, with one active controller ......................1-17

Figure 1-10. Single host, single adapter, with two active controllers...................1-18

Figure 1-11. Single host, dual adapter, two ports with two active controllers......1-19

Figure 1-12. Dual host, single adapter, with one active controller per host..........1-20

Figure 2-1. RAID Array 3000 single controller block diagram.............................2-2

Figure 2-2. Bridging the gap between the host and device expansion shelf...........2-3

Figure 2-3. Storagesets, partitions, and disk drives...............................................2-4

Figure 2-4. Controller front panel........................................................................2-6

Figure 2-5. RAID 0 write..................................................................................2-10

Figure 2-6. Diagram of a RAID 1 write .............................................................2-11

Figure 2-7. Diagram of RAID 0+1 write............................................................2-12

Figure 2-8. Diagram of a RAID 4 write .............................................................2-14

Figure 2-9. Diagram of a RAID 5 write .............................................................2-16

Figure 3-1. Recommended single expansion shelf installation..............................3-3

Figure 3-2. Recommended controller shelf installation (two expansion

shelves)...........................................................................................3-4

Figure 3-3. Recommended controller shelf installation (three expansion

shelves)...........................................................................................3-5

vi RAID Array 3000 Controller Shelf Hardware User's Guide

Figure 3-4. Recommended controller shelf installation (four expansion

shelves)...........................................................................................3-6

Figure 3-5. RETMA cabinet shelf supports........................................................3-10

Figure 3-6. UPS rack-mount bracket assemblies................................................ 3-12

Figure 3-7. UPS bracket RETMA and metric hole locations (front)....................3-12

Figure 3-8. UPS bracket RETMA and metric hole locations (rear).....................3-13

Figure 3-9. Controller/ single device expansion shelf cabling diagram ...............3-17

Figure 3-10. AC power wiring diagram .............................................................3-18

Figure 3-11. Controller/ two device expansion shelf cabling diagram.................3-20

Figure 3-12. Controller/ three device expansion shelf cabling diagram ...............3-22

Figure 3-13. Controller/ four device expansion shelf cabling diagram................ 3-25

Figure 3-14. Shelf status LEDs..........................................................................3-27

Figure 3-15. Controller shelf FRUs ...................................................................3-29

Figure 3-16. Replacing the host I/O SBB...........................................................3-30

Figure 3-17. Removing the controller from the shelf.......................................... 3-32

Figure 3-18. Replacing a blower assembly ........................................................3-34

Figure 3-19. Controller cache modules.............................................................. 3-36

Figure 3-20. Release locking clips.....................................................................3-36

Figure 3-21. Remove installed SIMM modules..................................................3-37

Figure 3-22. Install replacement SIMM.............................................................3-38

Figure 3-23. Pivot SIMM down to secure .......................................................... 3-38

Figure 4-1. Saving the existing configuration ......................................................4-3

Figure 4-2. Save Configuration dialog box..........................................................4-4

Figure 4-3. Update firmware command ...............................................................4-5

Figure 4-4. Firmware Update dialog box .............................................................4-6

Figure 4-5. Insert SIMM into connector ..............................................................4-8

Figure 4-6. Pivot SIMM down to seat..................................................................4-8

Figure 4-7. Remove controller from top slot ........................................................4-9

Figure 4-8. Restoring configuration to new controller........................................4-10

Figure 4-9. Restore Configuration dialog box....................................................4-11

Contents vii

List of Tables

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

Table 1-1 Controller Shelf Part Numbers and Model Descriptions ........................1-4

Table 1-2 Single Host, Single Adapter, with One Active Controller ....................1-17

Table 1-3 Single Host, Single Adapter, with Two Active Controllers ..................1-18

Table 1-4 Single Host, Dual Adapter, Two Port with Two Active

Controllers..........................................................................................1-19

Table 1-5 Dual Host, Single Adapter, with One Active Controller per Host.........1-20

Table 1-6 Controller Shelf Technical Specifications ...........................................1-21

Table 1-7 Controller Shelf Power and Physical Specifications ............................1-24

Table 2-1 LED/Reset Switch Interface .................................................................2-5

Table 2-2 Raid Levels Supported .........................................................................2-9

Table 2-3 Shelf RAID Set Restrictions.................................................................2-9

Table 2-4 RAID 0+1 Example............................................................................2-13

Table 2-5 Response to Various AC Power Conditions ........................................2-19

Table 3-1 Shelf Support Mounting Kits and Installation Guides............................3-7

Table 3-2 RETMA Cabinet Shelf Support Parts List .............................................3-8

Table 3-3 UPS Rack-mount Bracket Mounting Hardware List ............................3-11

Table 3-4 Controller Shelf Field Replaceable Units ............................................3-29

About This Guide

Purpose and Scope

This guide is designed to provide an overview for installers and operators of the Compaq StorageWorks

RAID Array 3000 Controller Shelf User’s Guide.

Intended Audience

This document is written for installers and operators.

Document Structure

This guide contains the following information:

Chapter 1: Product Overview

■

Product description

■

Controller Shelf Features

■

Controller Shelf Enclosure

■

Shelf Cabinet

■

6-Slot Device Expansion Shelf (Optional)

■

Connecting the Controller Shelf to a Host System

■

Specifications

x RAID Array 3000 Controller Shelf Hardware User's Guide

Chapter 2: RAID Array 3000 Controller

■

Controller Overview

■

Controller Features

■

Controller Reset and LED Indicators

■

Flexible Raid Set Configuration

■

RAID Levels Supported

■

Redundant Operation

■

Environmental

Chapter 3: Installation and Maintenance

■

Installation Guidelines

■

Installing Shelves in the Cabinet

■

Power and SCSI Cable Connection Procedures

■

Controller Shelf Status LEDs

■

Controller Status LEDs

■

Replacing Field Replaceable Units (FRUs)

Chapter 4: Second Controller Option

■

Installing the Upgrade

■

Configuring a Dual-Controller Installation for a Single Serial Port

About This Guide xi

Related Documents

Document Title Part Number

RAID Array 3000 Subsystem Second Controller Option Installation Guide

EK-SM3KC-IG.E01

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

AA-RBF2C-TE

RAID Array 3000 Pedestal Storage Subsystem Hardware User’s Guide

EK-SMCPO-UG.C01

xii RAID Array 3000 Controller Shelf Hardware User's Guide

Text Conventions

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

Keys

Keys appear in boldface. A plus sign (+) between two keys indicates that they should be pressed simultaneously.

USER INPUT User input appears in a different typeface and in

uppercase.

FILENAMES File names appear in uppercase italics.

Menu Options, Command Names, Dialog Box Names

These elements appear in initial capital letters.

COMMANDS, DIRECTORY NAMES, and DRIVE NAMES

These elements appear in uppercase unless case sensitive.

Type

When you are instructed to type information, type the information without pressing the Enter key.

Enter When you are instructed to enter information, type

the information and then press the Enter key.

