Dell H310 Appendix RAID Description, Summary Of RAID Levels, RAID Terminology, Disk Striping

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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.

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

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.

Summary Of RAID Levels

NOTE: PERC H710, H710P and H810 cards support all RAID levels listed below. PERC H310 supports RAID 5 with limited performance and 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.

•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.

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Contents H710P, and H810 User’s Guide Dell Inc. All Rights Reserved Contents Deploying The Perc Card Driver InstallationSupport For Internal Multiple Controllers Management Applications For Perc CardsCacheCade Troubleshooting Security Key Management In The Bios Configuration UtilitySecurity Key And RAID Management Source Disk Fails During Replace Member Operation Multiple Disks Become InaccessibleAppendix RAID Description Disk Mirroring Overview Specification H310 H710 H710PSupported Operating Systems Specification H310 H710 H710P H810Getting Help Spans per Disk GroupRelated Documentation Contacting DellDocumentation Feedback Page Physical Disk Power Management FeaturesConfigured Spin Down Delay There are four power saving modes availableConsistency Checks Types Of Virtual Disk InitializationBackground Initialization Of Virtual Disks Full Initialization Of Virtual DisksConfiguring FastPath-Capable Virtual Disks Using Disk RoamingDisk Roaming FastPathMigrating Virtual Disks Virtual Disk MigrationRead WriteWrite-Back And Write-Through Virtual Disk Write Cache PoliciesConditions Under Which Write-Back Is Employed Virtual Disk Read Cache Policies Reconfiguration Of Virtual DisksSource RAID Number Capacity Description LevelMirrored virtual Disk into aDisk by adding One diskSmart Feature Fault ToleranceAutomatic Replace Member With Predicted Failure Reclaims diskRedundant Path Support For Perc H810 Only Patrol ReadUsing Replace Member And Revertible Hot Spares Using Persistent Hot Spare SlotsPhysical Disk Failure Detection Physical Disk Hot SwappingController Cache Preservation Battery Transparent Learn CyclePage Removing The Perc Controller Deploying The Perc CardRemoving and Installing the Perc Adapter PCIe slot SAS cable connectors Perc adapter ScrewRemoving and Installing the Perc Mini Monolithic Controller Installing The Perc ControllerSupport For Internal Multiple Controllers Setting Up Redundant Path Support On The Perc H810 AdapterServer Storage Redundant Path Support Configuration With Two EnclosuresPage Installing a driver Driver InstallationClick Continue Popular support tools section, click Drivers and Downloads Select Install from a list or specific location Reboot the system when promptedUpdating The Linux Driver Click on the Hardware tabUpgrading The Kernel Version installed Page Entering The Bios Configuration Utility Bios Configuration UtilityManagement Applications For Perc Cards Dell OpenManage Storage ManagementTo exit the Bios Configuration Utility Ctrl R Exiting The Configuration UtilityMenu Navigation Controls Notation Meaning and Use ExampleNotation Meaning and Use Setting Up Virtual DisksCtrl Mgmt, and Foreign View Mgmt, Ctrl Mgmt, and Foreign ViewSummary Of RAID Levels Parameter DescriptionCreating Virtual Disks Virtual Disk ManagementParameterDescription Select Create New VD and press EnterConverting Physical Disk To RAID Capable For Perc H310 Selecting Virtual Disk ParametersInitializing Virtual Disks Converting Physical Disk To Non-RAID For Perc H310Checking Data Consistency Running a Data Consistency CheckPage Page Managing Preserved Cache Break MirrorChoose Break Mirror and press Enter Select Manage Preserved Cache Managing Dedicated Hot SparesSelect Manage Ded. HS and press Enter Select Clear Config Clearing The ConfigurationDeleting Virtual