Compaq StorageWorks 4000 - RAID Array User's Guide

User GuideFourth Edition (June 1999)Part Number 241377-004Compaq Computer Corporation

x Compaq StorageWorks RAID Array 4000 User GuideThese symbols may be found in the text of this guide. They have the followingmeanings. Text set off

Running the Array Configuration Utility If your operating system is not listed, check your operating systemdocumentation or contact your operating sy

Compaq StorageWorks RAID Array 4000 User GuideMake the extended space of the logical drive available for use by youroperating system by one of the

Running the Array Configuration Utility 3. Click the Migrate RAID/Stripe Size option button. A screen similar tothe following is displayed.Figure 6-

Compaq StorageWorks RAID Array 4000 User GuideRedundant pairs of Raid Array 4000 Controllers are marked with a specialicon and label in the Array C

Running the Array Configuration Utility The main configuration screen is the first screen that displays after theconfiguration wizard finishes. Some

Compaq StorageWorks RAID Array 4000 User GuideThe menu bar contains the following pull-down menus: Controller—Use to select a controller, save a c

Running the Array Configuration Utility Figure 6-16. View Configuration listFor each controller, the drive arrays, logical drives, and physical driv

Compaq StorageWorks RAID Array 4000 User GuideThe More Information button, shown in Figure 6-17, is located at the bottomright side of the screen.

Running the Array Configuration Utility The Array box is located on the right side of the screen, below the Controllerbox. The Modify, Expand, and Cr

Compaq StorageWorks RAID Array 4000 User GuideUse the Controller Settings screen to select the operating system and to set theRebuild Priority, Exp

About This Guide xiAny surface or area of the equipment marked with these symbolsindicates the presence of a hot surface or hot component. If thissu

Running the Array Configuration Utility The Accelerator Ratio determines the amount of memory allocated to the readand write caches. Some application

Compaq StorageWorks RAID Array 4000 User GuideTo increase performance, Compaq reconnects installing/distributing drives toboth ports before running

Running the Array Configuration Utility In this screen, you can select the fault-tolerance method, enable the arrayaccelerator, set the logical drive

Compaq StorageWorks RAID Array 4000 User GuideThis screen first displays the maximum size logical drive that can be createdfor your drive array. Yo

Running the Array Configuration Utility When you start the Array Configuration Utility, the software checks eachcontroller to detect errors in its co

Compaq StorageWorks RAID Array 4000 User GuideIf no logical drives are configured, a CPQONLIN auto-configuration wizard(Figure 6-24) appears and pr

Running the Array Configuration Utility Custom configuration allows you to create arrays and assign fault toleranceone array at a time. To custom con

Compaq StorageWorks RAID Array 4000 User GuideTo set the drive rebuild priority, expand priority, or accelerator ratio for acontroller, highlight t

Running the Array Configuration Utility To set the drive rebuild priority, highlight the RA4000 controller and select thecontroller settings. If you

Compaq StorageWorks RAID Array 4000 User GuideUsing CPQONLIN, you can modify both the RAID level and Stripe Size of anexisting logical drive while

xii Compaq StorageWorks RAID Array 4000 User GuideIn North America, call the Compaq Technical Phone Support Center at1-800-OK-COMPAQ1. This service

Running the Array Configuration Utility Rebuilding: The array is operating and rebuilding a replacement drive oran online spare, if one was assigne

Compaq StorageWorks RAID Array 4000 User Guide 6. NetWare cannot detect a single physical drive failure when usinghardware-based fault tolerance; N

The Options ROMPaq utility is used to update the firmware on the RA4000Controller and hard drives. Use Options ROMPaq to update the capabilities ofthe

Compaq StorageWorks RAID Array 4000 User Guide 7. Press Enter to go to step 9. or 8. If the ROM firmware in the RA4000 Controller is older than tha

For the purpose of regulatory compliance certifications and identification, yourStorageWorks RAID Array 4000 is assigned a Compaq Series number. TheCo

Compaq StorageWorks RAID Array 4000 User GuideThe FCC requires the user to be notified that any changes or modificationsmade to this device that ar

Regulatory Compliance Notices The GigaBit Interface Converter (GBIC) module contains a laser device. AllCompaq systems equipped with a laser device c

Compaq StorageWorks RAID Array 4000 User GuideAugust 2, 1976. These regulations apply to laser products manufactured fromAugust 1, 1976. Compliance