Symbols in Text

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

WARNING:

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

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

CAUTION: Text set off in this manner indicates that failure to follow directions could result in damage to equipment or loss of information.

IMPORTANT: Text set off in this manner presents clarifying information or specific instructions.

About This Guide xiii

NOTE: Text set off in this manner presents commentary, sidelights, or interesting points of information.

Symbols on Equipment

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

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

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

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

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

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

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

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

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

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

xiv RAID Array 3000 Controller Shelf Hardware User's Guide

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

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

Weight in kg

Weight in lb

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

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

Rack Stability

WARNING:

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

be sure that:

■

The leveling jacks are extended to the floor.

■

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

■

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

■

The racks are coupled together in multiple rack installations.

■

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

Getting Help

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

Compaq Technical Support

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

About This Guide xv

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

http://www.compaq.com

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

■

Technical support registration number (if applicable)

■

Product serial number

■

Product model name and number

■

Applicable error messages

■

Add-on boards or hardware

■

Third-party hardware or software

■

Operating system type and revision level

Compaq Website

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

http://www.compaq.com/storage

Compaq Authorized Reseller

For the name of your nearest Compaq authorized reseller:

■

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

■

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

■

Elsewhere, see the Compaq website for locations and telephone numbers

Chapter 1

Product Overview

This chapter provides an overall description of the Compaq StorageWorks

RAID Array 3000 Controller Shelf (controller shelf) and its components. A series of cabling diagrams showing how to connect the controller shelf to a host system and a list of technical and environmental specifications is also included at the end of the chapter.

NOTE: This guide is the Hardware User’s Guide. For configuration information, refer to the Getting Started RAID Array 3000 Installation Guide and the Command Console V2.2 for

the RAID Array 3000 (Pedestal and Rack Mount Models) User’s Guide.

Product Description

The 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 (SBBs), are disk drives from the StorageWorks family of storage devices. The release notes that accompanies the storage system lists the software solutions and disk drives that are supported.

1-2 RAID Array 3000 Controller Shelf Hardware User’s Guide

The controller shelf can be connected to one or up to four 6-slot device expansion shelves to form the complete RAID Array 3000 storage system (see Figure 1– 2). The Compaq StorageWorks BA356 Series Device Expansion Shelf (device 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 (P/N EK–BA356–UG ) which must be used in conjunction with this document too properly install and configure your storage system.

NOTE: The device expansion shelf (DS-SWXRA-GN) must have a revision level of B01 (or higher) to operate with the controller shelf. Also, the Personality I/O module supplied with the shelf (P/N. 70-33067-02) must have a minimum revision level 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.

HR-1

034

Figure 1-1. RAID Array 3000 Controller Shelf

Product Overview 1-3

Figure 1-2 shows the RAID Array 3000 6-slot Device Expansion Shelf (optional).

HR-1

Figure 1-2. RAID Array 3000 6-slot Device Expansion Shelf (optional)

A battery-backup subsystem is included with the controller shelf in the form of a rackmount Uninterruptable Power Supply (UPS). In case of a power failure, the UPS provides temporary power to the storage system while it flushes its cache contents to disks. The UPS is normally installed in the lowest available slot in the cabinet.

CAUTION: The UPS is sized to perform this function for the controller and device expansion shelves only. No other electrical devices should be plugged into the UPS.

As an option, a second RAID controller module can be added for redundancy. The second controller operates in conjunction with the installed controller to protect data in case of a malfunction in the primary unit. The optional controller is installed directly below the primary controller in the center of the shelf (see Figure 1-3).

The controller shelf and its associated options are listed in Table 1– 1.

1-4 RAID Array 3000 Controller Shelf Hardware User’s Guide

Table 1-1

Controller Shelf Part Numbers and Model Descriptions

COMPAQ 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,

differential, ultra wide, host I/O modules One dual-channel, wide, single-ended device I/O

module One 1000 watt UPS with rackmount bracket One five meter host SCSI cable Two 9-pin serial controller cables Two Trilink SCSI cable adapters One gray C13-to-125 V power cord One black C13-to-125 V power cord One controller shelf rackmount kit User documentation. Requires: Solutions Software kit for platform, host

adapter, and disks. Options: second HSZ22-AA controller and cache

memory upgrade.

DS-SWXRA-GK

RA3000 UltraSCSI rackmount controller shelf with one controller, 230 V, which includes:

Except for power cord (DS-SWXRA-GK includes one black and one gray C13-to-230 V), same as DS-SWXRA-GH above.

continued

Product Overview 1-5

Table 1-1 Controller Shelf Part Numbers and Model Descriptions

continued

COMPAQ Part No. Item Description

DS-SWXRA-GN

RA3000 UltraSCSI rackmount 6-Slot storage expansion shelf which includes:

16-bit shelf assembly, two 180 watt power supply SBBs, 16-bit personality I/O assembly, shelf rack mounting kit, power cords, user documentation.

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

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

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

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

1-6 RAID Array 3000 Controller Shelf Hardware User’s Guide

Controller Shelf Features

The 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 VAC)

■ Dual two-speed blowers for shelf cooling

■ Cache backup provided by an external 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

Controller Shelf Enclosure

The controller shelf is housed in a 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 that 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.

Product Overview 1-7

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

■ An easily removable, two channels, resident RAID array controller and

an adjacent empty slot for a second (redundant) controller (optional)

■ 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 AC 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 contains a 9-pin serial port connector (for

controller configuration) and a 9-pin UPS monitor connector

■ Two AC power supplies (one redundant) that power the shelf

components

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

SHR-10 51b

AC Power

Supplies

B low er s

RAID

Contr ol ler

Host 0

I/O M od ule

Host 1

I/ O Modu le

Blank Panel

Device I/O

Module

Figure 1-3. Controller shelf major components

1-8 RAID Array 3000 Controller Shelf Hardware User’s Guide

Shelf Cabinet

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 custom set of mounting brackets 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.

RAID Array 3000 Controller

The controller shelf (Figure 1– 4) contains Wide-Ultra SCSI/differential host channels and Wide-Ultra SCSI/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.

HR-104

ache Memor

Modules

Figure 1-4. RAID Array 3000 controller

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

Product Overview 1-9

The controller shelf contains the following features:

■ Single PCB form factor for inclusion in the shelf

■ Support for dual hot-swap controller operation

■ Dual differential Ultra-Wide SCSI host channels

■ Dual single-ended Ultra-Wide SCSI disk channels

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

■ Voltage/temperature monitoring and support

■ Cluster support for specific operating systems

■ 32 logical unit numbers (LUNs) per host channel (Windows is limited to

eight per host channel)

■ Support for spare disks

■ UPS-backed write caching

■ Per LUN write cache/write back selection

■ Configuration/maintenance via serial or host SCSI channel using

StorageWorks Command Console (SWCC) (see the operating system platform kit for details).

■ Update of firmware via host channel

Device I/O Module

The device I/O module provides the electrical interface between the controller shelf and the device buses (Figure 1– 5). 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, and 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

■ Two-speed blower operation

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

automatic corrective action

1-10 RAID Array 3000 Controller Shelf Hardware User’s Guide

Figure 1-5 shows the Device I/O module.

