Clearerrors device-nameUNKNOWN, 38CLI Commands | Compaq HSZ80

5–38CLI Commands

CLEAR_ERRORS device-nameUNKNOWN

If a device failure causes the controller to label the device as unknown, the controller does not check the device again to see if it has been repaired or if the error condition has been corrected. You must enter this command so the controller can recognize the device after the cause of the error has been corrected.

Use this command to force the controller to recognize a failed device, regardless of the controller’s prior evaluation of the device’s condition.

Syntax

CLEAR_ERRORS device-nameUNKNOWN

Spell out UNKNOWN when using this command.

Parameters

device-name

Identifies the device with the unknown error.

Example

This example shows how to force the controller to recognize a previously unknown device named DISK30000:

CLEAR_ERRORS DISK30000 UNKNOWN

Image 224

Compaq HSZ80 manual Clearerrors device-nameUNKNOWN, 38CLI Commands, Device-name, Clearerrors DISK30000 Unknown

Contents

HSZ80 Array Controller ACS Version Page Japan USA Page Chapter Creating Storagesets CLI Commands Vii Viii Appendix a Page Figures Xii Tables Xiii Xiv Getting Help Compaq Website Telephone Numbers Precautions Electrostatic Discharge PrecautionsComponent Precaution Xvi About This Guide Xvii Vhdci Cable PrecautionsMaintenance Port Precautions Xviii About This Guide ConventionsTypographical Conventions Special Notices Xix Required Tools Xx About This Guide Related Publications Xxi Revision History Xxii About This Guide General Description Typical Installation 2General Description Basic Building Block Basic Building Blocks List 4General Description Summary of HSZ80 Features Summary of Controller Features 6General Description HSZ80 Array Controller Bridging the Gap Between the Host and Its Storage Subsystem 8General Description HSZ80 Array Controller HSZ80 Array Controller Description of Parts 10General Description Description of Parts Parts of the Optional Maintenance Port Cable 12General Description Operator Control Panel EMU PVA Maintenance Port 14General Description Virtual Terminal Display Fault Management UtilityUtilities and Exercisers Configuration Utility Disk Inline ExerciserCode 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 Caching Techniques Read CachingRead-Ahead Caching 20General Description Write-Through Caching Write-Back Caching Fault-Tolerance for Write-Back Caching Nonvolatile MemoryCache Policies Resulting from Cache Module Failures 22General Description Cache Policies and Cache Module Status 24General Description Failover to controller B Resulting Cache Policies and ECB Status 26General Description Through caching to its units Less than 28General Description External Cache Battery 10 ECB Capacity Based on Memory Size 11 Location of Parts 30General Description Charging Diagnostics Battery HysteresisPage Configuring an HSZ80 Array Controller Introduction Configuration Rules2Configuring an HSZ80 Array Controller Configuring an HSZ80 Array Controller Few Tips 4Configuring an HSZ80 Array Controller Configuring a Single Controller Location of Parts for a Single Controller Configuration 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 12Configuring an HSZ80 Array Controller SET Failover Copy = Thiscontroller 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 18Configuring an HSZ80 Array Controller SET Multibusfailover Copy = Thiscontroller 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 24Configuring an HSZ80 Array Controller UPS Support Setting the PVA Module ID Switch 26Configuring an HSZ80 Array Controller Establishing a Local Connection to Controller PC/Terminal to Maintenance Port Connection 28Configuring an HSZ80 Array Controller This Controller and Other Controller Selecting a Failover Mode Using Transparent Failover Mode Using Multiple-Bus Failover Mode 30Configuring an HSZ80 Array