Disks Deleting Disk GroupsVirtual Disk Management VD Mgmt Bios Configuration Utility Menu OptionsVirtual Disks Physical Disks Security property of the Disk Group Virtual Disks Action Description Virtual Disk ActionsPhysical Disk Actions Physical Disk Management PD MgmtController Management Ctrl Mgmt RebuildController Management Actions Setting LED Blinking Foreign Configuration ViewPhysical Disk Management Removing Global Or Dedicated Hot Spares Creating Global Hot SparesReplacing An Online Physical Disk Stopping Background Initialization Restrictions and LimitationsPerforming a Manual Rebuild Of An Individual Physical Disk Enabling Boot Support For a BIOS-Enabled Controller Enabling Boot SupportEnabling Bios Stop On Error Controller ManagementRestoring Factory Default Settings Uefi RAID Configuration UtilityEntering The Uefi RAID Configuration Utility Disabling Auto ImportConfiguration Options Exiting The Uefi RAID Configuration UtilityDevice Settings menu Controller Management MenuPhysical Disk Management Menu Virtual Disk ManagementEnclosure Management Configuring And Managing CacheCade Virtual Disks CacheCade Virtual Disk CharacteristicsCacheCade Creating CacheCade Virtual Disks CacheCade Virtual Disk ManagementSelect Create CacheCade Virtual Disk and press Enter Automatic Reconfiguration Of CacheCade Virtual Disks Reconfiguring CacheCade Virtual DisksDeleting CacheCade Virtual Disks Manual Resizing Of CacheCade Virtual DisksPage Security Key And RAID Management Security Key Management In The Bios Configuration UtilitySecurity Key Implementation Local Key Management LKMChanging The Security Key Creating a Security KeyCreating Secured Virtual Disks Deleting a Security KeySecuring Pre-Existing Virtual Disks Highlight the Secure Disk Group option and press Enter Secured Foreign Import Errors Troubleshooting Security Key ErrorsInstant Secure Erase Failure To Instant Secure Erase Task On Physical Disks Failure To Delete Security KeyBios Error Messages TroubleshootingDiscovery Error Message Extra Enclosure Error MessagePrevious Configuration Of Disks Removed Error Message Missing Disks In Virtual Disk Error MessageMissing Virtual Disks Error Message Bios Disabled Error Message Dirty Cache Data Error MessageDrive Configuration Changes Error Message Virtual Disks Offline Error Message Adapter At Baseport Not Responding Error MessageVirtual Disks Degraded Error Message Action Cable problems, press any key or Y to continueMemory Or Battery Problem Error Message Virtual Disks Partially Degraded Error MessageFirmware Fault State Error Message Foreign Configuration Found Error MessagePrevious Configuration Cleared Or Missing Error Message Foreign Configuration Not Found In Ctrl R Error MessageInvalid SAS Topology Detected Error Message Multibit ECC Errors Detected Error MessagesBattery Discharged Or Disconnected Error Message Configured Disks Removed Or Not Accessible Error MessageDegraded State Of Virtual Disks General Issues Memory ErrorsPreserved Cache State Perc Card Has Yellow Bang In Device ManagerUnable to Rebuild a Fault Tolerant Virtual Disk Physical Disk IssuesFatal Error Or Data Corruption Reported Physical Disk In Failed StateVirtual Disk Fails During Rebuild Using a Global Hot Spare Multiple Disks Become InaccessibleRebuilding a Failed Physical Disk Virtual diskVirtual Disk Fails Rebuild Using a Dedicated Hot Spare Smart ErrorsPhysical Disk Takes a Long Time To Rebuild Linux Operating System Errors Replace Member ErrorsIssue General disk fails Corrective ErrorInstall a DKMS-enabled driver package Unable To Register Scsi Device Error MessageReboot to the new kernel Driver Does Not Auto-Build Into New KernelActivity LED Status LED Disk Carrier LED IndicatorsSummary Of RAID Levels Appendix RAID DescriptionRAID Terminology Disk StripingSpanned RAID Levels Disk MirroringParity Data 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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