Compaq StorageWorks 4000 - RAID Array Quick reference guide

White Paper
July1999
0206-0699
Prepared byStorage Products
Division
Compaq Computer Corporation
Contents
Fibre Channel Storage
Systemto RAID Array4000........3
The RA4000 Storage System......3
Fibre Channel Host Adapter......3
Gigabit Interface Converters......4
Fibre Channel Storage Hubs.....4
RAID Array 4000........................5
RA4000 Controller.....................5
Deploying the RA4000.................6
Upgrading fromFCSS to
RA4000......................................6
Configuration Scenarios............7
Single Server/Single
Controller...................................8
Dual Servers/Single
Controller...................................9
Single Server/Dual
Controllers...............................10
Dual Servers/Dual
Controllers...............................11
Firmware....................................12
Operating Systems
Supported..................................12
Upgrading fromSingle
ControllerSolutions..................13
Windows NT 4.0 Installation
Instructions..............................13
NetWare Installation
Instructions..............................13
RA4000 Configuration...............14
Array Configuration Utility........14
Fibre Fault Isolation Utility........15
Compaq Redundancy
Manager (NT)..........................16
Compaq RAID Array 4000
Storage System: Deployment
and Configuration
Abstract:As the performance ofprocessors and peripherals
improves and companies increasinglymove to distributed
architectures while consolidating servers, the company's
administrators generate high-speed and data intensive network
applications. As a result, interconnects between servers and the I/O
devices theysupport have becomea management bottleneck.
Fibre Channel storage solutions shatter distance, connectivity,
capacity, and bandwidth limitations of SCSI. Fibre Channel allows
highlyscalable, high-performance storage solutions for the most
demandingapplications.Compaq believes Fibre Channel is the best
interconnect technologychoice for future storage solutions and has
developed the RAIDArray4000 (RA4000)Storage System, which is
based on this technology.
This paperdescribes how to:
 Upgrade an existing single controller Fibre Channel Storage
Systemtothe dual controllerRA4000
 Install an RA4000 with eithersingle ordual controllers
 Deployfull redundancywith eithera Fibre Channel Storage
Systemoran RA4000
Formore information onFibre Channel technology,go to
http://www.compaq.com/products/servers/storage/fibre.html

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Notice
The information in this publicationis subject to change without notice and is provided “ASIS” WITHOUT
WARRANTY OFANY KIND. THE ENTIRE RISK ARISING OUT OFTHE USE OFTHIS
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ANY DIRECT, CONSEQUENTIAL, INCIDENTAL,SPECIAL, PUNITIVE OR OTHER DAMAGES
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PROFITS, BUSINESS INTERRUPTION OR LOSS OF BUSINESS INFORMATION), EVEN IF
COMPAQ HAS BEENADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
The limited warrantiesfor Compaq products are exclusively set forth in thedocumentation accompanying
such products. Nothingherein should be construed as constitutinga furtheror additionalwarranty.
Thispublicationdoes not constitute an endorsement ofthe product or products that were tested. The
configuration or configurationstestedor described mayor maynotbe theonlyavailable solution. Thistest
is not a determination or productqualityor correctness, nor does itensure compliance with anyfederal,
state, or localrequirements.
Product namesmentioned herein maybe trademarks and/or registered trademarks oftheir respective
companies.
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Copyright ©1999 CompaqComputer Corporation. All rights reserved. Printed in the U.S.A.
Compaq RAID Array4000 Storage System: Deployment and Configuration
White Paper prepared byStorage ProductsDivision
First Edition (July1999)
Document Number 0206-0699

