Dell H710P, H310, H810 manual Disk Mirroring, Spanned RAID Levels, Parity Data

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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 6. Example of Disk Striping (RAID 0)

Disk Mirroring

With mirroring (used in RAID 1), data written to one disk is simultaneously written to another disk. If one disk fails, the contents of the other disk can be used to run the system and rebuild the failed physical disk. The primary advantage of disk mirroring is that it provides complete data redundancy. Both disks contain the same data at all times. Either of the physical disks can act as the operational physical disk.

Disk mirroring provides complete redundancy, but is an expensive option because each physical disk in the system must be duplicated.

NOTE: Mirrored physical disks improve read performance by read load balance.

Figure 7. Example of Disk Mirroring (RAID 1)

Spanned RAID Levels

Spanning is a term used to describe the way in which RAID levels 10, 50, and 60 are constructed from multiple sets of basic, or simple RAID levels. For example, a RAID 10 has multiple sets of RAID 1 arrays where each RAID 1 set is considered a span. Data is then striped (RAID 0) across the RAID 1 spans to create a RAID 10 virtual disk. Similarly, RAID 50 and RAID 60 combine multiple sets of RAID 5 or RAID 6 respectively with striping.

Parity Data

Parity data is redundant data that is generated to provide fault tolerance within certain RAID levels. In the event of a disk failure, the parity data can be used by the controller to regenerate user data. Parity data is present for RAID 5, 6, 50, and 60.

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. Parity provides redundancy for one physical disk failure without duplicating the contents of the entire physical disks.

