Policy=Bestfit Policy=Bestperformance | Compaq HSZ80 specification

5–71

Switches

COPY=FAST

COPY=NORMAL (Default)

Sets the speed at which the controller copies data to a new member from normal mirrorset members when data is being mirrored to the storageset’s disk drives.

Specify COPY=FAST to allow the creation of mirrored data to take precedence over other controller operations. When you specify COPY=FAST, the controller uses more resources to create the mirrored data, and copying takes less time. However, overall controller performance is reduced.

Specify COPY=NORMAL when operations performed by the controller should take priority over the copy operation. If you specify COPY=NORMAL creating the mirrored data has a minimal impact on performance.

POLICY=BEST_FIT

POLICY=BEST_PERFORMANCE

NOPOLICY (Default)

Sets the selection criteria the controller uses to choose a replacement disk from the spareset when a mirrorset member fails. If DT_SUPPORT is enabled, no policy can be selected.

Specify POLICY=BEST_FIT to choose a replacement disk drive from the spareset that equals or exceeds the base member size (smallest disk drive at the time the mirrorset was initialized). If there is more than one disk drive in the spareset that meets the criteria, the controller selects a disk drive with the best performance. This switch is not valid if DT_SUPPORT is enabled.

Compaq HSZ80 Array Controller ACS Version 8.3 Configuration and CLI Reference Guide