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Fibre Channel Storage System to RAID
Array4000
The Compaq StorageWorks RAIDArray4000 (RA4000),formerlythe Fibre Channel Storage
System(FCSS), is an external storage solution incorporating Fibre Channel interconnect
technology. Compaq changed the name of the FCSS to the RA4000 toclearlyposition this
product within our line of external storage solutions and leverage the new rebranded
Storageworks. None of the functionalityof the FCSS has been reduced, in fact, Compaq has
added significant new features tothe RA4000.
With the RA4000,Compaq has implemented redundant controllersupport forboth the RA4000
and the FCSS forWindows NT4.0 and NetWare 4.x and 5.x.Redundant controllersupport
allows fordual fibre loop configurations and furtherreduces both planned and unplanned
downtime.
The FCSS controllerboard contained 32 megabytes ofcache forsystems manufactured before
September 15, 1998, and 64 megabytes of cache for systems manufactured after
September15,1998.The controllerboard forthe RA4000 system features 64 megabytes of
cache. With both systems, the arraycontroller is housed in the external storage cabinet. With the
RA4000, the customer can utilize two controller cards with the accompanying software.
The RA4000 Storage System
In its base configuration,an RA4000 storage system consists of the following components:
•AFibre Channel Host Adapter(installed in a Compaq X86 server)
•AFibre Channel StorageHub and required Fibre Channel interconnects
•One ormore RA4000s shipped standard with RA4000 Controllers
Adescription of each component is detailed in the sections below.
Fibre ChannelHost Adapter
The Compaq Fibre Channel Host Adapter is a high-speed host interface that provides
connectivityfromthe server to one ormultiple RA4000s via a Fibre Channel StorageHub.
The adapter is available in either a PCIversion or an EISAversion. The Fibre Channel Host
Adapter/P is a 33 MHz 32-bit PCIbus master device. The Fibre Channel Host Adapter/E is for
use in a serverequipped onlywith an EISA expansion bus orwith a server that has a majorityof
EISAbus slots. The Fibre Channel Host Adapter/E takes advantage of the EISAarchitecture by
performing32-bit bus masterburst transfers.
IMPORTANT: Both the PCIand EISAversions of the Fibre Channel Host Adapterrequire
installation of a gigabit interface converter module into the I/O port before the multi-mode fibre
cable is connected.

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GigabitInterface Converters
Gigabit interface converters(GBICs)are industry-standard connection devices that hot pluginto
Fibre Channel storage hubs and controllers.AGBIC converts serial electrical signals toserial
optical signals for bi-directional transmission of data across the Fibre Channel media.
GBICs are available in two varieties:
•Short wave (GBIC-SW)–Forconnections up to500 meters.AGBIC-SWprovides a
transmission rate of100 megabytes persecond at distances up to500 meters using
50-micron, multi-mode fiber optic cables. 62.5-micron, multi-mode fiber optic cable is
alsosupported,but distances are limited to300 meters.
•Long wave (GBIC-LW)–For connections between 500 meters and 10 kilometers. A
GBIC-LWprovides a transmission rate of 100 megabytes per second at distances up to
10 kilometers of 9-micron, single-mode fiber optic cable. GBIC-LW are not currently
supported on Microsoft Cluster Server configurations.
Note: GBICs on both ends of anyFibre Channel cable link must be the same type. For example,
GBIC-SWmust link to GBIC-SWand GBIC-LWmust link toGBIC-LW. Intermixing short
wave types and long wave types on anysingle link is functionallyincompatible.
Fibre ChannelStorage Hubs
Fibre Channel Storage Hubs accept different cable types, allowing for intermixed cable pairs
within a topology, and use port bypass circuitrytokeep a Fibre Channel loop topologyintact.The
RA4000 can be configured usinga Fibre Channel StorageHub 7 ora Fibre Channel Storage
Hub 12.
FibreChannel Storage Hub 7
The Compaq Fibre Channel StorageHub 7 is a seven-port hub that creates a
100-megabytes-per-second Fibre Channel Arbitrated Loop through its internal wiring and logic.
Note: GBICs on both ends of anyFibre Channel cable link must be the same type. For example,
GBIC-SWmust link to GBIC-SWand GBIC-LWmust link toGBIC-LW. Intermixing short
wave types and long wave types on anysingle link is functionallyincompatible.
AFibre Channel StorageHub 7 is capable ofsupporting:
•Up tosixRA4000s perhub
•Up to72 spindles perserver slot
•Up to1.75 TBper serverslot
•Interconnect distances up to500 meters perlinkusingGBIC-SW
•Interconnect distanced up to10 kilometers per linkusingGBIC-LW