Controller Selecting a Cache Mode Enabling Mirrored Write-Back Cache Fault-Tolerance 32Configuring an HSZ80 Array Controller Setting Scsi Target ID Numbers Host Scsi Bus 34Configuring an HSZ80 Array Controller Device Scsi Bus Using Preferred ID Numbers Page Creating Storagesets 2Creating Storagesets Disk drives Planning and Configuring Storagesets 4Creating Storagesets Creating a Storageset and Device Profile Creating Storagesets Type of Storageset Determining Storage Requirements Choosing a Storageset Type A Comparison of Different Kinds of Storagesets8Creating Storagesets For Disk Array Technology Using Stripesets to Increase I/O Performance Considerations for Planning a Stripeset 10Creating Storagesets Distribute Members across Ports Using Mirrorsets to Ensure Availability 12Creating Storagesets Considerations for Planning a Mirrorset Mirrorsets Maintain Two Copies of the Same Data 14Creating Storagesets First Mirrorset Members on Different Buses Using RAIDsets to Increase Performance Availability Considerations for Planning a RAIDset 16Creating StoragesetsPage 18Creating Storagesets Striping and Mirroring in the Same Storageset Considerations for Planning a Striped Mirrorset Cloning Data for Backup 20Creating Storagesets Clone Steps for Duplicating Unit Members Example 22Creating Storagesets Use available device DISK20400size=832317 for member 24Creating Storagesets DISK20000size=832317 y,n y ? y Backing Up Your Subsystem Configuration Saving Subsystem Configuration Information to a Single Disk Saving Subsystem Configuration Information to a Storageset 26Creating Storagesets Displaying the Status of the Save Configuration Feature Controller 28Creating Storagesets Cache Notransportable 30Creating Storagesets Node IDsRestoring Node IDs Page Assigning Unit Numbers for Host Access to Storagesets 32Creating Storagesets Unit Numbering Examples LUN Creating a Storageset Map 34Creating Storagesets 10. Storageset Map Locate devicename Device PTL Addressing Convention within Controller36Creating Storagesets 11. PTL Naming Convention 38Creating Storagesets Device port numbers Target Numbers 13. Locating Devices using PTLs 40Creating Storagesets Planning PartitionsDefining a Partition Guidelines for Partitioning Storagesets Disk Drives Choosing Switches for Storagesets Devices Enabling SwitchesChanging Switches 42Creating Storagesets Reconstruction Policy RAIDset SwitchesReplacement Policy Membership 44Creating Storagesets Mirrorset Switches 46Creating Storagesets Copy SpeedRead Source Disaster Tolerance Support 48Creating Storagesets Device SwitchesTransportability Device Transfer Rate Dtsupport Local/Remote50Creating Storagesets Initialize Switches Chunk Size Increasing the Request Rate 52Creating Storagesets Increasing the Data Transfer Rate 16. Chunk Size Smaller than the Request Size Increasing Sequential Write Performance Maximum Chunk Size for RAIDsetsMaximum Chunk Sizes for a RAIDset 54Creating Storagesets Save Configuration Considerations for Saving the Configuration 56Creating Storagesets Destroy/Nodestroy 58Creating Storagesets Unit SwitchesUnit Switches for Storagesets Configuring Storagesets 2Configuring Storagesets ADD Disk DISKnnnn ptl-location switchvalueAdding Disk Drives Adding One Disk Drive at a Time Configuring a Stripeset Configuring a Mirrorset 4Configuring StoragesetsADD Mirrorset mirrorset-name DISKnnnn DISKnnnn switch Initialize mirrorset-name switch ADD Unit unit-number mirrorset-name switch Show mirrorset-name Configuring a RAIDset 6Configuring StoragesetsADD 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 Configuring a Single-Disk Unit ADD Unit unit-number DISKnnnn switchvalue 10Configuring Storagesets Partitioning a Storageset or Disk Drive Initialize storageset-name switch Show storageset-name 12Configuring Storagesets Adding a Disk Drive to the Spareset Removing a Disk Drive from the Spareset 