Regulatory Compliance Notices Your RA4000 is provided with a Lithium Manganese Dioxide, or a VanadiumPentoxide, batteries. There is a danger of exp

To prevent damage to the system, be aware of the precautions you need tofollow when setting up the system or handling parts. A discharge of staticelec

The Compaq StorageWorks RAID Array 4000 is a high-performance, externalsystem using various Fibre Channel devices and the Fibre Channel I/OStandard to

Compaq StorageWorks RAID Array 4000 User GuideThere are several methods for grounding. Use one or more of the followingmethods when handling or ins

This appendix provides operating and physical specifications for the CompaqRA4000 (Tower) and the Compaq RA4000 (Rack-mountable).Dimensions (including

Compaq StorageWorks RAID Array 4000 User GuidecontinuedTemperature RangeOperatingShipping50° to 95° F-22° to 122° F10° to 35° C-30° to 50° CRelativ

Specifications continuedTemperature RangeOperatingShipping50° to 95° F-22° to 122° F10° to 35° C-30° to 50° CRelative Humidity (noncondensing)Operati

The information in this appendix defines Fibre Channel, describes itsadvantages, and outlines how it is in the Compaq StorageWorks RAIDArray 4000.Fibr

Compaq StorageWorks RAID Array 4000 User Guideq Up to 126 ports per Arbitrated Loopq Smaller cables and connectorsq No bus termination requiredq

Fibre Channel Technology The simplest connection method for Fibre Channel cable is the point-to-pointconnection between a server and an external RA40

Compaq StorageWorks RAID Array 4000 User Guide One Compaq Fibre Channel cableq Multi-mode for distances of 2 meters to 500 metersq 2-meter multi

Fibre Channel Technology Figure D-2 shows a Fibre Channel Arbitrated Loop configuration with oneserver, one Storage Hub, and two RA4000(s).12345678Fi

Compaq StorageWorks RAID Array 4000 User Guide1Server2Fibre Host Adapter3Fibre Channel Storage Hub4RA4000 Controller 15RA4000 16RA4000 Controller 2

Compaq StorageWorks RAID Array 4000 User Guiden Wide-Ultra SCSI-3, Fast-Wide SCSI, or Fast SCSI-2 hard drive supportn Redundant Hot-pluggable Pow

Fibre Channel Technology One Compaq Fibre Channel cableq Multi-mode for distances of 2 meters to 500 metersq 2-meter multi-mode Fibre Channel cab

Compaq StorageWorks RAID Array 4000 User GuideData is sent over Fibre Channel cable in a structured format. The smalleststructure of data sent is c

Fibre Channel Technology Figure D-4 shows the structure of Fibre Channel data transmission.ExchangeSequenceDataFibre ChannelFrameSequence 1Sequence 2

Compaq StorageWorks RAID Array 4000 User GuideFigure D-5 shows the relationship between the Fibre Channel layers.FC-4FC-3Common ServicesFC-2Framing

The information in this appendix describes hard drive array concepts, dataprotection methods, including fault-tolerance options, and data reliabilityf

Compaq StorageWorks RAID Array 4000 User GuideDaz-9-12.EPSPhysicalDrive 1PhysicalDrive 2PhysicalDrive 3LogicalDrive 1LogicalDrive 2Drive ArrayFigur

Hard Drive Arrays Figure E-3 illustrates a larger array with two logical drives across six physicaldrives.Daz-9-16.EPSPhysical DrivesLogicalDrive 1Lo

Compaq StorageWorks RAID Array 4000 User GuideDrive arrays have several important attributes: A single array cannot span more than one RA4000 Cont

Hard Drive Arrays Data protection Performance enhancement Capacity changes Data reliabilityThe RA4000 Controller provides several options to pro

Compaq StorageWorks RAID Array 4000 User Guide67% to 93% 67% to 93% 50% 100%(n-1)/n (n-1)/n n/2 nParitydistributedover eachdriveDedicatedparity dri

Introduction Form FactorsTower19-inch rackModelsTowerRack-mountableControllerRAID 0, 1, 4, and 564-MB Read/Write CacheMaximum Number of Drives12 (1-i

Hard Drive Arrays If you will be storing non-critical data, and space and performance are bothimportant, RAID 0 offers the best of both parameters. H

Compaq StorageWorks RAID Array 4000 User GuideData guarding, also called RAID 4, assures data reliability while using only asmall percentage of the