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FibreChannel Storage Hub 12
The Compaq Fibre Channel StorageHub 12 is an intelligent, 12-port hub similar tothe Fibre
Channel Storage Hub 7.
AFibre Channel StorageHub 12 is capable ofsupporting:
•Up to11 RA4000s perhub.
•Up to132 spindles perserverslot.
•Up to3.2 TB perserver slot.
•Interconnect distances up to500 meters perlinkusingGBIC-SW.
•Interconnect distances up to10 kilometers perlinkusingGBIC-LW.
RAID Array4000
The RAIDArray4000 (RA4000)is an external drive enclosurecontaininga high-performance
RA4000 Controller,hot-pluggable hard diskdrives, fan assembly, and powersupplies.
The RA4000 allows you tosimultaneouslyscale capacity, cache, and processingpower. Each
RA4000 features optional hot-plugredundant powersupplies and fans.This arraysupports dual
controllers,which provide controllerfailoverredundancy.The RA4000 is available in tower or
4U rackformfactors and supports eight 1.6-inch or twelve 1-inch hard diskdrives fora total of
291.2 GBperenclosure using36.4 GB drives.
The numberofRA4000s that can be deployed in an RA4000 Storage Systemdepends on the
numberand configuration ofthe Fibre Channel StorageHubs.The numberand configuration of
the storage hubs depends on the numberofFibre Channel Host Adapters installed in the server.
Note: The Compaq RA4000 is drive traycompatible with Compaq X86 Servers and ProLiant
Storage Systems (Wide Ultra SCSI-3Hot Plug).
RA4000 Controller
The RA4000 Controller is an intelligent Fibre Channel-to-SCSI arraycontroller integrated into
the RA4000.The controller is based on the Compaq SmartArrayarchitecture and has two
Wide Ultra SCSI-3 channels. Each channel can transfer data at 40 megabytes per second for a
total of80 megabytes persecond possible internal bandwidth.The arraycontroller-to-host
interface is Fibre Channel for high-speed connection to the server. The Fibre Channel interface
can transferdata to the serverat burst rates of100 megabytes per second.
The RA4000 Controllersupports RAID levels 0, 0+1, 1, 4, and 5. Italsosupports multiple logical
drives with hot-swap capabilities and online capacityexpansion within the array. The controller
features sixth-generation Compaq RAID technologyand components and a total of 64 megabytes
of usable cache (16 megabytes read and 48 megabytes user-selectable read/write).
The RA4000 Controllersupports Wide-Ultra SCSI-3,Fast-Wide SCSI-2,orFast SCSI-2 drives.
Use ofSCSItechnologyinside the RA4000 allows customers to use existingSCSIdiskdrives.
Since hard disk drives are the most costlypart of a storage system, this compatibilitycan reduce
the cost ofimplementingan RA4000 Storage System.