Image 257

Compaq HSZ80 manual Policy=Bestfit Policy=Bestperformance, Nopolicy Default

Contents

HSZ80 Array Controller ACS Version Page Japan USA Page Chapter Creating Storagesets Vii CLI Commands Viii Appendix a Page Figures Xii Xiii Tables Xiv Compaq Website Telephone Numbers Getting Help Electrostatic Discharge Precautions PrecautionsComponent Precaution Xvi About This Guide Xvii Vhdci Cable PrecautionsMaintenance Port Precautions Xviii About This Guide ConventionsTypographical Conventions Xix Special Notices Xx About This Guide Required Tools Xxi Related Publications Xxii About This Guide Revision History General Description 2General Description Typical Installation Basic Building Block 4General Description Basic Building Blocks List Summary of Controller Features Summary of HSZ80 Features 6General Description Bridging the Gap Between the Host and Its Storage Subsystem HSZ80 Array Controller 8General Description HSZ80 Array Controller HSZ80 Array Controller 10General Description Description of Parts Description of Parts 12General Description Parts of the Optional Maintenance Port Cable EMU PVA Operator Control Panel 14General Description Maintenance Port Virtual Terminal Display Fault Management UtilityUtilities and Exercisers Disk Inline Exerciser Configuration UtilityCode Load and Code Patch Utility Clone Utility Device Statistics Utility Field Replacement UtilityChange Volume Serial Number Utility 18General Description Cache Module Memory ConfigurationsCache Module Location of Cache Module Parts Read Caching Caching TechniquesRead-Ahead Caching 20General Description Write-Back Caching Write-Through Caching Nonvolatile Memory Fault-Tolerance for Write-Back CachingCache Policies Resulting from Cache Module Failures 22General Description Cache Policies and Cache Module Status Failover to controller B 24General Description Resulting Cache Policies and ECB Status 26General Description Through caching to its units Less than 28General Description 10 ECB Capacity Based on Memory Size External Cache Battery 30General Description 11 Location of Parts Battery Hysteresis Charging DiagnosticsPage Configuring an HSZ80 Array Controller Introduction Configuration Rules2Configuring an HSZ80 Array Controller Few Tips Configuring an HSZ80 Array Controller 4Configuring an HSZ80 Array Controller Location of Parts for a Single Controller Configuration Configuring a Single Controller 6Configuring an HSZ80 Array Controller SET Thiscontroller HOSTFUNCTION= ID, Mode 8Configuring an HSZ80 Array Controller Connecting a Single Controller to the Host 10Configuring an HSZ80 Array Controller Location of Parts for Transparent Failover SET Failover Copy = Thiscontroller 12Configuring an HSZ80 Array Controller Restart Othercontroller Restart Thiscontroller 14Configuring an HSZ80 Array Controller Connecting in Transparent Failover Mode to the Host 16Configuring an HSZ80 Array Controller Location of Parts for Multiple-Bus Failover SET Multibusfailover Copy = Thiscontroller 18Configuring an HSZ80 Array Controller Restart Othercontroller Restart Thiscontroller 20Configuring an HSZ80 Array Controller Connecting in Multiple-Bus Failover Mode to the Host Change the CLI prompt 22Configuring an HSZ80 Array ControllerOptional Steps Set the maximum data-transfer rate UPS Support 24Configuring an HSZ80 Array Controller Setting the PVA Module ID Switch Establishing a Local Connection to Controller 26Configuring an HSZ80 Array Controller PC/Terminal to Maintenance Port Connection This Controller and Other Controller 28Configuring an HSZ80 Array Controller Using Transparent Failover Mode Selecting a Failover Mode 30Configuring an HSZ80 Array Controller Using Multiple-Bus Failover Mode Enabling Mirrored Write-Back Cache Selecting a Cache Mode 32Configuring an HSZ80 Array Controller Fault-Tolerance Host Scsi Bus Setting Scsi Target ID Numbers Device Scsi Bus 34Configuring an