HR-104

Upper

Mounting

Tab

Lower

Mounting

Tab

Device Port 0

Connector

Device Port 1

Connector

Figure 1-5. Device I/O module

The dual-channel device I/O module has two 68-pin VHDCI female connectors 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 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 Flash. The upper LED displays the 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. Refer to the StorageWorks SBB Shelf I/O Module User’s Guide supplied with the device expansion shelf for a description of the blower status LEDs when troubleshooting a shelf-cooling problem.

Product Overview 1-11

Figure 1-6 shows the Device I/O module blower-status LEDs.

HR-104

Left

Blower

LED

SCSI Bus

Address Switch S3

(Not Used)

SCSI Bus

Te r mi n at io n

Switch S4

Right

Blower

LED

Figure 1-6. Device I/O module blower-status LEDs

NOTE: The SCSI bus address switch on the controller shelf device I/O module does not control the target addresses of the SBB slots in the device expansion shelves. This switch has been electrically disabled by design. Refer to the StorageWorks SBB Shelf I/O Module User’s Guide supplied with the device expansion shelf for a description of how to set the 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 Chapter 3, “Installation and Maintenance.”

1-12 RAID Array 3000 Controller Shelf Hardware User’s Guide

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 in the shelf.

HR-1

036

Host Out

Host In

CTR

UPS

Figure 1-7. Host I/O module

The front panel of the host I/O module contains two 68-pin VHDCI SCSI connectors and two 9-pin D connectors. The SCSI connectors provide the SCSI bus connections between the adapter in the host system and the controllers 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 Host Out (top connector). Host In provides the SCSI connection for a one-to-four expansion shelf cabinet installation. Cable connections to multiple storage shelves are made through Trilink adapters.

Product Overview 1-13

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 connector. The UPS serial connector on the host I/O module (designated CTR 0 and CTR 1) provides shelf status information to the UPS.

NOTE: If you have only one SCSI cable connection to the host I/O module, you must connect the cable to the Host In connector. Do not use any external bus termination. The Host Out connector on the module is used for mid-bus connections in a multiple-host system configuration.

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 exhausting it out the rear of the 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 90ºF + 36ºF (32ºC + 2ºC), the circuitry:

■ Turns on LED for both blowers.

■ Causes both blowers to switch to the high-speed mode to increase

airflow 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 an 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 airflow 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.

1-14 RAID Array 3000 Controller Shelf Hardware User’s Guide

Controller Shelf Power Supplies

The controller shelf has two interchangeable, air-cooled, 180 watt AC power supply SBBs (see Figure 1– 8) located in 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 controllers, 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.

SHR-103

Figure 1-8. Power supply

UPS

The primary function of the UPS is to keep the entire storage system powered up to enable the controllers 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 is normally mounted in a lower shelf slot in the cabinet using a custom set of mounting brackets.

Product Overview 1-15

The major features of the UPS include Battery Management Technology (doubles battery life and speeds recharge time), hot-plug batteries to simplify service, voltage regulation, power control which enables scheduled shutdowns and maximized run time, and network surge protection.

The front panel display has user controls (LEDs and control buttons) and the rear 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 servicing. 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 manual describes the UPS in detail and is part of the documentation set enclosed with your storage system.

6-Slot Device Expansion Shelf (Optional)

NOTE: The device expansion shelf must have a revision level of B01 (or higher) to operate

with the controller shelf. Also, the personality I/O module supplied with the shelf (P/N 70-33067-02) must have a minimum revision level of H01 or higher.

The controller shelf is designed to operate with the device expansion shelf (see 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 AC power supplies, a personality I/O module that provides the UltraSCSI bus interface, and six empty slots for storage device SBBs. The user guide for the device expansion shelf is packaged with the unit and must be used with this document to properly install and configure the controller shelf.

1-16 RAID Array 3000 Controller Shelf Hardware User’s Guide

Connecting the Controller Shelf to a Host System

This section shows 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 ports with two active controllers

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

Product Overview 1-17

Figure 1-9 shows a diagram of a Single Host, Single Adapter, with one Active Controller.

Host

System

Host

Adapter

shr-1316b

Figure 1-9. Single host, single adapter, with one active controller

Table 1-2

Single Host, Single Adapter, with One Active Controller

Item # Description

Device expansion shelves



Controller shelf

SCSI cable BN37A-05 (host adapter connection made using technology adapter cable BN38E-OB, not shown)



Host-In connector on H0 I/O module



Host-In connector to H1 I/O module (not used in this configuration)

SCSI cables BN37A-OE (2) for device I/O module 0

SCSI cables BN37A-OE (2) for device I/O module 1

1-18 RAID Array 3000 Controller Shelf Hardware User’s Guide

Figure 1-10 shows a diagram of a Single Host, Single Adapter, with two Active Controllers.

Host

System

Host

Adapter

shr-1317b

Figure 1-10. Single host, single adapter, with two active controllers

Table 1-3

Single Host, Single Adapter, with Two Active Controllers

Item # Description

Device expansion shelves



Host-In connector on H0 I/O module

Controller shelf



SCSI cable BN37A-05 (host adapter connection made using technology adapter cable BN38E-OB, not shown)



SCSI cable BN37A-OE combining host modules H0 and H1

Host-In connector on H0 I/O module

Host-In connector on H1 I/O module

H1 host I/O module Host-Out connector (not used in this configuration)

SCSI cables BN37A-OE (2) for device I/O module 0

SCSI cables BN37A-OE (2) for device I/O module 1

Product Overview 1-19

Figure 1-11 shows a diagram of a Single Host, Dual Adapter, Two Ports with two Active Controllers.

Host

System

Host

Adapter

Host

Adapter

shr-1318b

Figure 1-11. Single host, dual adapter, two ports with two active controllers

Table 1-4

Single Host, Dual Adapter, Two Port with Two Active Controllers

Item # Description

Device expansion shelves



Controller shelf

SCSI cable BN37A-05 (host adapter connection made using technology adapter cable BN38E-OB, not shown)



SCSI cable BN37A-05 (host adapter connection made using technology adapter cable BN38E-OB, not shown)



Host In connector on H0 I/O module

Host In connector on H1 I/O module

SCSI cables BN37A-OE (2) for device I/O module 0

SCSI cables BN37A-OE (2) for device I/O module 1

1-20 RAID Array 3000 Controller Shelf Hardware User’s Guide

Figure 1-12 shows a diagram of a Dual Host, Single Adapter, with one Active Controller per Host.