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Deploying the RA4000
Upgradingfrom FCSS to RA4000
The RA4000 is an open solution that has been tested,proven,and optimized forseamless
integration and unmatched performance with Compaq X86 servers and critical applications. This
solution features a controller board with 64 megabytes of cache. The controller board in some
Fibre Channel Storage Systems (FCSS) contain 32 megabytes of cache.
Toupgrade yourFCSS toan RA4000,you must:
1.Ensure the cache sizes on your controller pairs are equal. Otherwise, your cache will be
disabled and performance will be reduced. Your alternatives are to pair controllers with either
32 MB or 64 MB caches or to upgrade an existing 32 MB cache controller with a 64 MB
cache. To do so, you must order and install the Compaq Fibre Channel ArrayController
64 MBCache Upgrade Kit (p/n 262398-B21).
IMPORTANT: When upgradingto the RA4000, make sure the cache sizes of the controller
boards match. If the cache sizes do not match, all of the cache will be disabled.
2.Install the new drivers and firmware included on SmartStart 4.3 or later.
3.If you are using Microsoft Windows NT (either clustered or nonclustered installations),
purchase the Compaq ProLiant ClusterHA/F200 kit.
Each integrated RA4000 Controller includes an enhanced ArrayAcceleratorwith a total of
64 megabytes of cache. Of that total, 16 megabytes is dedicated read cache that is integrated on
the base controller board. The remaining 48 megabytes of cache is user-selectable, battery-backed
read/write cache located on a small, removable board that plugs into the base controller.
One majoradvantage ofmigratingfroman FCSS to the RA4000 is that the customercan run two
controller cards, each with 64 megabytes of cache, with available software. In a redundant
configuration, if the active controller or other component fails or becomes inoperative, the
standbycontroller will take over, notifythe systemadministrator of the problem, and maintain
operation ofthe storage subsystem.Unplanned downtime is minimized.
An RA4000 can provide redundancyin eithera single serverenvironment orin a clustered server
environment.
In anytype ofserverenvironment,the RA4000(s)must have dual controllers installed toensure
controllerfailoverredundancy.With single controllers,there is nocontroller redundancyto
protect the data should a component fail.

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ConfigurationScenarios
Systemconfigurations varywidely,but RA4000s with dual controllers can be easilydeployed in
anyscenario with verylittle operating interruption. Customers can increase storage capacityand
achieve redundancyin an endless numberofconfiguration scenarios.Fourcommon
configurations are detailed below.
•Single Server/Single Controller. The system contains one server and one controller per
RA4000.There is noredundancyin this configuration.
•Dual Servers/Single Controller. The system contains two servers and one controller per
RA4000 runningMicrosoft Cluster Server or NetWare HighAvailabilityServer. There is no
storage system redundancyin this configuration.
•Single Server/Dual Controllers.The systemcontains one serverand two controllers per
RA4000 toprovide redundancy. Dual controllers bring controllerfailoverredundancyforthe
system to this scenario.
•Dual Servers/Dual Controllers.The systemcontains twoservers runningMicrosoft Cluster
Server or NetWare HighAvailabilityServer and twocontrollers per RA4000 toprovide
redundancy. Dual controllers and servers bringcontrollerfailoverredundancyforthe system
to this scenario.
Note: Single Server/Single Controller, Dual Servers/Single Controller, Single Server/Dual
Controllers,and Dual Servers/Dual Controllers, are not the onlyRA4000 configuration scenarios.
Systemconfigurations mayvarydependingon the customer’soperatingenvironment.
Incompatibilities in bus and drive mapping exist between Compaq ProLiant Storage Systems and
the RA4000 except for the F2orU2 models.For this reason,data stored on hard drives in a
ProLiant Storage SystemF2or U2 connected to a Smart ArrayController can be migrated
directlyto an RA4000 provided the HDDs are kept in the same physical orderand RA4000
ControllerFW1.14 or later is used.ForProLiant Storage Systems models F1,U1,and UE,
migratingstored data toan RA4000 requires a full backup and restore operation.Referto
www.compaq.com fordetails about migratingtoan RA4000 froma Compaq ProLiant Storage
System using Compaq Smart ArrayControllers.