HSZ80 Array Controller Using Preferred ID Numbers Page Creating Storagesets 2Creating Storagesets Disk drives 4Creating Storagesets Planning and Configuring Storagesets Creating a Storageset and Device Profile Type of Storageset Creating Storagesets Determining Storage Requirements A Comparison of Different Kinds of Storagesets Choosing a Storageset Type8Creating Storagesets For Disk Array Technology Using Stripesets to Increase I/O Performance 10Creating Storagesets Considerations for Planning a Stripeset Distribute Members across Ports 12Creating Storagesets Using Mirrorsets to Ensure Availability Mirrorsets Maintain Two Copies of the Same Data Considerations for Planning a Mirrorset First Mirrorset Members on Different Buses 14Creating Storagesets Using RAIDsets to Increase Performance Availability 16Creating Storagesets Considerations for Planning a RAIDsetPage Striping and Mirroring in the Same Storageset 18Creating Storagesets Considerations for Planning a Striped Mirrorset 20Creating Storagesets Cloning Data for Backup Clone Steps for Duplicating Unit Members 22Creating Storagesets Example Use available device DISK20400size=832317 for member DISK20000size=832317 y,n y ? y 24Creating Storagesets Saving Subsystem Configuration Information to a Single Disk Backing Up Your Subsystem Configuration 26Creating Storagesets Saving Subsystem Configuration Information to a Storageset Controller Displaying the Status of the Save Configuration Feature Cache 28Creating Storagesets Notransportable 30Creating Storagesets Node IDsRestoring Node IDs Page 32Creating Storagesets Assigning Unit Numbers for Host Access to Storagesets LUN Unit Numbering Examples 34Creating Storagesets Creating a Storageset Map 10. Storageset Map Locate devicename Device PTL Addressing Convention within Controller36Creating Storagesets 11. PTL Naming Convention Device port numbers Target Numbers 38Creating Storagesets 13. Locating Devices using PTLs 40Creating Storagesets Planning PartitionsDefining a Partition Guidelines for Partitioning Storagesets Disk Drives Enabling Switches Choosing Switches for Storagesets DevicesChanging Switches 42Creating Storagesets Reconstruction Policy RAIDset SwitchesReplacement Policy 44Creating Storagesets Membership Mirrorset Switches 46Creating Storagesets Copy SpeedRead Source Disaster Tolerance Support 48Creating Storagesets Device SwitchesTransportability Device Transfer Rate Dtsupport Local/Remote50Creating Storagesets Chunk Size Initialize Switches 52Creating Storagesets Increasing the Request Rate 16. Chunk Size Smaller than the Request Size Increasing the Data Transfer Rate Maximum Chunk Size for RAIDsets Increasing Sequential Write PerformanceMaximum Chunk Sizes for a RAIDset 54Creating Storagesets Considerations for Saving the Configuration Save Configuration 56Creating Storagesets Destroy/Nodestroy 58Creating Storagesets Unit SwitchesUnit Switches for Storagesets Configuring Storagesets ADD Disk DISKnnnn ptl-location switchvalue 2Configuring StoragesetsAdding Disk Drives Adding One Disk Drive at a Time Configuring a Stripeset 4Configuring Storagesets Configuring a MirrorsetADD Mirrorset mirrorset-name DISKnnnn DISKnnnn switch Initialize mirrorset-name switch Show mirrorset-name ADD Unit unit-number mirrorset-name switch 6Configuring Storagesets Configuring a RAIDsetADD Raidset RAIDset-name DISKnnnn DISKnnnn DISKnnnn switch Initialize RAIDset-name switch ADD Stripeset stripeset-name mirrorset1 mirrorset2 Configuring a Striped MirrorsetShow RAIDset-name 8Configuring Storagesets ADD Unit unit-number DISKnnnn switchvalue Configuring a Single-Disk Unit Partitioning a Storageset or Disk Drive 10Configuring Storagesets Show storageset-name Initialize storageset-name switch 12Configuring Storagesets Adding a Disk Drive to the Spareset 14Configuring Storagesets Removing a Disk Drive from the Spareset Enabling Autospare Deleting a