Hard Drive Arrays Drive mirroring, also called RAID 1, is the highest performance fault-tolerance method. RAID 1 is the only option offering fault-to

Compaq StorageWorks RAID Array 4000 User Guide Disk failure will result in data loss for all RAID 0 logical drives. You cannot assign an online s

Hard Drive Arrays RAID 0 16, 32, 64, 128, , 512RAID 1 16, 32, 64, 128, , 512RAID 4 16, , 64, 128RAID 5 16, , 64, 128For example, consider an oper

Compaq StorageWorks RAID Array 4000 User GuideBy serving as a posted write cache and read-ahead cache, the array acceleratordramatically improves t

Hard Drive Arrays The array accelerator contains batteries that maintain any data cached there if asystem power failure occurs. The batteries can pre

Compaq StorageWorks RAID Array 4000 User GuideConsider the following example. The RA4000 controller receives a request fora physical drive that is

Hard Drive Arrays Daz-9-14.EPSOriginalLogicalDriveAddedPhysicalDrivesData from original logical drive redistributed over "Top" of allphysic

Compaq StorageWorks RAID Array 4000 User GuideIt is important to remember that all physical drives in an array should be thesame size (capacity). T

Compaq StorageWorks RAID Array 4000 User GuideFigure 1-3 shows the front panel controls accessible to the user. Therack-mountable model has the LED

Hard Drive Arrays The RA4000 Controller and the network operating system offer several otherfault management and data reliability features, including

Compaq StorageWorks RAID Array 4000 User Guideserver to determine what drive failure features are included on your servermodel.Other Compaq options

The purpose of fault-tolerant configurations on the Compaq RA4000Controller is to protect against data loss due to drive failure. Although theRA4000 C

Compaq StorageWorks RAID Array 4000 User Guide Array Diagnostic Utility (ADU) will list all failed drives. An onlineversion on ADU is also availab

Recovering From Hard Drive Failure Will be in a “regenerating” condition if at least one drive is failed, andno failed drives are mirrored to one a

Compaq StorageWorks RAID Array 4000 User GuideFailed drives in hot-pluggable trays can be removed and replaced while hostsystem and storage system

Recovering From Hard Drive Failure During Automatic Data Recovery, if the online LED of the replacement drivestops blinking and all other drives in t

accelerator ratio 6-27, 6-35ACU 1-9, D-4, D-7, E-16Capacity Expansion 1-11configuring hardware 1-10disabling ArrayAccelerator 1-11running

2 Compaq StorageWorks RAID Array 4000 User GuideArray Diagnostic Utility F-2Array Diagnostics Utility 1-9arrays See also hard drives, arraysad

Index 3considerations E-15definition 1-11, E-14example E-15hard drive upgrade E-16online 1-9, 1-11, E-16capacity extensiondefined 6-16exi

Introduction Figure 1-4 shows the features and accessible components on the rear panel.12345Figure 1-4. Rear panel features (tower model shown)1Powe

4 Compaq StorageWorks RAID Array 4000 User Guidedrive rebuild 6-34set priority 6-35NetWare Online ArrayConfiguration Utility 6-31optimizing ar

Index 5drive trays 2-14drive view box, ArrayConfiguration Utility 6-24driversinstalling 2-18operating system D-4, D-7installing 2-3drivesba

6 Compaq StorageWorks RAID Array 4000 User Guidetechnology D-1Fibre Channelpoint-to-point D-2standardsprotocol layers D-9Fibre Channel Arbitra

Index 7inserting the drive 4-27installing the FanAssembly 4-23installing the powersupply 4-21installing the RA4000Controller 4-12, 4-14instal

8 Compaq StorageWorks RAID Array 4000 User Guideeffect on performance E-7, E-8procedure 4-26SCSI 1-13, 2-1securing 2-15, 4-27spare F-3supp

Index 9Power and Fault LEDs on theStorage Hub 12 4-7power supply LED 4-10power supply LEDs 3-3RA4000 Controller LEDs 4-4removing the FanAssem

10 Compaq StorageWorks RAID Array 4000 User Guideexpansion wizards,illustrated 6-15rebuilding 6-36logical volumes See drives, logicallogical/p

Index 11help 6-4RAID level migration,example 6-18RAID level migration,manual 6-18running Array ConfigurationUtility 6-3stripe size migration,