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Single Server/Single Controller
Figure 1.RA4000 Storage SystemwithSingle Server/Single Controller
Customers deployinga single server or an entirelynew storage system with a single server/single
controllerconfiguration must:
1.Insert a GBIC into the Fibre Channel Host Adapter.
2.Install the Fibre Channel Host Adapter in the server.
3.Insert a GBIC into the Fibre Channel Storage Hub. Use a GBIC-SW if the connection to the
server is 500 meters or less, or a GBIC-LWif the connection to the server is between
500 meters and 10 kilometers.
IMPORTANT: Systems deployingGBIC-SWuse 50-micron,multi-mode fiberoptic cable.
Systems deploying GBIC-LWuse 9-micron,single-mode fiberoptic cable.
4.Connect a Fibre Channel StorageHub to the Fibre Channel Host Adapter.
5.InsertaGBIC intothe arraycontrollerat the RA4000.Use a GBIC-SWifthe connection to
the hub is 500 meters or less, or a GBIC-LWif the connection tothe hub is between
500 meters and 10 kilometers.
Note: The necessaryGBIC and the appropriate fiber optic cable are determined byindividual
customer needs and system design.
6.Connect the RA4000(s)tothe Fibre Channel StorageHub.
Note: In single-server environments,the servercan be connected directlyto the RA4000.
7.Run the Compaq Options ROMPaq. It is provided on the Compaq SmartStart and Support
Software CD 4.30 orlaterthat is shipped with the Compaq StorageWorks RA4000 and
RA4000 Redundant Controller.

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Dual Servers/Single Controller
Figure 2.RA4000 Storage SystemwithDual Server/Single Controller
Customers who onlyrequire a system with a single arraycontroller, maywant the flexibilityof a
system with two servers.
Customers migrating from a single server to a server cluster or deploying an entirelynew storage
system with a dual servers/single controller configuration must:
1.Insert a GBIC into the Fibre Channel Host Adapter.
2.Install the Fibre Channel Host Adapter into the added server or into both servers if the storage
system is entirelynew.
3.Insert a GBIC into the Fibre Channel Storage Hub. Use a GBIC-SW if the connection to the
server is 500 meters or less, or a GBIC-LWif the connection to the server is between
500 meters and 10 kilometers.
IMPORTANT: Systems deployingGBIC-SWuse 50-micron,multi-mode fiberoptic cable.
Systems deploying GBIC-LWuse 9-micron,single-mode fiberoptic cable.
4.Connect a Fibre Channel StorageHub to the Fibre Channel Host Adapters.
5.InsertaGBIC intothe arraycontrollerat the RA4000.Use a GBIC-SWifthe connection to
the hub is 500 meters or less, or a GBIC-LWif the connection tothe hub is between
500 meters and 10 kilometers.
Note: The necessaryGBIC and the appropriate fiber optic cable are determined byindividual
customer needs and system design.
6.Connect the RA4000 tothe Fibre Channel StorageHub.
7.Run the Compaq Options ROMPaq. It is provided on the Compaq SmartStart and Support
Software CD 4.30 orlaterthat is shipped with the Compaq StorageWorks RA4000 and
RA4000 Redundant Controller.

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Single Server/Dual Controllers
Figure 3.RA4000 Storage SystemwithSingle Server/Dual Controllers
Customers whowant a redundant storage system,but donotrequire a servercluster,can deploya
systemcontaininga single server/dual controllerdeployment scenario.
Customers deploying a single server or installing an entirelynew storage system with a single
server/dual controllers configuration must:
1.Insert a GBIC into twoFibre Channel Host Adapters.
2.Install the twoFibre Channel Host Adapters into the server.
3.Insert a GBIC into each of two Fibre Channel Storage Hubs. Use a GBIC-SW if the
connection tothe server is 500 meters orless,ora GBIC-LWifthe connection tothe serveris
between 500 meters and 10 kilometers.
IMPORTANT: Systems deployingGBIC-SWuse 50-micron,multi-mode fiberoptic cable.
Systems deploying GBIC-LWuse 9-micron,single-mode fiberoptic cable.
4.Connect a Fibre Channel Storage Hub to each Fibre Channel Host Adapter.
5.InsertaGBIC intoeach arraycontrollerat the RA4000(s).Use a GBIC-SWifthe connection
tothe hub is 500 meters or less, or a GBIC-LWif the connection tothe hub is between
500 meters and 10 kilometers.
IMPORTANT: One Fibre Channel linkperarraycontrolleris required.
Note: The necessaryGBIC and the appropriate fiber optic cable are determined byindividual
customer needs and system design.

