Manuals / Dell / Computer Equipment / Server

Dell H710P, H310, H810 manual RAID Terminology, Disk Striping

Models: H310 H710 H710P H810

1 136

Download 136 pages 19.9 Kb

Page 130

RAID Terminology

•RAID 10 is a combination of RAID 0 and RAID 1, uses disk striping across mirrored disks. It provides high data throughput and complete data redundancy. RAID 10 can support up to eight spans, and up to 32 physical disks per span.

•RAID 50 is a combination of RAID 0 and RAID 5 where a RAID 0 array is striped across RAID 5 elements. RAID 50 requires at least six disks.

•RAID 60 is a combination of RAID 0 and RAID 6 where a RAID 0 array is striped across RAID 6 elements. RAID 60 requires at least eight disks.

RAID Terminology

Disk Striping

Disk striping allows you to write data across multiple physical disks instead of just one physical disk. Disk striping involves partitioning each physical disk storage space in stripes of the following sizes: 64 KB, 128 KB, 256 KB, 512 KB, and 1024 KB. The stripes are interleaved in a repeated sequential manner. The part of the stripe on a single physical disk is called a stripe element.

For example, in a four-disk system using only disk striping (used in RAID 0), segment 1 is written to disk 1, segment 2 is written to disk 2, and so on. Disk striping enhances performance because multiple physical disks are accessed simultaneously, but disk striping does not provide data redundancy.

Figure A-1 shows an example of disk striping.

Figure A-1. Example of Disk Striping (RAID 0)

Stripe element 1	Stripe element 2	Stripe element 3	Stripe element 4
Stripe element 5	Stripe element 6	Stripe element 7	Stripe element 8
Stripe element 9	Stripe element 10	Stripe element 11	Stripe element 12