Host

System

Host

Adapter

Host

System

Host

Adapter

shr-1319b

Figure 1-12. Dual host, single adapter, with one active controller per host

Table 1-5

Dual Host, Single Adapter, with One Active Controller per Host

Item # Description

Device expansion shelves



Controller shelf

SCSI cable BN37A-05 (host adapter connection made using technology adapter cable BN38E-OB, not shown)



SCSI cable BN37A-05 (host adapter connection made using technology adapter cable BN38E-OB, not shown)



Host-In connector on H0 I/O module

Host-In connector on H1 I/O module

BN37A-OE (2) for device I/O module 0

SCSI cables BN37A-OE (2) for device I/O module 1

Product Overview 1-21

Specifications

Table 1-6

Controller Shelf Technical Specifications

Feature Description

Model

RA3000 rack mount controller shelf (DS-SWXRA-GH, -GK) RA3000 rack mount disk shelf (DS-SWXRA-GN)

Controller shelf description

BA356 style shelf with one HSZ22 controller, two 180 watt power supplies, two host I/O modules, one-dual channel Wide-Ultra, single-ended personality module, blue

Disk controller shelf

BA356 disk SBB shelf with two 180 watt power supplies, one single channel Wide-Ultra, single ended personality module, blue

Controller model One HSZ22 standard

Dual active controllers With DS-HSZ22 second controller upgrade

Controller cache 16 MB standard

64 MB standard with two controllers

Backup for cache 1000 VA UPS, standard with controller shelf

Controller operation (with 2 controllers)

Active-Active (recommended) Active-Passive (spare)

Controller failover Yes, automatic

Mirrored write-back cache Yes

Write through cache Yes

Command Queuing Yes, 64 commands

Write gathering Yes

Host channels Two Wide-Ultra SCSI differential

Drive channels Two Wide-Ultra SCSI single ended

Maximum transfer rate 44.7 MB per second per controller pair

RAID 5 sustained transfer rate Read – 32.6 MB per second per controller pair

Write – 30.6 MB per second per controller pair

Maximum I/O per second 4,400 I/O per second

continued

1-22 RAID Array 3000 Controller Shelf Hardware User’s Guide

Table 1-6 Controller Shelf Technical Specifications

continued

Feature Description

Sustained RAID 5 I/O rate— 2 KB block transfers

Read - 1,375 I/O per second per controller pair Write – 392 I/O per second per controller pair

RAID levels supported 0, 1, 0+1, 4, 5

Non-RAID disk support (JBOD) Yes

Reconstruct time Configurable with SWCC

Stripe size/chunk size Variable

Maximum logical drives (LUNs) Up to 30 RAID sets

Up to 16 redundancy groups (LUNs) per RAID set

Maximum disk/ RAID sets Two, 32 blocks, theoretical 2.2 petabytes; restricted by drive

capacity

Boot from RAID set Yes, operating systems dependent

Passthrough to tape, CD Not supported

Maximum number of disks 24 in four disk shelves

Maximum disks per device port

Global spare Yes

Drive support 2, 4, 9, 18, 36 GB wide UltraSCSI drives in SBB

Redundant fans Yes

Drive reconstruct Automatic with spare

Disk hot plug Yes

Redundant power supplies

Yes

Environmental monitoring Yes, monitors power and temperature

Setup/control lines 1 serial per controller

Serviceability Hot-plug components

continued

Product Overview 1-23

Table 1-6 Controller Shelf Technical Specifications

continued

Feature Description

RAID manger GUI support

StorageWorks Command Console V2.2 (SWCC) available for all platforms.

Regulatory approvals EMI/R I— FCC Class A, CSA 108.8 Class A, VCCI level 1, BICQ

Class A, CISPR-22 Class 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, GS Mark, CE mark

1-24 RAID Array 3000 Controller Shelf Hardware User’s Guide

Table 1-7

Controller Shelf Power and Physical Specifications

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— optimal, Temperature— minimum required

65° F to 75° F (18°C to 24° C) 50° F to 104° F) (10°C to 40°C)

Relative humidity – optimal Relative humidity – minimum required

40% to 60% non condensing 10% to 90% non condensing

Maximum wet bulb temperature 82

F (28oC)

Minimum dew point: 36

F (2oC)

Altitude Up to 8,000 ft (2,400 m)

Inlet air volume 0.026 cubic meter per second

(50 cubic feet per minute)

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

at a size of 0.5 micron or larger

Temperature -40°F to 151° F (-40°C to +66°C)

Relative humidity 8% to 95% non condensing in original shipping

container

Altitude From – 300 m to 3,600 m (-1,000 ft. to 12,000 ft )

Physical characteristics* Installed dimensions

Controller and disk shelves

UPS

*Disk SBBs are not included.

continued

Product Overview 1-25

Table 1-7 Controller Shelf Power and Physical Specifications

continued

Operating Environment Specification

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

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

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

Weight Controller shelf 9.5kg

(21 lb.) Disk shelf 7.3 kg (16 lb.)

UPS 27kg (59.5 lb.)

Chapter 2

RAID Array 3000 Controller

This chapter describes the major features and characteristics of the Compaq StorageWorks RAID Array 3000 Controller (Controller) in the controller shelf.

Controller Overview

The controller provides high performance, high-availability access to SCSI disk array subsystems along a Wide-Ultra SCSI 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 5.5 in (14.0 cm) x 8 in (20.3 cm). 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 components in the RAID Array 3000. The unit is configured with two Wide-Ultra, 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 Wide-Ultra, single-ended, SCSI disk channels capable of transferring data to and from the disk drives at rates up to 40 Mb/s. Each channel can support up to 12 drives.

2-2 RAID Array 3000 Controller Shelf Hardware User’s Guide

The controller has two Single Inline Memory Module (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 64 MB while a redundant setup has a maximum usable cache of 32 MB per controller.

RAID Array 3000 Controller Shelf

Port 0

Port 1

Write-Back

Cache

Module

2 Device Ports

Device I/O

Assy

Host I/O

Assy

Host

System 0

Host

System 1

Cache

Interface

Control ler / Bus

Modules

RAID Controller

Ultra SCSI Wide

Single-Ended

Interface

To U PS

CTR Serial

Interface

UPS Control

Interface

Device

Storage

Shelves

Maintenance P

HR-1

050

Ultra

SCS

Differential, Wide

Interface

Figure 2-1. RAID Array 3000 single controller block diagram

RAID Array 3000 Controller 2-3

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. Redundancy groups (virtual LUNS) can be mapped to only one active host port and are not accessible from the passive port or the other controller (that is, 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 LUNs) can be mapped to 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.

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.

HR-1042

Storage

Shelf

Controller

Host

Figure 2-2. Bridging the gap between the host and device expansion shelf

2-4 RAID Array 3000 Controller Shelf Hardware User’s Guide

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, highperformance storage unit called a storageset. Storagesets are implementations of RAID technology, also known as a Redundant Array of Independent Disks. Every storageset shares one important feature: whether it uses two disk drives or 12, each storageset looks like a single storage unit to the host.

You create storage units by combining disk drives into storagesets such as stripesets, RAIDsets, and mirrorsets, or by presenting them to the host as single-disk units (see Figure 2– 3).

Mirrorset

Partitioned Storageset

Stripeset

Partitioned Disk Drive

Striped Mirrorset

Raidset

Disk Drives

3000-24

Figure 2-3. Storagesets, partitions, and disk drives

RAID Array 3000 Controller 2-5

■

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

requests rates.