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6.Connect each RA4000 tothe Fibre Channel StorageHub for each controller link.
Note: In single serverenvironments,the servercan be connected directlyto the RA4000.
7.Run the Compaq Options ROMPaq. It is provided on the Compaq SmartStart and Support
Software CD 4.30 orlaterthat is shipped with the Compaq StorageWorks RA4000 and
RA4000 Redundant Controller.
Dual Servers/Dual Controllers
Figure 4.RA4000 Storage SystemwithDual Servers/Dual Controllers
The most common configuration uses a systemcontainingtwoservers and two arraycontrollers.
The dual servers/dual controllers configuration ensures hardwareredundancy.
Customers migrating from a single server to a server cluster or installing an entirelynew storage
system with a dual servers/dual controllers configuration must:
1.Insert a GBIC into twoFibre Channel Host Adapters.
2.Install the twoFibre Channel Host Adapters into the added server or to both servers if the
storage system is entirelynew.
3.Insert a GBIC into each of two Fibre Channel Storage Hubs. Use a GBIC-SW if the
connection tothe server is 500 meters orless,ora GBIC-LWifthe connection tothe serveris
between 500 meters and 10 kilometers.
IMPORTANT: Systems deployingGBIC-SWuse 50-micron,multi-mode fiberoptic cable.
Systems deploying GBIC-LWuse 9-micron,single-mode fiberoptic cable.
4.Connect a Fibre Channel Storage Hub to each Fibre Channel Host Adapter in each server.
5.InsertaGBIC intoeach arraycontrollerat the RA4000(s).Use a GBIC-SWifthe connection
tothe hub is 500 meters or less, or a GBIC-LWif the connection tothe hub is between
500 meters and 10 kilometers.

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IMPORTANT: One Fibre Channel linkperarraycontrolleris required.
Note: The necessaryGBIC and the appropriate fiber optic cable are determined byindividual
customer needs and system design.
6.Connect each RA4000 tothe Fibre Channel StorageHub for each controller link.
7.Run the Compaq Options ROMPaq. It is provided on the Compaq SmartStart and Support
Software CD 4.30 orlaterthat is shipped with the Compaq StorageWorks RA4000 and
RA4000 Redundant Controller.
Firmware
The firmware stored in read onlymemory(ROM)on the RA4000 Controllers defines the features
ofthe RA4000.The firmware controls RAID operation,errorhandling,and management
information as reported to Compaq Insight Manager. The RA4000 ships with the appropriate
firmware loaded. If a customerchooses to install previouslyused diskdrives in an RA4000, the
administrator mayneed to flash the disk ROM to upgrade the firmware on the used disk drives.
Firmware upgrades forthe RA4000 can be flashed ontothe RA4000 ControllerusingCompaq
Options ROMPaq.
The Compaq SmartStart and Support Software CD contains software, drivers, and utilities that
automate the installation of a reliable and well-integrated server configuration. This
easy-to-follow program streamlines server setup, tunes the Compaq server to take full advantage
ofthe hardware and software,and provides consistent serverperformance.
The RA4000 has enhanced drive arraycapabilities. Therefore, Compaq recommends that
customers use the latest Systems ROMPaq to flash the ROM on existing servers before installing
a Fibre Host Adapter.
Systems ROMPaq is a special Compaq utilityfor updatingthe firmware in Compaq servers. It is
provided on the Compaq SmartStart and Support Software CD 4.30 or later.
Operating Systems Supported
The followingoperatingsystems can support the RA4000 in a single controllerconfiguration:
•Windows NT4.0
•NetWare 3.12/3.20,4.11,and 5.0
•UnixWare 2.1 and 7
•SCO OpenServer 5.0
•Banyan Vines 6.xand 7.x
•OS/2 SMP 2.11 and Warp Server
•Solaris 2.5,2.5.1,and 2.6