130

Appendix: RAID Description

Image 130

Dell H710P, H310, H810 manual RAID Terminology, Disk Striping

Contents

Dell PowerEdge RAID Controller PERC H310 H710, H710P, and H810 User’s GuideNotes, Cautions, and Warnings Model UCPA-801, UCPB-800, UCPM-800 and UCPE-800Supported Operating Systems ContentsPhysical Disk Power Management Types of Virtual Disk InitializationReconfiguration of Virtual Disks 3 Deploying the PERC CardWrite-Back With No Battery is Employed Using Persistent Hot Spare SlotsSupport For Internal Setting up Redundant Path SupportInstalling the Windows Drivers Reverting to Single Path SupportBIOS Configuration Utility 5 Management ApplicationsVirtual Disk Management CacheCade Virtual Disk Characteristics UEFI RAID Configuration UtilityConfiguring and Managing Security Key Implementation 7 Security Key andTroubleshooting Security Key Errors Security Key Management in theWith Preserved Cache Error Message Missing Disks in Virtual Disk Error MessageMissing Virtual Disks Error Message Virtual Disks Degraded Error MessageDegraded State of Virtual Disks Unable to Rebuild a Fault Tolerant Virtual DiskFatal Error or Data Corruption Reported PERC Card Not Seen in Device ManagerA Appendix RAID Description Linux Operating System ErrorsContents Overview H710 SpecificationH310 H710PSupported Operating Systems 1 Go to support.dell.com Related DocumentationContacting Dell 3 Select Select a Product in Product Support 4 Select Enter a TagFeatures Physical Disk Power ManagementTypes of Virtual Disk Initialization Configured Spin Down DelayBackground Initialization of Virtual Disks Full Initialization of Virtual Disks Fast Initialization of Virtual DisksConsistency Checks Disk RoamingVirtual Disk Migration Perform the following steps to use disk migration Virtual Disk Write Cache Policies Write-Back and Write-ThroughVirtual Disk Read Cache Policies Conditions Under Which Forced Write-Back With No Battery is EmployedConditions Under Which Write-Back is Employed Reconfiguration of Virtual Disks Table 2-1. RAID Level Migration a mirrored virtual disk by adding one diskFault Tolerance The SMART FeaturePatrol Read Automatic Replace Member with Predicted FailureRedundant Path Support For PERC H810 Only Physical Disk Failure Detection Using Persistent Hot Spare SlotsPhysical Disk Hot Swapping Using Replace Member and Revertible Hot Spares Controller Cache PreservationCache Preservation With Non-Volatile Cache NVC Battery Transparent Learn CycleCache Data Recovery TLC Time FrameWhen to Replace the Battery Features Deploying the PERC Card Installing the PERC Controller Removing the PERC ControllerPCIe slot Figure 3-1. Removing and Installing the PERC AdapterSAS cable connectors2 PERC adapterFigure 3-2. Removing and Installing the PERC Mini Blade Controller PERC stack-up connectorSupport For Internal Multiple Controllers PERC mini monolithic controllerSetting up Redundant Path Support on the PERC H810 Adapter Page Figure 3-4. Redundant Path Support Configuration With Two Enclosures storageInstalling the Windows Drivers Driver InstallationCreating the Driver Media 3 Click Continue Pre-Installation RequirementsCreating the Device Driver Media Downloading Drivers From the Dell Support Website1 Turn off the system 2 Install the new RAID controller in the system Updating Existing Windows Server 2008 or Windows Server 2008 R2 8 Select Install from a list or specific location4 Click Device Manager Updating the Linux Driver Installing or Updating the RPM Driver Package With DKMS Support Installing or Updating the RPM Driver Package With KMOD SupportInstalling or Updating the RPM Driver Package With KMP Support Upgrading the KernelDriver Installation Management Applications for PERC Cards Dell OpenManage Storage ManagementBIOS Configuration Utility Entering the BIOS Configuration UtilityTable 5-1. Menu Navigation Keys Exiting the Configuration UtilityMenu Navigation Controls NotationNotation to exit the BIOS Configuration UtilityTable 5-1. Menu Navigation Keys continued Meaning and UseNotation Setting Up Virtual DisksTable 5-1. Menu Navigation Keys continued Meaning and UseDescription Table 5-2. Virtual Disk Parameters and DescriptionsParameter RAID LevelParameter or Adaptive. The default is Adaptive-Read-AheadTable 5-2. Virtual Disk Parameters and Descriptions continued DescriptionVirtual Disk Management Creating Virtual Disks10 Select additional disks, if required j Press Tab to move the cursor to Initialize and press Enter Converting Physical Disk to Non-RAID for PERC H310 Converting Physical Disk to RAID Capable for PERC H310Initializing Virtual Disks Checking Data Consistency Importing or Clearing Foreign Configurations Using the VD Mgmt Menu All the physical disks in a configuration are removed and re-inserted a Select Foreign Configuration View to display the Break Mirror Break Mirror in BIOS Configuration Utility Managing Preserved Cache 3 Select Manage Preserved CacheCreating a dedicated hot spare Managing Dedicated Hot SparesDeleting a dedicated hot