Storageset 16Configuring StoragesetsDelete unit-number Delete storageset-name Displaying the Current Switches Changing Switches for a Storageset or DeviceChanging RAIDset and Mirrorset Switches Changing Device Switches 18Configuring Storagesets Changing Initialize SwitchesChanging Unit Switches Enabling and Disabling the CCL Configuring with the Command Console LUN SCSI-3 Mode SCSI-2 Mode20Configuring Storagesets Finding the CCL Location Adding Storage Units with the CCL Troubleshooting with the CCL 22Configuring Storagesets Host Modes Configuring Units with Multiple Hosts IBM AIX 24Configuring Storagesets Setting Host Modes Designating the Port Transparent Failover Mode26Configuring Storagesets Accessing Units on a Given Port Designating the Host Scsi ID Number 28Configuring Storagesets Scsi ID Designating the Port and Designating the Host Scsi ID Number 30Configuring Storagesets SET this PORT1ID = SET this PORT2ID = 32Configuring Storagesets Multiple-Bus Failover Mode Assigning Units through Multiple Host Adapters 34Configuring Storagesets Moving a Storageset from one Subsystem to Another Moving Storagesets Locate disk-name 36Configuring StoragesetsDelete disk-name ADD Disk disk-name PTL-location ADD Unit unit-number storageset-name ADD storageset-name disk-name disk-name Move disk drives to their new location 38Configuring Storagesets CLI Commands Command Overview Using the CLI2CLI Commands CLI Overview SET Thiscontroller ? Entering CLI CommandsGetting Help Unit Naming Recall and Edit Command Keys4CLI Commands Unit Number 6CLI Commands Command SyntaxCommand parameter Switches Changing the CLI Prompt Parameters ADD DiskSyntax 8CLI Commands SwitchesTransportable Remote TRANSFERRATEREQUESTED=ASYNCHRONOUS TRANSFERRATEREQUESTED=20MHZ DefaultTRANSFERRATEREQUESTED=10MHZ TRANSFERRATEREQUESTED=5MHZ ADD Disk DISK40200 4 2 0 Transportable See also 10CLI CommandsInitialize DISK20000 2 0 ADD Unit D199 DISK20000 ADD Disk DISK200 2 0 0 Remote COPY=FAST ADD Mirrorset POLICY=BESTPERFORMANCE Default 12CLI CommandsDtsupport Nodtsupport POLICY=BESTFIT READSOURCE=ROUNDROBIN READSOURCE=disk-name READSOURCE=LEASTBUSY Default Initialize MIRR1 ADD Unit D104 MIRR1 14CLI CommandsADD Mirrorset MIRR1 DISK10000 DISK20100 DISK30200 Show Mirrorsets Show Storagesets Unmirror ADD Disk ADD UnitInitialize Mirror Reduce ADD Passthrough 16CLI CommandsParameter ADD Passthrough passthrough-name scsi-port-target-lun ADD Passthrough TAPE20300 2 3 ADD Unit P100 TAPE20300 Show passthrough-name 18CLI CommandsShow Devices Show Passthrough RAIDset-name ADD Raidset RECONSTRUCT=FAST 20CLI CommandsRECONSTRUCT=NORMAL Default Reduced Noreduced DefaultADD Raidset RAID9 DISK10000 DISK20100 DISK30200 Initialize RAID8 ADD Unit D70 RAID8 22CLI CommandsADD Raidset RAID6 DISK10300 DISK20400 DISK30200 Reduced SET Raidset Show Raidset ADD Spareset DISK20200 ADD Spareset DISK30300 ADD SparesetDelete Spareset Show Spareset Show Storagesets Disk-name ADD Stripeset 24CLI CommandsStripeset-name Container-name1 container-name2 container-nameN Initialize STRIPE1 ADD Unit D103 STRIPE1 ADD Stripeset STRIPE1 DISK10000 DISK20100 DISK30200 Initialize Show Storageset Show Stripeset 26CLI CommandsADD Unit ADD Mirrorset Unit-number ADD UnitADD Unit unit-number container-name 28CLI Commands ADD Unit Switches for StoragesetsPage MAXIMUMCACHEDTRANSFER=32 Default MAXIMUMCACHEDTRANSFER=n 30CLI CommandsNopreferredpath Default PARTITION=partitionnumber Readaheadcache Default Readcache DefaultNoreadcache Noreadaheadcache Norun 32CLI CommandsNowriteprotect Nowritebackcache ADD Unit D102 DISK10000 PREFERREDPATH=THISCONTROLLER Createpartition 34CLI CommandsDelete unit-number SET unit-number Show Units Clearerrors CLI Clearerrors CLIClearerrors CLI Clearerrors Clearerrors Clearerrors Clearerrors Controller Clearerrors controller Invalidcache36CLI Commands Examples 38CLI Commands Clearerrors device-nameUNKNOWNClearerrors