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The followingoperatingsystems can support the RA4000 in a dual controllerconfiguration:
•Windows NT 4.0 -Microsoft Windows NT Enterprise Edition, Version 4.0, provides
Clustering Services to increase application availability.The Clustering Services allow a
server’s applications to failover to another server in the event of a server hardware, OS, or
application failure. Compaq produced the first fibre channel storage system to receive
certification fromMicrosoft forclusteringsupport,and the Compaq solution has the largest
numberofapproved configurations.
•NetWare 4.11 and 5.0 -NetWare needs little downtime for capacityupgrades because it
allows PCIswitching,capacityexpansion,and volumeextension to be carried out in hot plug
mode. Compaq was the beta platform for NetWareHigh AvailabilityServer, and has the only
fibre channel systemcurrentlyqualified on NHAS.
Upgrading from Single Controller Solutions
WindowsNT4.0 InstallationInstructions
Toinstall the RA4000 usingWindows NT:
1.Shut down the server.
2.Install the redundant components:
•Fibre Channel Host Adapter
•StorageHub (7 or 12)
•Redundant RA4000 Controller
•GBICs and FC cables
3.Boot usingOptions ROMPaq toupgrade FWon all RA4000 Controllers.
4.Install latest NT OS drivers from SSD 2.13.
5.Run the RedundancyManagerInstall CD.
6.Install the OS RedundancyManagersoftware fromCD and reboot.
7.Configure the storage usingCompaq RedundancyManager.
NetWare InstallationInstructions
Toinstall the RA4000 usingNetWare:
1.Shut down the server.
2.Install the redundant hardware components:
•Fibre Channel Host Adapter
•StorageHub (7 or 12)
•Redundant RA4000 Controller
•GBICs and FC cables
3.Boot Options ROMPaq toupgrade FWon all RA4000 Controllers.

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4.Boot to DOS on the server
5.Copythe latest CPQFC.HAM driver (version 2.00 or greater) to C:\NWSERVER from
NSSD 5.10 or later.
6.Ensure that the CPQFC.HAM driver will be loaded for new Fibre Channel Host Adapter(s)
byediting the server’s STARTUP.NCFfile and either:
7.Add new “load” command(s) for CPQFC.HAM using the “slot = n” command line parameter
where “n” is the slot number of the new Fibre Channel Host Adapter(s).
OR
8.Use a single instance of “load cpqfc.ham” without a “slot =” command line parameter so that
the driver will load forall supported Fibre Channel Host Adapters installed in the server.
9.Restart the server. CPQFC.HAM will automaticallydetect and utilize new redundant paths.
RA4000 Configuration
Compaq has developed the followingutilities to simplifyconfiguration of an RA4000 storage
system.
•ArrayConfiguration Utility
•Fibre Fault Isolation Utility
•Compaq RedundancyManager
ArrayConfiguration Utility
The Compaq ArrayConfiguration Utility(ACU) is provided on the Compaq SmartStart and
Support Software CD and uses a graphical interface to streamline configuration ofRA4000s.The
ACU contains intuitive online configuration wizards that provide guided paths for complete array
configuration. The ACU also contains customized paths for administrators needing complete
controloverconfiguration options.
Version 1.20 and later of the ACU provides an interface tointelligent features of the RA4000
Controllerthat make it easyfor administrators toconfigure,modify, expand,manage,and
monitor their storage.
Using the ACU, an administrator can quicklyassign physical drives to an array. Up to 4 drives
can be assigned as online spares, and from 1 to 32 logical drives can be created per controller.
The ACU steps through each logical drive configuration until all space is allocated. Fault
tolerance levels can be selected on a logical drive basis.
Custom configuration paths allow the administrator to examine the details of both logical and
physical views and to make specific configuration changes if necessary.Graphical views of the
arrayand the logical drives make it easyto visualize how the storage is configured.
Capacityexpansion is done at the arraylevel, not at the logical drive level. Inmost cases, all disk
drives attached to a controller should be grouped together into a single array. This allows for the
most efficient use ofRAIDredundancy.

