Dell H310, H710P, H810 manual Appendix RAID Description, Summary of RAID Levels, 129

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Appendix: RAID Description

RAID is a group of independent physical disks that provides high performance by increasing the number of disks used for saving and accessing data.

A RAID disk subsystem offers the following benefits:

•Improved I/O performance and data availability.

•Improved data throughput because several disks are accessed simultaneously. The physical disk group appears either as a single storage unit or multiple logical units to the host system.

•Improved data storage availability and fault tolerance. Data loss caused by a physical disk failure can be recovered by rebuilding missing data from the remaining physical disks containing data or parity.

CAUTION: In the event of a physical disk failure, a RAID 0 virtual disk fails, resulting in data loss.

Summary of RAID Levels

NOTE: PERC H710, H710P and H810 cards support all RAID levels listed below. PERC H310 does not support RAID 6 and RAID 60.

•RAID 0 uses disk striping to provide high data throughput, especially for large files in an environment that requires no data redundancy.

•RAID 1 uses disk mirroring so that data written to one physical disk is simultaneously written to another physical disk. RAID 1 is good for small databases or other applications that require small capacity and complete data redundancy.

•RAID 5 uses disk striping and parity data across all physical disks (distributed parity) to provide high data throughput and data redundancy, especially for small random access.

•RAID 6 is an extension of RAID 5 and uses an additional parity block. RAID 6 uses block-level striping with two parity blocks distributed across all member disks. RAID 6 provides protection against double disk failures, and failures while a single disk is rebuilding. If you are using only one array, deploying RAID 6 is more effective than deploying a hot spare disk.

Appendix: RAID Description

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Contents User’s Guide Model UCPA-801, UCPB-800, UCPM-800 and UCPE-800 Contents Battery Transparent Learn Cycle Removing the Perc Controller Installing the Perc ControllerAutomatic Replace Member Installing the Windows Drivers Setting up Redundant Path SupportSupport For Internal Reverting to Single Path SupportVirtual Disk Management Bios Configuration UtilityUefi RAID Configuration Utility Security Key Implementation Security Key Management Troubleshooting Security Key Errors109 119 Degraded State of Virtual Disks 118120 124Linux Operating System Errors 126 125128 Contents Overview GB DDR3 Supported Operating Systems Contacting Dell Related DocumentationGo to support.dell.com Visit support.dell.comPhysical Disk Power Management FeaturesSavings mode Configured Spin Down DelayTypes of Virtual Disk Initialization Background Initialization of Virtual DisksFast Initialization of Virtual Disks Full Initialization of Virtual DisksDisk Roaming Consistency ChecksVirtual Disk Migration Features Write-Back and Write-Through Virtual Disk Write Cache PoliciesConditions Under Which Write-Back is Employed Virtual Disk Read Cache PoliciesReconfiguration of Virtual Disks RAID Level Migration Smart Feature Fault ToleranceAutomatic Replace Member with Predicted Failure Patrol ReadRedundant Path Support For Perc H810 Only Using Persistent Hot Spare Slots Physical Disk Failure DetectionPhysical Disk Hot Swapping Controller Cache Preservation Using Replace Member and Revertible Hot SparesCache Data Recovery Battery Transparent Learn CycleCache Preservation With Non-Volatile Cache NVC TLC Time FrameWhen to Replace the Battery Features Deploying the Perc Card Removing the Perc Controller Installing the Perc ControllerRemoving and Installing the Perc Adapter Removing and Installing the Perc Mini Blade Controller Support For Internal Multiple Controllers Removing and Installing the Perc Mini Monolithic ControllerSetting up Redundant Path Support on the Perc H810 Adapter Deploying the Perc Card Redundant Path Support Configuration With Two Enclosures Driver Installation Installing the Windows DriversCreating the Driver Media Creating the Device Driver Media Pre-Installation RequirementsClick Continue Downloading Drivers From the Dell Support WebsiteDriver Installation Click Device Manager Select Install from a list or specific locationUpdating the Linux Driver Driver Installation Upgrading the Kernel Driver Installation Dell OpenManage Storage Management Management Applications for Perc CardsEntering the Bios Configuration Utility Bios Configuration UtilityExiting the Configuration Utility Menu Navigation ControlsMenu Navigation Keys Notation Meaning and Use Example To exit the Bios Configuration Utility Mgmt, Ctrl Mgmt, and Foreign View PD Mgmt Setting Up Virtual DisksRAID Level Virtual Disk Parameters and DescriptionsWrite Policy Creating Virtual Disks Virtual Disk ManagementManagement Applications for Perc Cards Management Applications for Perc Cards Converting Physical Disk to RAID Capable for Perc H310 Converting Physical Disk to Non-RAID for Perc H310Initializing Virtual Disks Checking Data Consistency Management Applications for Perc Cards Management Applications for Perc Cards Select Foreign Configuration View to display Break Mirror Break Mirror in Bios Configuration Utility Select Manage Preserved Cache Managing Preserved CacheManaging Dedicated Hot Spares Creating a dedicated hot spareDeleting a dedicated hot spare Deleting Disk Groups Deleting Virtual DisksBios Configuration Utility Menu Options Clearing the ConfigurationSelect Clear Config Virtual Disks Physical Disks Virtual Disk Management VD MgmtInformation on the Virtual Disk Management Screen Information Displayed in Right PanelVirtual Disks Disk Group # Properties Management Applications for Perc Cards Information on the Virtual Disk Management Screen Virtual Disk Actions Description Virtual Disk ActionsPhysical Disk Management PD Mgmt Physical Disk Actions RebuildPhysical Disk Actions Description Controller Management Ctrl Mgmt Controller Management Actions Controller Management Options DescriptionNon-RAID drive Foreign Configuration View Setting LED BlinkingPhysical Disk Management Removing Global or Dedicated Hot Spares Creating Global Hot SparesReplacing an Online Physical Disk Restrictions and Limitations Stopping Background InitializationEnabling Boot Support Controller ManagementPerforming a Manual Rebuild of an Individual Physical Disk Enabling Bios Stop on Error Enabling Auto Import Uefi RAID Configuration Utility Restoring Factory Default SettingsEntering the Uefi RAID Configuration Utility Configuration Options Exiting the Uefi RAID Configuration UtilityController Management Physical Disk Management Virtual Disk ManagementEnclosure Management CacheCade CacheCade Virtual Disk CharacteristicsCacheCade Virtual Disk Management Configuring and Managing CacheCade Virtual DisksSelect Create CacheCade Virtual Disk and press Enter Create CacheCade Virtual DiskDelete CacheCade Virtual Disk Reconfiguring CacheCade Virtual DisksAutomatic Reconfiguration of CacheCade Virtual Disks Manual Resizing of CacheCade Virtual Disks Security Key Management in the Bios Configuration Utility Security Key and RAID ManagementSecurity Key Implementation Local Key Management LKM Create Security Key100 101 Change Security Key102 Delete Security KeyCreating Secured Virtual Disks Securing Pre-Existing Virtual Disks103 104 105 Instant Secure EraseSecured Foreign Import Errors Troubleshooting Security Key ErrorsFailure to Delete Security Key 106107 Failure to Instant Secure Erase Task on Physical Disks108 Bios Error Messages TroubleshootingDiscovery Error Message Extra Enclosure Error MessageCache Data Lost Error Message Missing Disks in Virtual Disk Error Message110 Previous Configuration of Disks Removed Error Message Missing Virtual Disks Error Message111 Bios Disabled Error Message Dirty Cache Data Error MessageCorrective Action Enable the ROM option 112Drive Configuration Changes Error Message Adapter at Baseport not Responding Error Message113 Virtual Disks Degraded Error Message Virtual Disks Offline Error MessageVirtual Disks Partially Degraded Error Message Memory or Battery Problem Error MessageFirmware Fault State Error Message Foreign Configuration Found Error Message115 Previous Configuration Cleared or Missing Error Message Foreign Configuration Not Found in CtrlR Error MessageInvalid SAS Topology Detected Error Message 116Multibit ECC Errors Detected Error Messages Configured Disks Removed or Not Accessible Error Message117 Battery Discharged or Disconnected Error Message Memory ErrorsDegraded State of Virtual Disks Corrective ActionPreserved Cache State General IssuesPerc Card Has Yellow Bang in Device Manager Perc Card Not Seen in Device ManagerUnable to Rebuild a Fault Tolerant Virtual Disk Physical Disk IssuesPhysical Disk in Failed State 120Multiple Disks Become Inaccessible Fatal Error or Data Corruption ReportedPhysical Disk Displayed as Blocked 121Virtual Disk Fails During Rebuild Using a Global Hot Spare Rebuilding a Failed Physical Disk122 Virtual Disk Fails Rebuild Using a Dedicated Hot Spare Physical Disk Takes a Long Time to Rebuild123 124 Smart ErrorsSource Disk Fails During Replace Member Operation Replace Member ErrorsTarget Disk Fails General Disk FailsLinux Operating System Errors Driver Does not Auto-Build into New Kernel126 Unable to Register Scsi Device Error Message Error Message127 128 Disk Carrier LED IndicatorsAppendix RAID Description Summary of RAID Levels129 RAID Terminology Disk Striping130 Spanned RAID Levels Disk MirroringParity Data 131Figure A-4. Example of Dual Distributed Parity RAID Figure A-3. Example of Distributed Parity RAID133 Index134 RAID135 136
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H310, H710, H710P, H810 specifications