DISK30000 Unknown Device-name See also Clearerrors D103 Lostdata Clearerrors unit-numberLOSTDATA40CLI Commands See also 42CLI Commands Clearerrors unit-numberClearerrors D103 Unwriteabledata Unwriteabledata See also 44CLI Commands Configuration ResetConfiguration Reset Configuration Restore Configuration Save Initialize Configuration Restore Configuration Restore Configuration Reset Configuration Save Initialize 46CLI Commands Configuration Reset Configuration Restore Initialize Configuration Save Createpartition 48CLI CommandsCreatepartition container-name SIZE=percent SIZE=percent CAPACITY= CYLINDERS= HEADS= SECTORSPERTRACK= Destroy Partition Show 50CLI Commands Delete STRIPE1 Delete DISK10000 Delete RAID9 52CLI CommandsDelete Failedset Delete Spareset Unmirror SET Failedset Show Failedset Delete FailedsetDelete Failedset DISK20200 54CLI Commands Delete SparesetDelete Spareset DISK20300 ADD Spareset Show Spareset Delete D103 Delete unit-number Delete Failedsets Delete Sparesets Destroypartition 56CLI CommandsADD Unit Clearerrors Lostdata Partition-number DestroypartitionDestroypartition container-name PARTITION=partition-number Delete D102 Destroypartition RAID9 PARTITION=2 58CLI Commands RUN DirectoryDirectory Help 60CLI CommandsHelp Help Your options are SET ? Initialize container-name 62CLI CommandsInitialize CHUNKSIZE=DEFAULT Default CHUNKSIZE=n Destroy Default 64CLI CommandsSaveconfiguration Nosaveconfiguration Default Show Devices Full Initialize DISK10000 Saveconfiguration Reduce DISK40400 Initialize DISK40400 Nodestroy 66CLI Commands Locate CancelLocate parameter ALL Disks 68CLI CommandsPTL SCSI-location Units Locate Disks Locate DISK10000 Locate CancelLocate D102 Mirror disk-name mirrorset-name 70CLI CommandsMirror POLICY=BESTFIT POLICY=BESTPERFORMANCE Nopolicy Default 72CLI Commands ADD Mirrorset Reduce Show Mirrorsets Unmirror 74CLI Commands PoweroffBattery on Overridebadflush SECONDS=nn Poweroff Switch Settings Poweroff SECONDS=10 76CLI Commands Reduce Disk-name1 disk-name2 disk-name3 78CLI CommandsReduce disk-name1 disk-name2 disk-name3 Show Mirrorsets Show STRIPE1 SET mirrorset-name 80CLI CommandsADD Mirrorset RUN Clone Show Mirrorset Rename old-container-name new-container-name RenameOld-container-name New-container-name Rename DISK10000 Mydisk Show Disks 82CLI Commands Restart controller IgnoreerrorsNoignoreerrors Default Immediateshutdown 84CLI CommandsRestart Thiscontroller Restart Othercontroller Retryerrors D103 Unwriteabledata Retryerrors unit-number RUN 86CLI CommandsRUN program-name Program-namePage RUN Dilx 88CLI Commands Selftest controller Selftest controller Selftest Othercontroller Ignoreerrors 90CLI CommandsSelftest Thiscontroller Restart controller Shutdown controller Thiscontroller SET controller SwitchesSET controller 92CLI Commands Nocacheups Default CACHEFLUSHTIMER=n CACHEFLUSHTIMER=10 DefaultAllocationclass Cacheups Commandconsolelun 94CLI CommandsNocommandconsolelun Default HOSTFUNCTION=mode HOSTFUNCTION=ID,mode NODEID=nnnn-nnnn-nnnn-nnnn checksum NOPORT1ID 96CLI CommandsNOPORT2ID MirroredcachePage NOPORT2PREFERREDID 98CLI CommandsNOPORT1PREFERREDID TERMINALSPEED=baudrate TERMINALSPEED=9600 Default SCSIVERSION=SCSI-2 DefaultSCSIVERSION=SCSI-3 TERMINALPARITY=ODD TERMINALPARITY=EVEN Maximum SCSI-Bus Lengths for Given Data Transfer Rate 100CLI Commands SET Othercontroller PROMPT=CONTROLLER B 101SET Thiscontroller PORT1ID=2,5 Show Thiscontroller Show Othercontroller SET device-name 102CLI Commands 103 SET DISK20000 TRANSFERRATEREQUESTED=5MHZ 104CLI CommandsSET DISK10300 Transportable SET DISK10300 Remote SET EMU SET EMU105 106CLI Commands EMU Set Point TemperaturesFANSPEED=AUTOMATIC Default FANSPEED=HIGH SET EMU FANSPEED=HIGH 107SET EMU SENSOR2SETPOINT=34 SET Failedset 108CLI CommandsSET Failedset Autospare Noautospare SET DISK10000 Transportable 109Init DISK10000 SET Failedset Autospare Thiscontroller