■ Mirrorsets (RAID 1) combine disk drives in parallel to provide a highly

reliable storage unit.

■ RAID 4 provides striping with a fixed parity drive.

■ 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.

Controller Reset and LED Indicators

Figure 2– 4 shows the front panel of the controller. All LEDs are numbered from left to right. The reset button (LED 0) flashes green about once every second (heartbeat) to indicate that the controller is operating normally. LEDs 1 through 4 display host and disk channel activity (amber). LED 5 (normally Off) turns On red during a controller failure. The LED/Reset switch interface is listed in Table 2– 1.

Table 2-1

LED/Reset Switch Interface

LED # Name

0 Heartbeat/LED controller reset switch (green)

1 Host channel 0 activity 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)

2-6 RAID Array 3000 Controller Shelf Hardware User’s Guide

Figure 2– 4 shows the Front Panel of the controller.

HR-104

Reset H0 H1 D1 FaultD0

Reset H0 D0H1 D1 Fault

Figure 2-4. Controller front panel

Flexible RAID Set Configuration

In addition to its flexible hardware design, the controller’s firmware offers the user the flexibility to configure RAID sets in several different ways:

■ RAID sets can comprise drives from any drive channel and SCSI ID.

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

single drive, or any number of drives in between.

■ The controller supports RAID Levels 0, 1, 0+1, 4, and 5. It also supports

Just a Bunch of Drives (JBOD), 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.

RAID Array 3000 Controller 2-7

■

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 RAID sets are accomplished via

SWCC with software platform kit.

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

Custom Components

To increase performance and reliability, the controller’s core functions have been encapsulated in four custom Application Specific Integrated Circuits (ASIC) 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 Interface 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/s and a maximum sustainable rate of 60 Mb/s.

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 onboard cache 60 ns SIMMs.

2-8 RAID Array 3000 Controller Shelf Hardware User’s Guide

NOTE: The controller will not operate without at least one 16 MB SIMM installed in its cache. Nor will it operate without a UPS power supply connected to the controller. Without a UPS, data stored in the cache, but not yet written to the disk drives, would be lost in the event of a power interruption.

Write-Back Caching

When the host sends data to be written to a LUN, the controller stores the data in its cache and immediately reports to the host that 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.

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.

Write On 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.

RAID Array 3000 Controller 2-9

RAID Levels Supported

The controller supports the following RAID levels:

Table 2-2

Raid Levels Supported

RAID Level Description

0 Striping without parity

1 Mirroring

0+1 Striping and mirroring

4 Striping with fixed parity drive

5 Striping with floating parity drive

JBOD just a bunch of drives

There are some restrictions you must adhere to when creating a RAID set using the RAID 3000 shelf. The minimum and maximum number of drives required to support each RAID level is listed in Table 2– 3.

Table 2-3

Shelf RAID Set Restrictions

RAID Level Min. No. of Drives Max. No. of Drives

JBOD 1 1

0224

1224

0+1

416

4324

5324

Must be an even number.

2-10 RAID Array 3000 Controller Shelf Hardware User’s Guide

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 bandwidth. By breaking up a large block 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 that a RAID 0-disk array offers no redundancy and thus cannot recover from a drive failure.

1011 0110 1010 0101 0000

0001 1100

1111 0 111 1010

Host Data Controller divides the

data into chunksized units

There is still data left

so the Controller

repeats the process

1011

0001

0110

1100

1010

1111

0101

0111

0000

1010

Striped data written to the array

SHR-1054

Figure 2-5. RAID 0 write

RAID Array 3000 Controller 2-11

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 shows a RAID 1 write.

0010 1011 0110

Host Data

Controller writes data from cache

to all drives in

the array

HR-1

055

Figure 2-6. Diagram of a RAID 1 write

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.

2-12 RAID Array 3000 Controller Shelf Hardware User’s Guide

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.

1110 11 01 1011

Host Data

Controller divides

the data into

chunksized units

1110 1101 1011

Striped data written to half the drives

Striped data mirrored to the remaining drives

HR-1

056

Figure 2-7. Diagram of RAID 0+1 write

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.

RAID Array 3000 Controller 2-13

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 first two drives, another mirrored pair with the second two drives, and so on. Table 2– 4 lists how the controller uses the drives in a RAID 0+1 set.

Table 2-4

RAID 0+1 Example

Drives Selected 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 stripe set

Channel 2, ID 2 Mirror of channel 2, ID 1

2-14 RAID Array 3000 Controller Shelf Hardware User’s Guide

RAID 4

RAID 4 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 (Figure 2– 8). 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.

0011 1011 0110 111 0

0110 0000 1111 111 0

Host Data

Controller divides the

data into chunksized units

and calculates parity

There is still data left

so the Controller

repeats the Process

0011

0110

1011

0000

0110

1111

111 0

Striped data and parity written to the array

HR-1

0000

0111

XOr

Parity =

Figure 2-8. Diagram of a RAID 4 write

RAID Array 3000 Controller 2-15

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 single failure and handle I/O activity without interruption in degraded mode until the failed drive is rebuilt. If a second drive fails while the RAID set is in degraded mode, the entire RAID set will fail.

2-16 RAID Array 3000 Controller Shelf Hardware User’s Guide

RAID 5

RAID 5 addresses the bottleneck issue for barrages of widely scattered, small I/O operations (Figure 2– 9). 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.

1101 0110 1011 0010

0111 1110 0001 0110

Host Data

Controller divides the

data into chunksized units

and calculates parity

There is still data left

so the Controller

repeats the Process

110 1

1011

0111

0110

1110

1011

0001

0010

0110

Striped data and parity written to the array

Striped data written to the array

HR-1

058

0010

1110

XOr

Parity =

and parity

Figure 2-9. Diagram of a RAID 5 write

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.

RAID Array 3000 Controller 2-17

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 single failure and handle I/O activity without interruption in degraded mode until the failed drive is rebuilt. If a second drive fails while the RAID set is in degraded mode, the entire RAID set will fail.

JBOD

JBOD makes it possible to connect 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.

The system parameters allow you to customize certain aspects of the controller via the SWCC Graphical User Interface (GUI).

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.

■ 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 (that is, active/active or active/passive).

2-18 RAID Array 3000 Controller Shelf Hardware User’s Guide

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.

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.

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 Busy status. The delay is to prevent host operating systems from seeing too many errors and fencing off the controller.

RAID Array 3000 Controller 2-19

Environmental

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

Backup Power Management

The controller must be connected to the 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, the controller AC power is supplied from a line source through both power cords to both power supplies. Conditions of poor or no power cause the following UPS responses:

Table 2-5

Response to Various AC Power Conditions

Condition Response

Low line voltage

UPS compensation circuit automatically increases output voltage, without placing load on the UPS battery.

No line voltage (AC loss)

UPS switches to the battery, which supplies power to the controller maintaining full functionality.

UPS signals controller of impending power down. Caching is disabled but the controller continues to service host requests and begins to flush cache to disk.