14Configuring Storagesets Enabling Autospare 16Configuring Storagesets Deleting a StoragesetDelete unit-number Delete storageset-name Changing Switches for a Storageset or Device Displaying the Current SwitchesChanging RAIDset and Mirrorset Switches Changing Device Switches 18Configuring Storagesets Changing Initialize SwitchesChanging Unit Switches Configuring with the Command Console LUN Enabling and Disabling the CCL SCSI-2 Mode SCSI-3 Mode20Configuring Storagesets Finding the CCL Location Troubleshooting with the CCL Adding Storage Units with the CCL 22Configuring Storagesets Configuring Units with Multiple Hosts Host Modes 24Configuring Storagesets IBM AIX Setting Host Modes Designating the Port Transparent Failover Mode26Configuring Storagesets Accessing Units on a Given Port 28Configuring Storagesets Designating the Host Scsi ID Number Scsi ID 30Configuring Storagesets Designating the Port and Designating the Host Scsi ID Number SET this PORT1ID = SET this PORT2ID = Multiple-Bus Failover Mode 32Configuring Storagesets Assigning Units through Multiple Host Adapters 34Configuring Storagesets Moving Storagesets Moving a Storageset from one Subsystem to Another 36Configuring Storagesets Locate disk-nameDelete disk-name ADD Disk disk-name PTL-location ADD storageset-name disk-name disk-name ADD Unit unit-number storageset-name 38Configuring Storagesets Move disk drives to their new location CLI Commands Using the CLI Command Overview2CLI Commands CLI Overview SET Thiscontroller ? Entering CLI CommandsGetting Help Unit Naming Recall and Edit Command Keys4CLI Commands Unit Number Command Syntax 6CLI CommandsCommand parameter Switches Changing the CLI Prompt Parameters ADD DiskSyntax Switches 8CLI CommandsTransportable Remote TRANSFERRATEREQUESTED=20MHZ Default TRANSFERRATEREQUESTED=ASYNCHRONOUSTRANSFERRATEREQUESTED=10MHZ TRANSFERRATEREQUESTED=5MHZ ADD Disk DISK40200 4 2 0 Transportable 10CLI Commands See alsoInitialize DISK20000 2 0 ADD Unit D199 DISK20000 ADD Disk DISK200 2 0 0 Remote ADD Mirrorset COPY=FAST 12CLI Commands POLICY=BESTPERFORMANCE DefaultDtsupport Nodtsupport POLICY=BESTFIT READSOURCE=disk-name READSOURCE=LEASTBUSY Default READSOURCE=ROUNDROBIN Initialize MIRR1 ADD Unit D104 MIRR1 14CLI CommandsADD Mirrorset MIRR1 DISK10000 DISK20100 DISK30200 Show Mirrorsets Show Storagesets Unmirror ADD Disk ADD UnitInitialize Mirror Reduce 16CLI Commands ADD PassthroughParameter 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 ADD Raidset RAIDset-name RECONSTRUCT=FAST 20CLI CommandsRECONSTRUCT=NORMAL Default Noreduced Default ReducedADD Raidset RAID9 DISK10000 DISK20100 DISK30200 Initialize RAID8 22CLI Commands ADD Unit D70 RAID8ADD Raidset RAID6 DISK10300 DISK20400 DISK30200 Reduced SET Raidset Show Raidset ADD Spareset ADD Spareset DISK20200 ADD Spareset DISK30300Delete Spareset Show Spareset Show Storagesets Disk-name 24CLI Commands ADD StripesetStripeset-name Container-name1 container-name2 container-nameN ADD Stripeset STRIPE1 DISK10000 DISK20100 DISK30200 Initialize STRIPE1 ADD Unit D103 STRIPE1 Initialize Show Storageset Show Stripeset 26CLI CommandsADD Unit ADD Mirrorset Unit-number ADD UnitADD Unit unit-number container-name ADD Unit Switches for Storagesets 28CLI CommandsPage 30CLI Commands MAXIMUMCACHEDTRANSFER=32 Default MAXIMUMCACHEDTRANSFER=nNopreferredpath Default PARTITION=partitionnumber Readcache Default Readaheadcache DefaultNoreadcache Noreadaheadcache 32CLI Commands NorunNowriteprotect Nowritebackcache ADD Unit D102 DISK10000 PREFERREDPATH=THISCONTROLLER 34CLI Commands CreatepartitionDelete unit-number SET unit-number Show Units Clearerrors CLI Clearerrors CLIClearerrors CLI Clearerrors Clearerrors Clearerrors Clearerrors Controller Clearerrors controller Invalidcache36CLI Commands Examples Clearerrors device-nameUNKNOWN 38CLI CommandsClearerrors DISK30000 Unknown Device-name See also Clearerrors D103 Lostdata Clearerrors unit-numberLOSTDATA40CLI Commands See also Clearerrors unit-number 42CLI CommandsClearerrors D103 Unwriteabledata Unwriteabledata See also Configuration Reset 44CLI CommandsConfiguration Reset Configuration Restore Configuration Save Initialize Configuration Restore Configuration Restore 46CLI Commands Configuration Reset Configuration Save Initialize Configuration Save Configuration Reset Configuration Restore Initialize 48CLI Commands CreatepartitionCreatepartition container-name SIZE=percent SIZE=percent CAPACITY= CYLINDERS= HEADS= SECTORSPERTRACK= 50CLI Commands Destroy Partition Show Delete DISK10000 Delete STRIPE1 Delete RAID9 52CLI CommandsDelete Failedset Delete Spareset Unmirror SET Failedset Show Failedset Delete FailedsetDelete Failedset DISK20200 Delete Spareset 54CLI CommandsDelete Spareset DISK20300 ADD Spareset Show Spareset Delete unit-number Delete D103 Delete Failedsets Delete Sparesets Destroypartition 56CLI CommandsADD Unit Clearerrors Lostdata Partition-number DestroypartitionDestroypartition container-name PARTITION=partition-number 58CLI Commands Delete D102 Destroypartition RAID9 PARTITION=2 RUN DirectoryDirectory 60CLI Commands HelpHelp Help SET ? Your options are Initialize container-name 62CLI CommandsInitialize CHUNKSIZE=DEFAULT Default CHUNKSIZE=n 64CLI Commands Destroy DefaultSaveconfiguration Nosaveconfiguration Default Initialize DISK10000 Saveconfiguration Show Devices Full 66CLI Commands Reduce DISK40400 Initialize DISK40400 Nodestroy Cancel LocateLocate parameter ALL 68CLI Commands DisksPTL SCSI-location Units Locate Disks Locate DISK10000 Locate CancelLocate D102 Mirror disk-name mirrorset-name 70CLI CommandsMirror Nopolicy Default POLICY=BESTFIT POLICY=BESTPERFORMANCE 72CLI Commands ADD Mirrorset Reduce Show Mirrorsets Unmirror Poweroff 74CLI CommandsBattery on Overridebadflush Poweroff Switch Settings SECONDS=nn 76CLI Commands Poweroff SECONDS=10 Reduce Disk-name1 disk-name2 disk-name3 78CLI CommandsReduce disk-name1 disk-name2 disk-name3 Show STRIPE1 Show Mirrorsets SET mirrorset-name 80CLI CommandsADD Mirrorset RUN Clone Show Mirrorset Rename Rename old-container-name new-container-nameOld-container-name New-container-name 82CLI Commands Rename DISK10000 Mydisk Show Disks Restart controller IgnoreerrorsNoignoreerrors Default 84CLI Commands ImmediateshutdownRestart Thiscontroller Restart Othercontroller Retryerrors unit-number Retryerrors D103 Unwriteabledata 86CLI Commands RUNRUN program-name Program-namePage 88CLI Commands RUN Dilx Selftest controller Selftest controller 90CLI Commands Selftest Othercontroller IgnoreerrorsSelftest Thiscontroller Restart controller Shutdown controller Thiscontroller SET controller SwitchesSET controller 92CLI Commands CACHEFLUSHTIMER=n CACHEFLUSHTIMER=10 Default Nocacheups DefaultAllocationclass Cacheups 94CLI Commands CommandconsolelunNocommandconsolelun Default HOSTFUNCTION=mode HOSTFUNCTION=ID,mode NODEID=nnnn-nnnn-nnnn-nnnn checksum 96CLI Commands NOPORT1IDNOPORT2ID MirroredcachePage NOPORT2PREFERREDID 98CLI CommandsNOPORT1PREFERREDID SCSIVERSION=SCSI-2 Default TERMINALSPEED=baudrate TERMINALSPEED=9600 DefaultSCSIVERSION=SCSI-3 TERMINALPARITY=ODD TERMINALPARITY=EVEN 100CLI Commands Maximum SCSI-Bus Lengths for Given Data Transfer Rate 101 SET Othercontroller PROMPT=CONTROLLER BSET Thiscontroller PORT1ID=2,5 Show Thiscontroller Show Othercontroller 102CLI Commands SET device-name 103 104CLI Commands SET DISK20000 TRANSFERRATEREQUESTED=5MHZSET DISK10300 Transportable SET DISK10300 Remote SET EMU SET EMU105 EMU Set Point Temperatures 106CLI CommandsFANSPEED=AUTOMATIC Default FANSPEED=HIGH SET EMU FANSPEED=HIGH 107SET EMU SENSOR2SETPOINT=34 108CLI Commands SET FailedsetSET Failedset Autospare Noautospare 109 SET DISK10000 TransportableInit DISK10000 SET Failedset Autospare Thiscontroller Othercontroller 110CLI CommandsSET Failover SET Multibusfailover SET Nofailover SET Nomultibusfailover 111SET Failover COPY=THISCONTROLLER 112CLI Commands SET mirrorset-name 113 MEMBERSHIP=number-of-members REPLACE=disk-name 114CLI CommandsREMOVE=disk-name 115 116CLI Commands SET MIRR1 POLICY=BESTFIT 117 SET MIRR1 REMOVE=DISK30000SET MIRR1 REPLACE=DISK30200 ADD Mirrorset Reduce Show Mirrorset Unmirror 118CLI Commands SET Multibusfailover 119 SET Failover SET Nofailover SET Nomultibusfailover 120CLI Commands Nodestroyunflushabledata DefaultSET Nofailover Destroyunflushabledata SET Failover SET Multibusfailover SET Nomultibusfailover 121SET Nofailover 122CLI Commands SET Nomultibusfailover SET Failover SET Multibusfailover SET Nofailover 123SET Nomultibusfailover Destroyunflushabledata 124CLI Commands SET RAIDset-name 125 SET RAID9 REMOVE=DISK10000 126CLI CommandsSET RAID9 POLICY=BESTFIT ADD Raidset Show Raidsets 127SET RAID9 REPLACE=DISK20100 128CLI Commands SET unit-number 129 130CLI Commands MAXIMUMCACHEDTRANSFER=n MAXIMUMCACHEDTRANSFER=32 Default 131 132CLI Commands ERRORMODE=NORMAL ERRORMODE=FAILSAFE 133 134CLI Commands 135 SET D102 Writeprotect Noreadcache 136CLI Commands ShowShow controller Show device-name Show device-type Show EMU 137 Device-typeEMU Storageset-name 138CLI Commands Full 139 Show Mirrorset Full 140CLI CommandsShow MIRR1 141 Show Thiscontroller Full 142CLI Commands Show EMU Shutdown controller 143 Restart controller Selftest controller 144CLI CommandsShutdown Thiscontroller Unmirror DISK10300 Unmirror145 146CLI Commands ADD Mirrorset Reduce RUN Clone System Profiles Device Profile 2System Profiles Storageset Profile Reduced Membership Enclosure Template 4System Profiles Controller Specifications Physical and Electrical Specifications for Controller 2Controller Specifications Environmental Specifications Optimum Operating Environmental Specifications 4Controller Specifications Table B-3 Maximum Operating Environmental SpecificationsTable B-4 Maximum Nonoperating Environmental Specifications Glossary GL-2Glossary Bit CSR GL-4Glossary Data striping Dual-simplex See ECB GL-6Glossary FD Scsi IBR GL-8Glossary Operation Mist GL-10Glossary Normal member PCM GL-12Glossary PTL RAIDset GL-14Glossary RFI SCSI-P cable GL-16Glossary Storage subsystem GL-17 Synchronous GL-18Glossary Vhdci GL-19 Page ADD Passthrough passthrough-name scsi-port-target-lun,5-16 ADD Raidset RAIDset-name container- nameNADD Stripeset stripeset-name container- nameN ADD Unit unit-number container-name,5-27Adding AUTOSPARE, 4-15SET Failedset Batteryoff Poweroff Batteryon Poweroff2Index Cacheups Capacity CREATEPARTITION, 5-49INITIALIZEChunksize Initialize Lostdata 4Index SET MULTIBUSFAILOVER, 5-118SET NofailoverPage Cylinders CREATEPARTITION, 5-49INITIALIZE 6IndexCopy Destroyunflushabledata SET Nofailover SET Nomultibusfailover Disableaccesspath ADD Unit 8IndexDilx Disks ECB Enableaccesspath ADD UnitErrormode Index ADD Disk NosaveconfigurationSaveconfiguration PTL SCSI-location,5-68unit-number,5-68UNITS Maximumcachedtransfer ADD UnitMembership SET mirrorset-name,5-113Membership Nooverridebadflush Poweroff Noautospare SET Failedset NodeidINVALIDCACHE, 5-36NODTSUPPORT Nopolicy ADD RAIDSET, 5-20NOPORT1ID Overridebadflush Poweroff NOPORT2TRANSFERRATEREQUEST EDNopreferredpath Noreadcache PORT2ID Show device-type,5-137PathPORT1ID SET controller, 5-98Protocol PreferredpathPrompt SET mirrorset-name,5-114 SET RAIDset-name,5-125Rename old-container-name new-container SET mirrorset-name,5-116 RUN program name WRITEPROTECT, 5-133WRITEBACKCACHE PORT1PREFERREDID PORT1TRANSFERRATEREQUESTE DPORT2PREFERREDID PORT2TRANSFERRATEREQUESTE D Passthrough Show storageset-name,5-137SHOW storageset-type,5-137 Size Createpartition TRANSFERRATEREQUESTED, 3-49TRANSPORTABLE TRANSFERRATEREQUESTED, 3-49ADD Disk TimeSET controller, 5-99Tip, defined, xix Tools, xx Topology Vtdpy Writeprotect