Othercontroller 110CLI CommandsSET Failover SET Multibusfailover SET Nofailover SET Nomultibusfailover 111SET Failover COPY=THISCONTROLLER SET mirrorset-name 112CLI Commands MEMBERSHIP=number-of-members 113 REPLACE=disk-name 114CLI CommandsREMOVE=disk-name 115 SET MIRR1 POLICY=BESTFIT 116CLI Commands SET MIRR1 REMOVE=DISK30000 117SET MIRR1 REPLACE=DISK30200 ADD Mirrorset Reduce Show Mirrorset Unmirror SET Multibusfailover 118CLI Commands SET Failover SET Nofailover SET Nomultibusfailover 119 Nodestroyunflushabledata Default 120CLI CommandsSET Nofailover Destroyunflushabledata SET Failover SET Multibusfailover SET Nomultibusfailover 121SET Nofailover SET Nomultibusfailover 122CLI Commands SET Failover SET Multibusfailover SET Nofailover 123SET Nomultibusfailover Destroyunflushabledata SET RAIDset-name 124CLI Commands 125 SET RAID9 REMOVE=DISK10000 126CLI CommandsSET RAID9 POLICY=BESTFIT ADD Raidset Show Raidsets 127SET RAID9 REPLACE=DISK20100 SET unit-number 128CLI Commands 129 130CLI Commands 131 MAXIMUMCACHEDTRANSFER=n MAXIMUMCACHEDTRANSFER=32 Default ERRORMODE=NORMAL ERRORMODE=FAILSAFE 132CLI Commands 133 134CLI Commands SET D102 Writeprotect Noreadcache 135 Show 136CLI CommandsShow controller Show device-name Show device-type Show EMU Device-type 137EMU Storageset-name Full 138CLI Commands 139 Show Mirrorset Full 140CLI CommandsShow MIRR1 Show Thiscontroller Full 141 Show EMU 142CLI Commands 143 Shutdown controller Restart controller Selftest controller 144CLI CommandsShutdown Thiscontroller Unmirror DISK10300 Unmirror145 ADD Mirrorset Reduce RUN Clone 146CLI Commands System Profiles 2System Profiles Device Profile Reduced Membership Storageset Profile 4System Profiles Enclosure Template Controller Specifications 2Controller Specifications Physical and Electrical Specifications for Controller Optimum Operating Environmental Specifications Environmental Specifications 4Controller Specifications Table B-3 Maximum Operating Environmental SpecificationsTable B-4 Maximum Nonoperating Environmental Specifications Glossary Bit GL-2Glossary CSR Data striping GL-4Glossary See ECB Dual-simplex FD Scsi GL-6Glossary IBR Operation GL-8Glossary Mist Normal member GL-10Glossary PCM PTL GL-12Glossary RAIDset RFI GL-14Glossary SCSI-P cable Storage subsystem GL-16Glossary Synchronous GL-17 Vhdci GL-18Glossary GL-19 Page ADD Raidset RAIDset-name container- nameN ADD Passthrough passthrough-name scsi-port-target-lun,5-16ADD Stripeset stripeset-name container- nameN ADD Unit unit-number container-name,5-27Adding AUTOSPARE, 4-15SET Failedset Batteryoff Poweroff Batteryon Poweroff2Index Capacity CREATEPARTITION, 5-49INITIALIZE CacheupsChunksize Initialize Lostdata SET MULTIBUSFAILOVER, 5-118SET Nofailover 4IndexPage Cylinders CREATEPARTITION, 5-49INITIALIZE 6IndexCopy Destroyunflushabledata SET Nofailover SET Nomultibusfailover 8Index Disableaccesspath ADD UnitDilx Disks ECB Enableaccesspath ADD UnitErrormode Index ADD Disk NosaveconfigurationSaveconfiguration Maximumcachedtransfer ADD Unit PTL SCSI-location,5-68unit-number,5-68UNITSMembership SET mirrorset-name,5-113Membership Nodeid Nooverridebadflush Poweroff Noautospare SET FailedsetINVALIDCACHE, 5-36NODTSUPPORT Nopolicy ADD RAIDSET, 5-20NOPORT1ID NOPORT2TRANSFERRATEREQUEST ED Overridebadflush PoweroffNopreferredpath Noreadcache PORT2ID Show device-type,5-137PathPORT1ID SET controller, 5-98Protocol PreferredpathPrompt SET RAIDset-name,5-125 SET mirrorset-name,5-114Rename old-container-name new-container SET mirrorset-name,5-116 RUN program name WRITEPROTECT, 5-133WRITEBACKCACHE PORT1PREFERREDID PORT1TRANSFERRATEREQUESTE DPORT2PREFERREDID PORT2TRANSFERRATEREQUESTE D Show storageset-name,5-137SHOW storageset-type,5-137 Passthrough Size Createpartition TRANSFERRATEREQUESTED, 3-49TRANSPORTABLE TRANSFERRATEREQUESTED, 3-49ADD Disk TimeSET controller, 5-99Tip, defined, xix Tools, xx Topology Vtdpy Writeprotect