12 Compaq StorageWorks RAID Array 4000 User Guideredundant 1-2, 1-6, 1-13, 2-22aligning 5-3function 5-1installing 5-2power cord 5-3replaci

Index 13failure F-2RAID 1 1-10advantages E-6, E-9automatic data recovery E-18auto-reliabilitymonitoring E-17definition E-5failure F-2in

Compaq StorageWorks RAID Array 4000 User GuideHot-pluggability refers to the ability to remove and replace componentswithout powering down the syst

14 Compaq StorageWorks RAID Array 4000 User GuideStorageWorks RAID Array 4000configuring 2-1stripe sizedefined 6-30fault tolerance 6-30screen,

Introduction The Compaq RA4000 supports these Compaq hot-pluggable drives:n 1.6-inch Fast SCSI-2n 1.6-inch Fast-Wide SCSI-2n 1.6-inch Wide-Ultra S

The information in this publication is subject to change without notice.COMPAQ COMPUTER CORPORATION SHALL NOT BE LIABLE FOR TECHNICAL OREDITORIAL ERRO

Compaq StorageWorks RAID Array 4000 User GuideEach device on a SCSI bus must have a unique identification number in therange of 0 to 6. The SCSI ID

Introduction The RA4000 Controller is a drive array controller designed for installation inthe RA4000. The RA4000 Controller supports Wide-Ultra SCSI

Compaq StorageWorks RAID Array 4000 User GuideDrive array technology distributes data across a series of hard drives to unitethese physical drives

Introduction Capacity Expansion refers to the ability to add storage capacity to an existingarray by adding hard drives.The Array Configuration Utili

Compaq StorageWorks RAID Array 4000 User Guide The rechargeable batteries on a new RA4000 Controller can be dischargedwhen the board is first inst

Introduction System power in the Compaq RA4000 does not shut off completely with thepower switch. The two positions of the front panel power switch s

This chapter provides information about the installation and configuration ofthe Compaq StorageWorks RAID Array 4000. Because of the similarities bet

Compaq StorageWorks RAID Array 4000 User Guide Compaq StorageWorks Fibre Channel Host Adapter/P or CompaqStorageWorks Fibre Channel Host Adapter/E

Installation To install the Compaq StorageWorks RAID Array 4000, you will need to: 1. Choose a location. 2. Install the RA4000 in the rack (rack mode

Compaq StorageWorks RAID Array 4000 User GuideChoose an installation location with the following features: A sturdy, level surface—preferably on o

Text Conventions...ixSymbols in Text...

Installation Before beginning these procedures, make sure you understand the followingwarnings and caution: To reduce the risk of personal injury or

Compaq StorageWorks RAID Array 4000 User GuideWhen installing your Compaq RA4000 in a rack, certain temperaturestandards and power requirements mus

Installation For proper operation and safety, this equipment is required to be groundedproperly in accordance with NFPA 70-1993, Article 250. All pow

Compaq StorageWorks RAID Array 4000 User GuideTo ensure continued safe and reliable operation of the equipment, locate thesystem in a well-ventilat

Installation The Rack-Mountable Compaq RA4000 draws cool air in through the frontdoor and exhausts warm air out through the rear of the server. There

Compaq StorageWorks RAID Array 4000 User GuideTo install the rack-mountable RA4000 in a 19-inch rack, you must performthese steps. 1. Remove any bl

Installation 6. Use the reverse side of the template to mark the equivalent mountingholes (marked C) on the rear mounting rails of the rack cabinet.

Compaq StorageWorks RAID Array 4000 User Guide 10. Identify the front of the right and left mounting brackets. The tabs helpalign the bracket for c

Installation 12. Attach the brackets to the rear mounting rails with the two screwsprovided. Tighten the screws securely.Top ViewRailTROJ035.epsFigu

Compaq StorageWorks RAID Array 4000 User GuideTo install the Hot-Pluggable drives into the RA4000: 1. Open the front door of the RA4000 (tower only

iv Compaq StorageWorks RAID Array 4000 User GuideChapter 2Materials Needed...