Dell offers a range of storage controller technologies, notably the H810, H710, H710P, and H310, which cater to different enterprise needs. These controllers are designed to support various storage configurations, enhancing overall system performance and reliability.

The Dell H810 is a high-performance PCIe 3.0 RAID controller that supports up to eight internal drives and is particularly suited for demanding workloads. It features advanced RAID levels including RAID 0, 1, 5, 6, 10, 50, and 60, providing flexibility for various data protection strategies. The H810 also supports up to 32TB of storage capacity, making it suitable for environments that require substantial data management capabilities.

The H710 is another powerful RAID controller, widely recognized for its balance of performance and cost-efficiency. It features 1GB of cache memory, which aids in accelerating read and write operations. The H710 supports the same RAID levels as the H810 and allows for up to 512MB of non-volatile memory. This ensures data integrity even in the event of a power failure, making it reliable for critical applications.

The H710P is an enhanced version of the H710, with a significant upgrade in its cache capabilities. It offers 2GB of battery-backed cache memory, further enhancing data processing speeds and improving responsiveness. The H710P is ideal for intensive workloads and virtualization, where rapid access to data is essential. This controller also includes features such as RAID storage pooling, intelligent data tiering, and support for multiple virtual disks.

Finally, the H310 is a cost-effective option for small to medium-sized businesses or those with less demanding storage requirements. It offers similar RAID support as the higher-end controllers but operates with a simpler architecture. The H310 features 512MB of cache, providing sufficient performance for regular workloads without the additional complexities of more advanced controllers.

In summary, Dell's H810, H710, H710P, and H310 storage controllers each serve distinct purposes, providing various features, technologies, and performance characteristics tailored to different business needs. From high-capacity storage solutions to user-friendly setups, Dell’s offerings ensure that organizations can efficiently manage their data storage requirements.
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