UPS low-battery warning

UPS signals controller of impending power down. Subsystem discontinues host services. Cache flush is completed.

UPS power down

UPS shuts itself off, preventing complete battery discharge. All data has been written to disk.

Chapter 3

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 Uninterruptable Power Supply (UPS), Device expansion shelves and host system. The maintenance section describes how to interpret the status of the LEDs on the front panel of the controller shelf. The chapter also describes how to replace a Field Replaceable Unit (FRU).

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 and target ID addresses, and making the power and SCSI cable connections between the rackmount components. The cabling 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 prevent the possible loss of data, always shut down your subsystem from the StorageWorks Command Console (SWCC). Do not turn off system power before Shutdown is issued. When Shutdown is issued from SWCC, the controller blinks until it has flushed the cache to the disk drive.

3-2 RAID Array 3000 Controller Shelf Hardware User’s Guide

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

bottom-up approach.

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

shelves grouped together to minimize cable length problems.

■ Install the UPS below the shelves and as low as possible in the cabinet

■ Allow approximately two inches (5.08 cm) gap between the bottom of

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

Installing Shelves in the Cabinet

Determining the best location to install the controller and device expansion shelves in the cabinet depends on the number of expansion shelves in your subsystem configuration. The shelves should be grouped as shown in 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 the subsystem shelves directly above. The host system (not shown) can reside between the UPS and the subsystem 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.

NOTE: The distance between shelves should not exceed one 1.5 in. (3.8 cm)

■ Because of power cord lengths, the distance between the last device expansion

shelf at the top of a shelf group and the UPS should not exceed 45 in (114 cm).

Installation and Maintenance 3-3

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 and must be set to 8-13.

HR-1

096

P / S

Device

Expansion

Shelf

Controller

Shelf

UPS

Figure 3-1. Recommended single expansion shelf installation

3-4 RAID Array 3000 Controller Shelf Hardware User’s Guide

Figure 3-2 shows the Recommended Controller Shelf Installation (two expansion shelves).

HR-1

097

P / S

433221100

Figure 3-2. Recommended controller shelf installation (two expansion shelves)

Installation and Maintenance 3-5

Figure 3-3 shows the Recommended Controller Shelf installation (three expansion shelves).

HR-1

098

P / S

Figure 3-3. Recommended controller shelf installation (three expansion shelves)

3-6 RAID Array 3000 Controller Shelf Hardware User’s Guide

Figure 3-4 shows the Recommended Controller Shelf installation (four expansion shelves).

HR-1

099

P / S

Figure 3-4. Recommended controller shelf installation (four expansion shelves)

Installation and Maintenance 3-7

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. The UPS is rack mounted using custom adjustable rail brackets. Table 3–1 lists the shelf support mounting kits and identifies the documents and procedures that contain the instructions needed to install them.

Table 3-1

Shelf Support Mounting Kits and Installation Guides

Cabinet Style

Shelf Support Kit

Part No.

Installation Guide/Part No.

RETMA cabinet installation (round hole).

70-33381-01

See

“ Installing Shelf Supports in a

RETMA Cabinet (Round Hole)

”

RETMA cabinet installation (square hole).

70-33381-01

See

“ Installing Shelf Supports in a

RETMA Cabinet (Square Hole)

”

Metric cabinet Installation

BA35X-RD SW500 and SW800 Cabinet Metric

Shelf Bracket Kit Installation Guide

UPS installation into a RETMA or metric cabinet

74-53154-01/02

(plus hardware)

See

“ Installing UPS Brackets”

3-8 RAID Array 3000 Controller Shelf Hardware User’s Guide

Installing Shelf Supports in a RETMA Cabinet (Round Hole)

Use the following procedure to install the shelf support kit into a RETMA cabinet 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 Support Parts List

Item # Part Number Description Qty.

74-46419-01 Shelf retainer bracket, (0.25 in.) 4



74-46419-02 Shelf retainer bracket, (1.50 in.) 2

74-48220-01 Shelf support – BA350-SA 1



74-48220-02 Shelf support – BA350-SA 1



74-48223-01 Nut plate 2

74-50250-01 Support bracket – BA350-24/U 1

90-00063-37 Screw – 10 x 32 14

90-06565-00 Nut – 10 x 32 2

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.

Installation and Maintenance 3-9

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.

Installing Shelf Supports in a RETMA Cabinet (Square 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 general packaging.

3. Determine the mounting location in your 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 screws.

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

Align the support with the left unit and tighten the screws.

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.

3-10 RAID Array 3000 Controller Shelf Hardware User’s Guide

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 shelf supports

Installing UPS Brackets

The shelf brackets that support and secure the UPS in the cabinet are a custom design. The following procedure describes how to install the rack-mount brackets. It applies to both cabinet designs – RETMA and metric. You will need the following items to properly install the UPS brackets in your style cabinet:

■ 2 UPS rack-mount brackets (74-53154-01 and -02)

■ 1 bag (Table 3-3 lists contents) of mounting hardware (99-06557-05)

■ Phillips-head screwdriver

Installation and Maintenance 3-11

Table 3-3

UPS Rack-mount Bracket Mounting Hardware List

Cabinet Style Hardware Item 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 90-06664-00

Figure 3-6 shows the left and right-hand UPS bracket assemblies. 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).

3-12 RAID Array 3000 Controller Shelf Hardware User’s Guide

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 to cabinet with a cage nut or U-nut.

Figure 3-6. UPS rack-mount bracket assemblies

Figure 3-7. UPS bracket RETMA and metric hole locations (front)

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 Unuts) at the rear of the rail into the corresponding holes in the cabinet (see Figure 3-7). Extend the bracket beyond rail and tighten the hardware to secure the bracket to the cabinet.

5. Install the UPS right-hand bracket on the right side of the cabinet using

the same hole patterns and hardware used in steps 2 and 3.

Installation and Maintenance 3-13

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

7. Carefully lift and insert the UPS onto the brackets and push the unit

back into the cabinet until the mounting holes in each flange align with the corresponding holes in the cabinet.

8. Secure the front panel of the UPS to the cabinet (see Figure 3-8 for

correct holes) using two SST flat-washers and screws.

9. Connect the UPS power cord to the AC power strip.

Figure 3-8. UPS bracket RETMA and metric hole locations (rear)

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 shelves, 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.

3-14 RAID Array 3000 Controller Shelf Hardware User’s Guide

NOTE: All four cabling procedures describe how to connect your subsystem 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 Out connector on the I/O module. This connector is electrically the same as Host In and is used for mid-bus connections in a multiple-host configuration.

SCSI Bus Target Addresses and Termination

NOTE: The SCSI bus address switches on the controller shelf device I/O module has been

disabled. It does affect or control the SCSI bus addresses of the devices in the device expansion shelves. The target addresses of the disk drives are set by address switch S3 on the personality 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 following four cabling procedures.