Installation 5. Slide the drive into the bay as far as it will go. Make sure the ejectorlevers are in the fully open position to ensure a correct la

Compaq StorageWorks RAID Array 4000 User GuideThe StorageWorks RAID 4000 supports the Storage Hub 7 or the StorageHub 12.The Storage Hub 7 provides

Installation The Storage Hub 12 provides a central point of connectivity for the FibreChannel Arbitrated Loop and should be mounted in a convenient l

Compaq StorageWorks RAID Array 4000 User Guide 2. Refer to the Compaq StorageWorks Fibre Channel Host Bus AdapterInstallation Guide for installatio

Installation Two types of GBIC option kits are available. The option kits: Shortwave option kit #234459-B21 for distances of 2-500 meters Longwave

Compaq StorageWorks RAID Array 4000 User GuideTo customize your system with multi-mode Fibre Channel cable at distancesof 15 meters to 500 meters,

Installation Figure 2-13. Cable management using cable tiesBe sure to route the power and Fibre Channel cables so that access to thepower supply and

Compaq StorageWorks RAID Array 4000 User GuideAfter all hardware components are installed and the unit is in place, the powercan be connected. 1. P

This section describes the operational features of the Compaq StorageWorksRAID 4000.Before applying power to the RA4000, all components of the storage

Compaq StorageWorks RAID Array 4000 User GuideThe front panel LEDs are found on the RA4000.TROJ017.EPS21Figure 3-1. Front panel LEDs1Power Green S

About This Guide vChapter 4Interpreting Component LEDs ... 4-1Hard Dri

Operation The LEDs shown in Figure 3-2 apply only to the power supply on which theyare located.1122Figure 3-2. Power supply LEDs1Status Amber Fault

Compaq StorageWorks RAID Array 4000 User GuidecontinuedGreen No fault detected inthis power supply.2AC Power Green AC power isconnected to thispowe

Operation The fan assembly LED applies only to that module.Figure 3-3. Fan Assembly LEDStatus GreenAmberOffFans running normally.Fault detected in o

Compaq StorageWorks RAID Array 4000 User GuideThe hard drive LEDs apply to the hard drive on which they are located.Figure 3-4. Hard drive LEDsGre

This chapter contains troubleshooting procedures and suggestions that shouldbe followed to diagnose problems quickly and to minimize their impact on t

Compaq StorageWorks RAID Array 4000 User Guide Failure to observe the instructions in this section can result in loss ofdata.Look for an amber Dri

Troubleshooting The Fibre Host Adapter has two status LEDs. The Transmit LED 1 indicatesthat the Fibre Host Adapter is transmitting data over the Fib

Compaq StorageWorks RAID Array 4000 User GuideDuring normal runtime, the RA4000 Controller has 18 LEDs that indicateactivity or malfunction of the

Troubleshooting continued9 Active/Standby ON=Controller is activeOFF=Controller is in standby10 WCXC active ON = Cache transfers are active11 Logical

Compaq StorageWorks RAID Array 4000 User GuideThe Fibre Channel Storage Hub 7 has two rows of LEDs. The top green LEDis lit when a GBIC is installe

vi Compaq StorageWorks RAID Array 4000 User GuidecontinuedArray Configuration Utility Screens...

Troubleshooting When power is applied, all LEDs will turn on during the self test, which lasts15 to 60 seconds. After the power self test, the Power

Compaq StorageWorks RAID Array 4000 User GuideThe lower amber LED is the Bypass Port LED, which indicates that theassociated port is in bypass mode

Troubleshooting Failure to follow the instructions in this section can result incomponent damage.If the fan assembly LED is amber, the fan assembly

Compaq StorageWorks RAID Array 4000 User Guide Failure to follow the instructions in this section can result in loss ofdata.If the power 1 and sta

Troubleshooting It is important to follow these instructions when replacingcomponents in the RA4000. If the procedure is done improperly, it is pos

Compaq StorageWorks RAID Array 4000 User Guide 7. Remove the RA4000 Controller by pulling it straight out of thechassis 3.1123Figure 4-13. Removin

Troubleshooting 13. Power up the servers attached to the RA4000.The fault LED on the front panel of the RA4000 should now be green,indicating a full

Compaq StorageWorks RAID Array 4000 User Guide 4. Remove the RA4000 Controller by pulling it straight out of thechassis 3.1123Figure 4-16. Removin

Troubleshooting Replacing the RA4000 Controller cache with the same size cache does notrequire that you power down the system. If the cache is upgr

Compaq StorageWorks RAID Array 4000 User Guide 5. Twist the latch that is holding the daughterboard to the RA4000Controller 90 degrees to allow the