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Contents H710P, and H810 User’s Guide Dell Inc. All Rights Reserved Contents Support For Internal Multiple Controllers Driver InstallationDeploying The Perc Card Management Applications For Perc CardsCacheCade Security Key And RAID Management Security Key Management In The Bios Configuration UtilityTroubleshooting Appendix RAID Description Multiple Disks Become InaccessibleSource Disk Fails During Replace Member Operation Disk Mirroring Specification H310 H710 H710P OverviewGetting Help Specification H310 H710 H710P H810Supported Operating Systems Spans per Disk GroupDocumentation Feedback Contacting DellRelated Documentation Page Configured Spin Down Delay FeaturesPhysical Disk Power Management There are four power saving modes availableBackground Initialization Of Virtual Disks Types Of Virtual Disk InitializationConsistency Checks Full Initialization Of Virtual DisksDisk Roaming Using Disk RoamingConfiguring FastPath-Capable Virtual Disks FastPathRead Virtual Disk MigrationMigrating Virtual Disks WriteConditions Under Which Write-Back Is Employed Virtual Disk Write Cache PoliciesWrite-Back And Write-Through Source RAID Reconfiguration Of Virtual DisksVirtual Disk Read Cache Policies Number Capacity Description LevelDisk by adding Disk into aMirrored virtual One diskAutomatic Replace Member With Predicted Failure Fault ToleranceSmart Feature Reclaims diskPatrol Read Redundant Path Support For Perc H810 OnlyPhysical Disk Failure Detection Using Persistent Hot Spare SlotsUsing Replace Member And Revertible Hot Spares Physical Disk Hot SwappingBattery Transparent Learn Cycle Controller Cache PreservationPage Deploying The Perc Card Removing The Perc ControllerPCIe slot SAS cable connectors Perc adapter Screw Removing and Installing the Perc AdapterInstalling The Perc Controller Removing and Installing the Perc Mini Monolithic ControllerSetting Up Redundant Path Support On The Perc H810 Adapter Support For Internal Multiple ControllersRedundant Path Support Configuration With Two Enclosures Server StoragePage Click Continue Driver InstallationInstalling a driver Popular support tools section, click Drivers and Downloads Updating The Linux Driver Reboot the system when promptedSelect Install from a list or specific location Click on the Hardware tabUpgrading The Kernel Version installed Page Management Applications For Perc Cards Bios Configuration UtilityEntering The Bios Configuration Utility Dell OpenManage Storage ManagementMenu Navigation Controls Exiting The Configuration UtilityTo exit the Bios Configuration Utility Ctrl R Notation Meaning and Use ExampleCtrl Mgmt, and Foreign View Setting Up Virtual DisksNotation Meaning and Use Mgmt, Ctrl Mgmt, and Foreign ViewParameter Description Summary Of RAID LevelsParameterDescription Virtual Disk ManagementCreating Virtual Disks Select Create New VD and press EnterSelecting Virtual Disk Parameters Converting Physical Disk To RAID Capable For Perc H310Checking Data Consistency Converting Physical Disk To Non-RAID For Perc H310Initializing Virtual Disks Running a Data Consistency CheckPage Page Choose Break Mirror and press Enter Break MirrorManaging Preserved Cache Select Manage Ded. HS and press Enter Managing Dedicated Hot SparesSelect Manage Preserved Cache Deleting Virtual Disks Clearing The ConfigurationSelect Clear Config Deleting Disk GroupsVirtual Disks Physical Disks Bios Configuration Utility Menu OptionsVirtual Disk Management VD Mgmt Security property of the Disk Group Virtual Disks Virtual Disk Actions Action DescriptionPhysical Disk Management PD Mgmt Physical Disk ActionsController Management Actions RebuildController Management Ctrl Mgmt Physical Disk Management Foreign Configuration ViewSetting LED Blinking Replacing An Online Physical Disk Creating Global Hot SparesRemoving Global Or Dedicated Hot Spares Performing a Manual Rebuild Of An Individual Physical Disk Restrictions and LimitationsStopping Background Initialization Enabling Bios Stop On Error Enabling Boot SupportEnabling Boot Support For a BIOS-Enabled Controller Controller ManagementEntering The Uefi RAID Configuration Utility Uefi RAID Configuration UtilityRestoring Factory Default Settings Disabling Auto ImportDevice Settings menu Exiting The Uefi RAID Configuration UtilityConfiguration Options Controller Management MenuEnclosure Management Virtual Disk ManagementPhysical Disk Management Menu CacheCade CacheCade Virtual Disk CharacteristicsConfiguring And Managing CacheCade Virtual Disks Select Create CacheCade Virtual Disk and press Enter CacheCade Virtual Disk ManagementCreating CacheCade Virtual Disks Deleting CacheCade Virtual Disks Reconfiguring CacheCade Virtual DisksAutomatic Reconfiguration Of CacheCade Virtual Disks Manual Resizing Of CacheCade Virtual DisksPage Security Key Implementation Security Key Management In The Bios Configuration UtilitySecurity Key And RAID Management Local Key Management LKMCreating a Security Key Changing The Security KeySecuring Pre-Existing Virtual Disks Deleting a Security KeyCreating Secured Virtual Disks Highlight the Secure Disk Group option and press Enter Instant Secure Erase Troubleshooting Security Key ErrorsSecured Foreign Import Errors Failure To Delete Security Key Failure To Instant Secure Erase Task On Physical DisksDiscovery Error Message TroubleshootingBios Error Messages Extra Enclosure Error MessageMissing Virtual Disks Error Message Missing Disks In Virtual Disk Error MessagePrevious Configuration Of Disks Removed Error Message Drive Configuration Changes Error Message Dirty Cache Data Error MessageBios Disabled Error Message Virtual Disks Degraded Error Message Adapter At Baseport Not Responding Error MessageVirtual Disks Offline Error Message Action Cable problems, press any key or Y to continueFirmware Fault State Error Message Virtual Disks Partially Degraded Error MessageMemory Or Battery Problem Error Message Foreign Configuration Found Error MessageInvalid SAS Topology Detected Error Message Foreign Configuration Not Found In Ctrl R Error MessagePrevious Configuration Cleared Or Missing Error Message Multibit ECC Errors Detected Error MessagesDegraded State Of Virtual Disks Configured Disks Removed Or Not Accessible Error MessageBattery Discharged Or Disconnected Error Message Preserved Cache State Memory ErrorsGeneral Issues Perc Card Has Yellow Bang In Device ManagerFatal Error Or Data Corruption Reported Physical Disk IssuesUnable to Rebuild a Fault Tolerant Virtual Disk Physical Disk In Failed StateRebuilding a Failed Physical Disk Multiple Disks Become InaccessibleVirtual Disk Fails During Rebuild Using a Global Hot Spare Virtual diskPhysical Disk Takes a Long Time To Rebuild Smart ErrorsVirtual Disk Fails Rebuild Using a Dedicated Hot Spare Issue General disk fails Corrective Replace Member ErrorsLinux Operating System Errors ErrorReboot to the new kernel Unable To Register Scsi Device Error MessageInstall a DKMS-enabled driver package Driver Does Not Auto-Build Into New KernelDisk Carrier LED Indicators Activity LED Status LEDRAID Terminology Appendix RAID DescriptionSummary Of RAID Levels Disk StripingParity Data Disk MirroringSpanned RAID Levels Example of Distributed Parity RAID
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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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