Dell H710P, H310, H810 manual Figure A-3. Example of Distributed Parity RAID

Page 132

The parity data is distributed across all the physical disks in the system. If a single physical disk fails, it can be rebuilt from the parity and the data on the remaining physical disks. RAID level 5 combines distributed parity with disk striping, as shown in Figure A-3. Parity provides redundancy for one physical disk failure without duplicating the contents of entire physical disks.

RAID 6 combines dual distributed parity with disk striping. This level of parity allows for two disk failures without duplicating the contents of entire physical disks.

Figure A-3. Example of Distributed Parity (RAID 5)

Stripe element 1

Stripe element 2

Stripe element 3

Stripe element 4

Stripe element 5

Parity (1–5)

Stripe element 7

Stripe element 8

Stripe element 9

Stripe element 10

Parity (6–10)

Stripe element 6

Stripe element 13

Stripe element 14

Stripe element 15

Parity (11–15)

Stripe element 11

Stripe element 12

Stripe element 19

Stripe element 20

Parity (16–20) Stripe element 16

Stripe element 17

Stripe element 18

Stripe element 25

Parity (21–25)

Stripe element 21

Stripe element 22

Stripe element 23

Stripe element 24

Parity (26–30)

Stripe element 26

Stripe element 27

Stripe element 28

Stripe element 29

Stripe element 30

NOTE: Parity is distributed across multiple physical disks in the disk group.

Figure A-4. Example of Dual Distributed Parity (RAID 6)

Stripe element 1

Stripe element 2

Stripe element 3

Stripe element 4

Parity (1–4)

Parity (1–4)

Stripe element 5

Stripe element 6

Parity (5–8)

Parity (5–8)

Stripe element 7

Stripe element 8

Parity (9–12)

Parity (9–12)

Stripe element 9

Stripe element 10

Stripe element 11

Stripe element 12

Stripe element 13

Stripe element 14

Parity (13–16)

Parity (13–16)

Stripe element 15

Stripe element 16

NOTE: Parity is distributed across all disks in the array.

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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 Setting up Redundant Path Support Installing the Windows DriversSupport For Internal Reverting to Single Path SupportBios Configuration Utility Virtual Disk ManagementUefi RAID Configuration Utility Troubleshooting Security Key Errors Security Key Implementation Security Key Management109 Degraded State of Virtual Disks 118 119120 124Linux Operating System Errors 126 125128 Contents Overview GB DDR3 Supported Operating Systems Related Documentation Contacting DellGo to support.dell.com Visit support.dell.comFeatures Physical Disk Power ManagementConfigured Spin Down Delay Savings modeTypes of Virtual Disk Initialization Background Initialization of Virtual DisksFull Initialization of Virtual Disks Fast Initialization of Virtual DisksConsistency Checks Disk RoamingVirtual Disk Migration Features Virtual Disk Write Cache Policies Write-Back and Write-ThroughVirtual Disk Read Cache Policies Conditions Under Which Write-Back is EmployedReconfiguration of Virtual Disks RAID Level Migration Fault Tolerance Smart FeaturePatrol Read Automatic Replace Member with Predicted FailureRedundant Path Support For Perc H810 Only Using Persistent Hot Spare Slots Physical Disk Failure DetectionPhysical Disk Hot Swapping Using Replace Member and Revertible Hot Spares Controller Cache PreservationBattery Transparent Learn Cycle Cache Data RecoveryCache Preservation With Non-Volatile Cache NVC TLC Time FrameWhen to Replace the Battery Features Deploying the Perc Card Installing the Perc Controller Removing the Perc ControllerRemoving and Installing the Perc Adapter Removing and Installing the Perc Mini Blade Controller Removing and Installing the Perc Mini Monolithic Controller Support For Internal Multiple ControllersSetting 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 Pre-Installation Requirements Creating the Device Driver MediaClick Continue Downloading Drivers From the Dell Support WebsiteDriver Installation Select Install from a list or specific location Click Device ManagerUpdating the Linux Driver Driver Installation Upgrading the Kernel Driver Installation Management Applications for Perc Cards Dell OpenManage Storage ManagementBios Configuration Utility Entering the Bios Configuration UtilityExiting the Configuration Utility Menu Navigation ControlsMenu Navigation Keys Notation Meaning and Use Example To exit the Bios Configuration Utility Setting Up Virtual Disks Mgmt, Ctrl Mgmt, and Foreign View PD MgmtVirtual Disk Parameters and Descriptions RAID LevelWrite Policy Virtual Disk Management Creating Virtual DisksManagement 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 Managing Preserved Cache Select Manage Preserved CacheManaging Dedicated Hot Spares Creating a dedicated hot spareDeleting a dedicated hot spare Deleting Virtual Disks Deleting Disk GroupsBios Configuration Utility Menu Options Clearing the ConfigurationSelect Clear Config Virtual Disk Management VD Mgmt Virtual Disks Physical DisksInformation 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 Virtual Disk Actions DescriptionPhysical 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 Creating Global Hot Spares Removing Global or Dedicated Hot SparesReplacing an Online Physical Disk Stopping Background Initialization Restrictions and LimitationsEnabling 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 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 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 Management in the Bios Configuration Utility Security Key and RAID ManagementSecurity Key Implementation Local Key Management LKM Create Security Key100 Change Security Key 101Delete Security Key 102Creating Secured Virtual Disks Securing Pre-Existing Virtual Disks103 104 Instant Secure Erase 105Troubleshooting Security Key Errors Secured Foreign Import ErrorsFailure to Delete Security Key 106Failure to Instant Secure Erase Task on Physical Disks 107108 Troubleshooting Bios Error MessagesDiscovery 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 Dirty Cache Data Error Message Bios Disabled Error MessageCorrective Action Enable the ROM option 112Drive Configuration Changes Error Message Adapter at Baseport not Responding Error Message113 Virtual Disks Offline Error Message Virtual Disks Degraded Error MessageVirtual Disks Partially Degraded Error Message Memory or Battery Problem Error MessageFirmware Fault State Error Message Foreign Configuration Found Error Message115 Foreign Configuration Not Found in CtrlR Error Message Previous Configuration Cleared or Missing Error MessageInvalid SAS Topology Detected Error Message 116Multibit ECC Errors Detected Error Messages Configured Disks Removed or Not Accessible Error Message117 Memory Errors Battery Discharged or Disconnected Error MessageDegraded State of Virtual Disks Corrective ActionGeneral Issues Preserved Cache StatePerc Card Has Yellow Bang in Device Manager Perc Card Not Seen in Device ManagerPhysical Disk Issues Unable to Rebuild a Fault Tolerant Virtual DiskPhysical Disk in Failed State 120Fatal Error or Data Corruption Reported Multiple Disks Become InaccessiblePhysical 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 Smart Errors 124Replace Member Errors Source Disk Fails During Replace Member OperationTarget 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 Disk Carrier LED Indicators 128Appendix RAID Description Summary of RAID Levels129 RAID Terminology Disk Striping130 Disk Mirroring Spanned RAID LevelsParity Data 131Figure A-3. Example of Distributed Parity RAID Figure A-4. Example of Dual Distributed Parity RAIDIndex 133RAID 134135 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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