spare Deleting Virtual Disks Deleting Disk Groups4 Select Clear Config BIOS Configuration Utility Menu OptionsClearing the Configuration Virtual Disk Management VD Mgmt menuVirtual Disk Management VD Mgmt Virtual Disks Physical DisksVirtual Disks Information Displayed in Right Panelin Left Panel Disk Group # PropertiesMenu Item Selected Information Displayed in Right Panel in Left Panel Management Applications for PERC Cardsin Left Panel Information Displayed in Right PanelManagement Applications for PERC Cards Action Virtual Disk ActionsTable 5-4. Virtual Disk Actions DescriptionPhysical Disk Management PD Mgmt Physical Disk Actions RebuildController Management Ctrl Mgmt Table 5-8. Controller Management Options Controller Management ActionsConfiguration Utility CtrlR OptionSetting LED Blinking Foreign Configuration ViewPhysical Disk Management Creating Global Hot Spares Removing Global or Dedicated Hot SparesReplacing an Online Physical Disk Stopping Background Initialization Restrictions and LimitationsController Management Enabling Boot SupportPerforming a Manual Rebuild of an Individual Physical Disk Enabling BIOS Stop on Error Enabling Auto Import Restoring Factory Default Settings UEFI RAID Configuration UtilityEntering the UEFI RAID Configuration Utility Exiting the UEFI RAID Configuration Utility Configuration OptionsController Management Virtual Disk Management Physical Disk ManagementEnclosure Management CacheCade Virtual Disk Characteristics CacheCadeConfiguring and Managing CacheCade Virtual Disks CacheCade Virtual Disk ManagementCreate CacheCade Virtual Disk 5 Select Create CacheCade Virtual Disk and press EnterReconfiguring CacheCade Virtual Disks Delete CacheCade Virtual DiskAutomatic Reconfiguration of CacheCade Virtual Disks Manual Resizing of CacheCade Virtual Disks Security Key and RAID Management Security Key Management in the BIOS Configuration UtilitySecurity Key Implementation Local Key Management LKM Create Security KeyChange Security Key Delete Security Key Creating Secured Virtual Disks Securing Pre-Existing Virtual DisksPage Instant Secure Erase Failure to Select or Configure Non Self-Encrypting Disks non-SED Troubleshooting Security Key ErrorsSecured Foreign Import Errors Failure to Delete Security KeyFailure to Instant Secure Erase Task on Physical Disks Security Key and RAID Management Discovery Error Message TroubleshootingBIOS Error Messages Extra Enclosure Error MessageMissing Disks in Virtual Disk Error Message Cache Data Lost Error MessageError Message The following virtual disks have missing Previous Configuration of Disks Removed Error Message Missing Virtual Disks Error MessageBIOS Disabled Error Message Dirty Cache Data Error MessageCorrective Action Enable the ROM option Adapter at Baseport not Responding Error Message Drive Configuration Changes Error MessageOffline or Missing Virtual Drives With Preserved Cache Error Message Virtual Disks Partially Degraded Error Message Virtual Disks Offline Error MessageVirtual Disks Degraded Error Message Memory or Battery Problem Error MessageForeign Configuration Found Error Message Firmware Fault State Error MessageError Message Firmware is in Fault State Previous Configuration Cleared or Missing Error Message Foreign Configuration Not Found in CtrlR Error MessageInvalid SAS Topology Detected Error Message Multibit ECC Errors Detected Error Messages Configured Disks Removed or Not Accessible Error MessageDegraded State of Virtual Disks Memory ErrorsBattery Discharged or Disconnected Error Message Corrective ActionPERC Card Has Yellow Bang in Device Manager General IssuesPreserved Cache State PERC Card Not Seen in Device ManagerUnable to Rebuild a Fault Tolerant Virtual Disk Physical Disk IssuesPhysical Disk in Failed State Multiple Disks Become Inaccessible Fatal Error or Data Corruption ReportedPhysical Disk Displayed as Blocked Virtual Disk Fails During Rebuild Using a Dedicated Hot Spare Virtual Disk Fails During Rebuild Using a Global Hot SpareRebuilding a Failed Physical Disk Physical Disk Takes a Long Time to Rebuild Virtual Disk Fails Rebuild Using a Dedicated Hot SparePhysical Disk Fails During Reconstruction on Redundant Virtual Disk Issue A physical disk is taking longer than expected to rebuildSmart Error Detected on a Physical Disk in a Redundant Virtual Disk SMART ErrorsCorrective Action Source Disk Fails During Replace Member Operation Replace Member ErrorsSmart Error Detected on a Physical Disk in a Non-Redundant Virtual Target Disk FailsVirtual Disk Policy is Assumed as Write-Through Error Message Linux Operating System ErrorsDriver Does not Auto-Build into New Kernel Unable to Register SCSI Device Error Message Error MessageDisk Carrier LED Indicators Figure 8-1. Disk Carrier LED IndicatorsAppendix RAID Description Summary of RAID LevelsRAID Terminology Disk StripingSpanned RAID Levels Disk MirroringParity Data Figure A-4. Example of Dual Distributed Parity RAID Figure A-3. Example of Distributed Parity RAIDParity Index Page write policy Index