Installation and Maintenance 3-15

Cabling a Single Device Expansion Shelf Subsystem

1. Ensure the physical installation phase of installing and securing shelf

brackets and shelves (including the UPS) has been accomplished and that the shelves are secured within the shelf bracket the shelf lock provided.

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 Figure 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.

3-16 RAID Array 3000 Controller Shelf Hardware User’s Guide

CAUTION: To prevent possible damage to the equipment, the input voltage level of the UPS must be set to your specific line voltage before proceeding. Refer to the UPS manual and set the input level to your AC power sources.

12. After the UPS has been set to the correct input voltage level, set the UPS

low-battery warning option to five minutes (refer to the UPS manual for instructions).

13. This completes the controller and device expansion shelf cabling

procedure. Dress and tie-wrap related cable groups, and then refer to the

Getting Started RAID Array 3000 Installation Guide and Command Console V2.2 for the RAID Array 3000 (Pedestal and Rack Mount Models) User’s Guide for information describing how to setup and

configure your subsystem.

HR -111 7

DEVICE EXPANSION SHELF # 1

CONTROLLER SHELF

P/SAP/S

P/S

CTR 0

Host 0 I/O

Module

Devi ce

I/O Module

Personality I/O

Module

SCSI Cable

BN37A-0E

Maintenance

To Host System

SCSI Cable

BN37A-05

Serial Control

Cable

(17-04 730-01)

ON OFF

1234567

SCSI Bus Address

Switch (S3)

OFF ON 1 2 3 4

SCSI Bus

Te r m i n a t i o n Switch (S4)

OFF

ON 1 2 3 4

SCSI Bus Termin ation Switch (S4)

Figure 3-9. Controller/ single device expansion shelf cabling diagram

Installation and Maintenance 3-17

Figure 3-10 shows the AC Power wiring diagram.

HR-111

DEVICE EXPANSION SHELF #1

CONTROLLER SHELF

UPS

P/SAP/S

P/S

UPS

Host 0 I/O

Module

Device Expansion

Shelves 2, 3, and 4

Gray Power Cords

Black Power Cords

AC Power

Receptacles

UPS Control

(17-04729-01)

AC Power

Source

Figure 3-10. AC power wiring diagram

NOTE: Dip switch position is down, white and black position is up.

3-18 RAID Array 3000 Controller Shelf Hardware User’s Guide

Cabling a Two Device Expansion Shelf Subsystem

1. Ensure the physical installation phase of installing and securing shelf

brackets and shelves (including the UPS) has been accomplished and that the shelves are secured within the shelf bracket the shelf lock provided.

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 Figure 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.

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 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.

Installation and Maintenance 3-19

12. Install jumper connector 12-49700-01 to the controller shelf UPS

connector on the host 1 I/O module.

HR-111

DEVICE EXPANSION SHELF # 1

DEVICE EXPANSION SHELF # 2

CONTROLLER SHELF

P/S

CTR 0

Host 0 I/O

Module

Device

I/O Module

Personality I/O

Module

Personality I /O

Module

SCSI Cable

BN37A-0E

Maintenance

To Host System

SCSI Cabl e

BN37 A-05

Serial Control

Cable

(17-04730-01)

OFF ON

ON OFF

1234567

SCSI Bus Address

Switch (S3)

1 2 3 4

SCSI Bus Termination Switch (S4)

Figure 3-11. Controller/ two device expansion shelf cabling diagram

13. After the UPS has been set to the correct voltage level, set the UPS low-

battery warning option to five minutes (refer to UPS manual for instructions).

14. This completes the controller and device expansion shelf cabling

procedure. Dress and tie-wrap related cable groups, and then refer to the

Getting Started RAID Array 3000 Installation Guide and Command Console V2.2 for the RAID Array 3000 (Pedestal and Rack Mount Models) User’s Guide for information describing how to setup and

configure your subsystem.

3-20 RAID Array 3000 Controller Shelf Hardware User’s Guide

Cabling a Three Device Expansion Shelf Subsystem

1. Ensure the physical installation phase of installing and securing shelf

brackets and shelves (including the UPS) has been accomplished and that the shelves are secured within the shelf bracket the shelf lock provided.

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 Figure 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.

Installation and Maintenance 3-21

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.

HR-111

DEVICE EXPANSION SHELF # 1

DEVICE EXPANSION SHELF # 2

DEVICE EXPANSION SHELF # 3

CONTROLLER SHELF

P/S

TRI

Link

P/S

CTR 0

Host 0 I/O

Module

Device

I/O Module

Personality I/O

Module

Personality I/O

Module

Personality I/O

Module

Personality I/O

Module

SCSI Cable

BN37A-0E

Maintenance

To Host System

SCSI Cable

BN37A-05

Serial Control

Cable

(17-04730-01)

ON OFF

1234567

SCSI Bus Addre ss

Switch (S3)

1 2 3 4

SCSI Bus Termination Switch (S4)

OFF ON

ON OFF

1234567

SCSI Bus Addre ss

Switch (S3)

1 2 3 4

SCSI Bus Termination Switch (S4)

OFF ON

ON OFF

1234567

SCSI Bus Addre ss

Switch (S3)

1 2 3 4

SCSI Bus Termination Switch (S4)

OFF ON

Figure 3-12. Controller/ three device expansion shelf cabling diagram

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.

15. After the UPS has been set to the correct 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 tie-wrap related cable groups, and then refer to the

Getting Started RAID Array 3000 Installation Guide and Command Console V2.2 for the RAID Array 3000 (Pedestal and Rack Mount Models) User’s Guide for information describing how to setup and

configure your subsystem.

3-22 RAID Array 3000 Controller Shelf Hardware User’s Guide

Cabling a Four Device Expansion Shelf Subsystem

1. Ensure the physical installation phase of installing and securing shelf

brackets and shelves (including the UPS) has been accomplished and that the shelves are secured within the shelf bracket the shelf lock provided.

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 Figure 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.

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 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.

Installation and Maintenance 3-23

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.

HR-112

DEVICE EXPANSION SHELF # 1

DEVICE EXPANSION SHELF # 3

DEVICE EXPANSION SHELF # 2

DEVICE EXPANSION SHELF # 4

CONTROLLER SHELF

P/S

TRI

Link

TRI

Link

P/S

CTR 0

Host 0 I/O

Module

Device

I/O Mod ule

Personality I/O

Module

Personality I/O

Module

Person ality I/O

Module

Person ality I/O

Module

SCSI Cable

BN37A-0E

SCSI Cable

BN37A-0E

Maintenance

To Host System

SCSI Cable

BN37A -05

Serial Control

Cable

(17-04 730-01)

ON OFF

1234567

SCSI Bus Address

Switch (S3)

1 2 3 4

SCSI Bus

Termination

Swit ch (S4)

OFF

ON OFF

1234567

SCSI Bus Address

Switch (S3)

1 2 3 4

SCSI Bus

Termination

Swit ch (S4)

OFF ON

Figure 3-13. Controller/ four device expansion shelf cabling diagram

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.

3-24 RAID Array 3000 Controller Shelf Hardware User’s Guide

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.