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Other features of the ACU include three light-emittingdiodes (LEDs). If several RA4000s are
installed in one location (such as a data center), it maybe difficult for an administrator to
remember the physical location of the drive being configured at anygiven time. To eliminate that
problem, the ACU flashes all three LED indicators on the physical drive trayfor the controller
beingconfigured.
The user interface displays information such as the ID assigned toeach RA4000 on the Fibre
Channel Arbitrated Loop (FC-AL).The administrator maychange these ID assignments in the
Controller Settings window.
The Compaq ACU was designed to configure a maximum of eight controllers. Windows NT 4.0
supports a maximumofeight logical drives in an RA4000.Inmaximumconfiguration
environments, the ACU mayoperate a bit slower than expected. The ACU displaysan hourglass
cursor to indicate that it is processing.
Fibre Fault IsolationUtility
Since the RA4000 is the first Compaq product touse an FC-ALtopologyand the loop includes
manycomponents, Compaq developed twonew support tools found on the SmartStart and
Support Software CD:
•The Fibre Channel TroubleshootingGuide
•The Fibre Fault Isolation Utility
The troubleshootingguide describes components ofthe RA4000 and the FibreFault Isolation
Utility.It contains flowcharts and other information for troubleshooting.
The purpose of the Fibre Fault Isolation Utilityis toverifythe installation and operation of a new
or existingRA4000. When used with the troubleshootingflowcharts, this utilityprovides fault
detection and help in isolating problems on the FC-AL.
Before configuringthe system, Compaq recommends runningthe FibreFault Isolation Utilityas
soon as all hardware components of the RA4000 have been connected. This utilityis run offline1
on the server. It displays a graphical window showing each Fibre Channel Host Adapter and each
RA4000 that is properlyconnected on the loop.If one of these components is not displayed on
the screen, consult the troubleshooting guide to determine why.
The Fibre Fault Isolation Utilitydisplays all devices that are properlylogged on to the FC-AL and
tests for link errors within the loop. Alink is the portion of the loop between the Fibre Host
Adapter and a storage hub or between a storage hub and an RA4000.
1Inthis case, offline means equipment thatis turnedoff,not operating, or is not physicallyconnectedtothe system.

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Compaq RedundancyManager (NT)
The Compaq RedundancyManager software is a redundancymanagement solution,which
provides a rangeoffunctionalityforservers usingFibre Channel storage.The software allows
configurations with redundancytobe built. The RedundancyManagerprovides the abilityto
configure the environment with redundant Fibre Channel Host Adapters.
Active/Active Host Adapters (NT)
In RA4000 Storage Systems, data is transferred from the server to the arraysand recalled via data
paths through each Fibre Channel Host Adapter. Since the system contains multiple data paths,
different configurations are possible.The RedundancyManagerautomaticallyconfigures
multiple data paths with the first available path beingset as Activeand the next path as Standby.
However,the RedundancyManager can be manuallyconfigured tohaveActive/Active paths to
allow load balancing of the system and to utilize multiple paths at the same time. After the
environment is configured,the RedundancyManagerprovides redundancyand path management
in yourconfiguration.

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Load Balancing (NT)
Online load balancingallows forthe configuration of the data path tothe RA4000.When more
than one RA4000 and Fibre Channel Host Adapterare on the sameFibre Channel loop,the
systemcan be configured to use a different Fibre Channel Host Adaptertodistribute all ofthe
traffic toeach RA4000 and all of the logical drives on it. Usingdifferent paths toeach array
increases performance bydecreasing the workload of the Fibre Channel Host Adapter.
Figure 5.Load Balancing
Table1. Load Balancing Example
Item Description
1Server
2FibreChannel Host
Adapters
3FibreChannelHubs
4RA4000Controllers
5RA4000s