About This Guide viiAppendix CRA4000 (Tower)...C

Troubleshooting 21Figure 4-20. Installing the daughterboard 9. With the daughterboard installed, push the RA4000 Controller in as faras it will go 1

Compaq StorageWorks RAID Array 4000 User GuideIf a GBIC fails, follow this procedure to replace the failed GBIC. It is notnecessary to power down t

Troubleshooting If a Fibre Channel cable fails, follow this procedure to replace the failed cable.It is not necessary to power down the system. 1. Re

Compaq StorageWorks RAID Array 4000 User Guide 1. Unplug the power cord for the failed power supply. 2. Press the latch on the power supply handle

Troubleshooting 3. With the handle fully open, insert the replacement power supply into theopening and slide it in along the rails as far as it will

Compaq StorageWorks RAID Array 4000 User Guide Do not operate the RA4000 for extended periods of time with eitherpower supply location open. Inter

Troubleshooting 1. Loosen the two thumbscrews 1 securing the Fan Assembly to thechassis. 2. Remove the Fan Assembly by pulling it straight out of th

Compaq StorageWorks RAID Array 4000 User GuideThe three fans should start turning immediately. The status LED on the FanAssembly and the fault LED

Troubleshooting OK to remove failed driveDO NOT remove driveDO NOT remove driveDO NOT remove drivetroj016.EPSOK to remove drive if not partof fault-t

Compaq StorageWorks RAID Array 4000 User GuideTo replace a drive:Be sure that the Online and Drive Access LEDs are both OFF. SeeFigure 4-10. 1. Squ

viii Compaq StorageWorks RAID Array 4000 User GuideAppendix FRecognizing a Drive Failure...

Troubleshooting 5. Close both latches against the front of the drive until they snap intoplace 1. Levers on each latch should catch behind the metal

The Redundant Power Supply option provides a second power supply tosupplement the standard supply so that one is always online.Because this is a hot-p

Compaq StorageWorks RAID Array 4000 User Guide Be careful when working around the power and Fibre Channelcables on the back of a working RA4000. A

Installing the Redundant Power Supply Option 3. Align the power supply with the rail in its opening and push the supplyin as far as it will go 1. 4.

This chapter provides instructions for using the Compaq Array ConfigurationUtility (ACU) and describes methods for configuring your controller quickly

Compaq StorageWorks RAID Array 4000 User Guide Error and Warning Messages NetWare Online Array Configuration UtilityThe Array Configuration Utili

Running the Array Configuration Utility If the server you are configuring is running Windows NT, you can install andrun the Array Configuration Utili

Compaq StorageWorks RAID Array 4000 User GuideWhen the Array Configuration Utility is started, the software checks theconfiguration of the RA4000 a

Running the Array Configuration Utility If you are configuring a new array, the configuration wizard leads you throughthe process. You can, however,

Compaq StorageWorks RAID Array 4000 User Guide 2. Select one of the listed controllers.Figure 6-1. Controller Selection list 3. Click the Controll

This guide is designed to be used as step-by-step instructions for installationand as a reference for operation, troubleshooting, and future upgrades.

Running the Array Configuration Utility The controller setting screen displays, as shown in Figure 6-3. 4. Select the correct operating system on the

Compaq StorageWorks RAID Array 4000 User Guide 1. Click the Create Array button. The Create Drive Array screen appears.Figure 6-4. Create Drive Ar

Running the Array Configuration Utility 3. Select the drive at Port 1:SCSI ID 3 and click the Assign Spare to Arraybutton update as advised. The Cre

Compaq StorageWorks RAID Array 4000 User Guide 4. Click the Done button to return to the Main Configuration screen. TheLogical Configuration View a

Running the Array Configuration Utility When creating a logical drive, you can select a fault-tolerance (RAID level)option and provide information re

Compaq StorageWorks RAID Array 4000 User Guide 6. The Logical Drive Size area includes a graphical representation of thestorage capacity available.

Running the Array Configuration Utility Capacity expansion involves adding storage capacity to an array that hasalready been configured. If an existi

Compaq StorageWorks RAID Array 4000 User GuideFor this example, assume a configuration similar to the previous one, exceptthat the fourth 4.3-GB dr

Running the Array Configuration Utility 5. Click the Next button at the bottom of the screen. A screen similar to thefollowing figure is displayed.F

Compaq StorageWorks RAID Array 4000 User Guide 9. At the main screen, select Controller, Save Configuration from themenu bar. This saves the new se