17. After the UPS has been set to the correct input voltage level, set the low-

battery warning option to five minutes (refer to UPS manual for instructions).

18. This completes the controller and device expansion shelf cabling

procedure. Dress and tie-wrap related cable groups, and then refer to the

Getting Started RAID Array 3000 Installation Guide and Command Console V2.2 for the RAID Array 3000 (Pedestal and Rack Mount Models) User’s Guide for information describing how to setup and

configure your subsystem.

Controller Shelf Status LED’s

The controller shelf is equipped with two front-panel LEDs that monitor the following error conditions (see Figure 3-14):

■ A shelf blower that is not operating

■ An over-temperature condition

■ A DC power problem

■ External fault conditions

■ Controller faults

When the shelf is operating properly, the green power LED is On and the amber shelf fault LED is Off. If a DC power problem develops, the power LED turns Off indicating a malfunction.

Installation and Maintenance 3-25

The amber shelf status LED is normally off. If an error condition occurs, the LED turns on and an audible alarm sounds notifying the operator that an error condition exists. Once the user has been notified and is aware of an error, the alarm disable toggle switch enables the operator to disable the audible alarm by using the switch.

HR-1

063

Fault LED

(Amber)

DC Power

LED (Green)

Figure 3-14. Shelf status LEDs

Controller Status 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 operating normally. See Figure 2-3, “Storagesets, Partitions and Disk Drives” and Table 2-1, “LED/Reset Switch Interface” for a description of their functions.

3-26 RAID Array 3000 Controller Shelf Hardware User’s Guide

Replacing Field Replaceable Units (FRUs)

This section describes how to replace an FRU in the 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 rack-mount UPS is also field replaceable. Refer to the user’s guide supplied with the unit for the order number and instructions of how to replace it.

Installation and Maintenance 3-27

Figure 3-15 is an exploded view that shows the FRUs in the controller shelf. Table 3-4 lists the units and their corresponding part numbers.

SHR-1052

Figure 3-15. Controller shelf FRUs

Table 3-4

Controller Shelf Field Replaceable Units

Item # Qty. Part Number Description

2 DS-BA35X-HH Power supply, 180 W, 50/60 Hz, +5 V, +12V,



70-33523-01 RAID controller

2 70-33525-01 Host I/O module



1 70-33067-05 Device I/O module



2 70-29761-07 Blower Assembly

Second (redundant) controller is optional

3-28 RAID Array 3000 Controller Shelf Hardware User’s Guide

Replacing a Host or Device I/O SBB

CAUTION: When you remove an SBB, the airflow through the 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 shelf).

5. Observe that the SBB status LEDs are operating.

6. Reconnect the cables and jumper (which were disconnected from the

original module).

SHR-103

Figure 3-16. Replacing the host I/O SBB

Installation and Maintenance 3-29

Replacing a Power Supply SBB

CAUTION: When you remove a power supply, the airflow through the shelf is

reduced. Always install the replacement unit immediately to prevent overheating.

You can replace an AC power supply without affecting shelf operation using the following procedure:

1. Remove the AC input power cable from the 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 foursecond intervals. Make sure the LEDs on both the power supply and the storage devices indicate normal operation.

3-30 RAID Array 3000 Controller Shelf Hardware User’s Guide

Replacing the RAID Controller

CAUTION: When you remove the controller, the airflow through the 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. 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. Remove the controller by sliding it forward and free of the shelf.

4. Transfer the SIMMs to the new controller.

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.

HR-1

062

Figure 3-17. Removing the controller from the shelf

Installation and Maintenance 3-31

Replacing the UPS

Proceed as follows to replace the UPS:

1. Ensure the UPS power 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 screws that secure the front panel of the UPS to the cabinet.

6. Remove the UPS.

7. Install the replacement UPS and replace the screws removed in step 5 to

secure the unit.

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

9. Set the UPS output voltage level to your specific AC power source.

10. Set the UPS power switch to On, set the UPS low-battery warning

option to five minutes (refer to UPS manual), and then power-up the shelf.

Replacing a Blower

WARNING: Only qualified service personnel should access the 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 turns 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 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).

CAUTION: The blowers are dual-speed devices and should be replaced only with identical units.

Shelf airflow is lost when a blower is removed. Replace immediately or damage can result.

3-32 RAID Array 3000 Controller Shelf Hardware User’s Guide

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 the 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 blower assembly

5. Insert the safety screw.

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

the LEDs.

Installation and Maintenance 3-33

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 the 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 assembly are not off and all shelf power supplies are operating, the second blower could have failed or the wrong blower was replaced.

Replacing the Controller Memory Cache Modules

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

CAUTION: To prevent an electrical discharge from damaging the SIMMs, always wear an ESD wrist strap connected to a suitable ground when handling the memory chips.

3-34 RAID Array 3000 Controller Shelf Hardware User’s Guide

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

the UPS.

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

until the controller disengages from the shelf (see Figure 3-17).

3. Remove the controller from the shelf and place it 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 3-19 and 3-20.

HR-104

Cache M

emo

Modules

Figure 3-19. Controller cache modules

Figure 3-20. Release locking clips

Installation and Maintenance 3-35

Figure 3-21 shows how to remove the installed SIMM module.

Figure 3-21. Remove installed SIMM modules

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

5. Install the two replacement memory modules by aligning the module

and connector pins (check alignment guide in center of module) and gently pivot the module into the main controller board until it snaps into place (see Figures 3-19 and 3-20).

6. Replace the controller into the shelf.

7. Power On the UPS and then power On the controller shelf.

3-36 RAID Array 3000 Controller Shelf Hardware User’s Guide

8. Check the activity LEDs on the front panel of the controller. The reset

switch/LEDs should begin to flash at a half-second rate (heartbeat) and the host activity LEDs should flash.

Figure 3-22. Install replacement SIMM

Figure 3-23. Pivot SIMM down to secure

Chapter 4

Second Controller Option

This chapter describes how to install a second RAID controller in the RAID Array 3000 Controller Shelf (controller shelf). The second controller option adds a fail/safe feature to your storage subsystem. The chapter also contains a procedure describing how to configure the subsystem for dual-controller operation when only one serial port is available on the host.

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 controller shelf.

The installation procedure consists of adding two Single Inline Memory Module (SIMM) 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.

4-2 RAID Array 3000 Controller Shelf Hardware User’s Guide

Perform an inventory of the items contained in the second controller kit option. In addition to this guide the kit should contain the following:

■ Controller

■ For option kit DS-HSZ22-AA, 3 SIMMs

■ For option kit DS-HSZ22-AB, 4 SIMMs

■ Model label

■ Warranty card

Installing the Upgrade

CAUTION: To prevent an electrical discharge from damaging the SIMMs,

always wear an ESD wrist or foot strap connected to a suitable ground when handling the memory modules.

NOTE: You can upgrade your firmware using the SCSI or network connection methods. These methods provide the fastest way to upgrade your firmware. To update your controller’s firmware, proceed as follows.

HP StorageWorks 3000 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual