Troubleshooting | HP Smart Storage Adstrator instruction

When the array contains only two physical drives, the fault-tolerance method is known as RAID 1.

When the array has more than two physical drives, drives are mirrored in pairs, and the fault-tolerance method is known as RAID 1+0 or RAID 10.

In each mirrored pair, the physical drive that is not busy answering other requests answers any read requests that are sent to the array. This behavior is called load balancing. If a physical drive fails, the remaining drive in the mirrored pair can still provide all the necessary data. Several drives in the array can fail without incurring data loss, as long as no two failed drives belong to the same mirrored pair.

This fault-tolerance method is useful when high performance and data protection are more important than the cost of physical drives.

Advantages:

•This method has the second highest read performance of any fault-tolerant configuration.

•No data is lost when a drive fails, as long as no failed drive is mirrored to another failed drive.

•Up to half of the physical drives in the array can fail.

Troubleshooting 121

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HP Smart Storage Adstrator manual Troubleshooting

Contents

HP Smart Storage Administrator User Guide Page Contents Optional components 130 About HP SSA Benefits of using HP SSA Support for configuration tasks Procedure HP Smart Array Array configuration guidelines Array configuration Minimum requirements Native support for 64-bit and 32-bit operating systems Launching HP SSA during Post Gen8 or later Accessing HP SSA in the offline environment Mounting the image through iLO Launching HP SSA from an ISO image all generationsBurning the image to a CD or DVD Set up PXELinux Installing the image on a PXE serverPrerequisites Specify the ISO image path Configure PXELinux Supported network file systems Accessing HP SSA in the online environment Hpssa- h Launching HP SSA on a local serverHttp//servername2301 Operations Icon and key stroke legend Using the HP SSA GUI Navigating the GUI Configure screen When a controller is selected, the following elements appear Diagnostics screen HP SSA help Configuration tasks Configuring a controller Performing a Configuration task HP SSD Smart Path Operations Rapid Parity Initialization SSD Over Provisioning Optimization Operations Changing the Spare Management mode Changing the Spare Activation Mode Operations Cache Manager Operations About HP SmartCache Enable HP SmartCache Operations Operations Installing a license key with HP SmartCache Enabling SmartCache Write-back Operations Splitting a mirrored array Working with mirrored arrays Recombining a split mirrored array Creating a split mirror backup Healing an array Replacing an array Setting Auto RAID Click Create Arrays with RAID Operations Managing FLS Setting Managing modes RAID mode or HBA mode Operations Power modes Viewing controller status Performing a Diagnostics task Diagnostic tasks Operations Opening the CLI in Console mode Using the HP SSA CLI\Program Files\hp\hpssacli\Bin\hpssacli.exe Root@localhost root# hpssacli Command variable Opening the CLI in Command modeCLI syntax Target variable Querying a device Available options are Current value DefaultHiding warning prompts = ctrl ch=Lab4 ld 1 modify raid=0 ss=? Target controller show config detail Show commandKeyword abbreviations Target show detailstatus = ctrl all show = ctrl ch=lab4 show config Help commandDisplaying the current versions of the application layers Version Setting the boot controller Typical proceduresSetting the boot volume Identifying devices Setting the targetSet target target = set target ctrl slot=3 = clear target Deleting target devices Generating a diagnostic reportTarget modify led=onoff Target delete forced Rescanning the system Erasing a physical driveEntering or deleting a license key Optimizing controller performance for video Target create type=ld parameter=value Creating a logical drive Sample scenario Available options are +0 default value Target modify newarray= Moving a logical driveTarget modify drives=# ##,# ##,# ##-# ## Viewing SSD physical drives Viewing enclosure informationViewing SSD information SmartCache in Hpssacli SSD Over Provisioning Optimization Rapid Parity Initialization methodsAssigning a chassis name to the controller = ctrl slot=1 array B create type=ldcache datald=2 Managing spare drives Setting the spare activation modeTarget modify spareactivationmode= failure predictive Controller slot=1 modify spareactivationmode=predictive Expanding an array Spare Management Mode in HpssacliShrinking an array Target remove drives=###-### Moving an arrayTarget modify drives=###-### spares=###-### = ctrl slot=1 create type=arrayr0 drives=allunassigned Extending a logical driveTarget modify size=#max? forced Target modify raid=01+0156adg? ss=8163264128256default? Setting the preferred path modeMigrating a logical drive Target modify preferredpathmode=automaticmanual? Disabling a redundant controller Changing the Rebuild Priority settingAssigning a redundant controller to a logical drive Setting the surface scan mode Changing the Expand Priority settingChanging the surface scan delay time Re-enabling a failed logical drive Enabling or disabling the drive cache Changing the controller cache ratioEnabling or disabling the array accelerator Using the Split Mirror command Enabling a script to exit on errorSet exitonerror=enable set eoe=disable Show exitonerror Enabling SmartCache Write-back Target modify latency=lowhighdisable? HBA modeController slot=5 modify latency=low Target modify hbamode=onoff? Power mode Using HP SSA scriptingRAID mode Using an Input script Capturing a configurationCreating an HP SSA script file Hpssascripting -c Filename -internal -external -e Filename Sample custom input script Script file requirements Date captured Wed Jan 15 153314 Version Sample custom capture script Sample encryption script Initial encryption configuration PlainText= Enable Encryption configuration Script file options Method mode Action modeControl category Controller category Controller ClearConfigurationWithDataLossCacheState ElevatorSortEnable DPOEnableIRPEnable DriveWriteCache NoBatteryWriteCache MNPDelayPower modes LicenseKey, DeleteLicenseKey SurfaceScanDelayExtended SurfaceScanDelayQueueDepth RapidParityInitialization Array category DPOEnable = No ElevatorSortEnable = Yes IRPEnable = NoArray ArrayR0 Drive CachingArrayDriveType OnlineSpareMode OnlineSpare Logical Drive categorySplitMirror LogicalDrive ArrayAcceleratorCachingLogicalDrive NumberOfParityGroups CachedLogicalDrivePreferredPath SetBootVolumeSecondary SetBootVolumePrimaryRenumber Repeat SizeBlocks SizeSmartCache Write-back StripSize Encryption controller category Encryption support commands Remove Suspend Resume ControllerPasswordMode EncryptionRecoveryQuestion Encryption logical volume category XML output XML support\hpssascripting -c out.xml XML input XML input file DTD Comment or clarification Code HP SSA scripting warning messages Error code Error message Comment or clarification HP SSA scripting error messages This error can occur when you attempt to add or Or logical drive Free space for the requested size 3011 Expand array and changed the size or RAID level ACCEPTEULA=YES About the utility HP Smart Storage Administrator Diagnostics Utility CLIReported information Troubleshooting Field Description Installing the utility Diagnostic report procedures Launching the utility in CLI modeSmartSSD Wear Gauge report procedures 512e Physical drive support Drive arrays and fault-tolerance methodsDrive arrays Identifying and viewing SmartSSD Wear Gauge report files Troubleshooting Troubleshooting Effects of a hard drive failure on logical drives Fault-tolerance methods RAID 1 and RAID 1+0 RAID RAID 0-No fault tolerance Troubleshooting RAID 1 ADM and RAID 10 ADM RAID 5-distributed data guarding RAID 6 ADG-Advanced Data Guarding RAID Comparing the hardware-based RAID methods Selecting a RAID method Alternative fault-tolerance methods Diagnostic tools Diagnosing array problemsTroubleshooting resources Troubleshooting HP Secure Encryption Optional components About Saap HP Smart Array Advanced Pack ILO Acronyms and abbreviations PXE Documentation feedback Index HP Smart Storage Administrator Diagnostics Utility XML DTD