Patrol Read, Redundant Path Support For Perc H810 Only

Dell H310, H710P manual Patrol Read, Redundant Path Support For Perc H810 Only

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of a virtual disk. The target disk needs to be a hot spare that qualifies as a rebuild disk. The physical disk with the SMART error is marked as failed only after the successful completion of the Replace Member. This avoids putting the array in degraded status.

If an automatic Replace Member occurs using a source disk that was originally a hot spare (that was used in a rebuild), and a new disk added for the Replace Member operation as the target disk, the hot spare reverts to the hot spare state after a successful Replace Member operation.

NOTE: To enable the automatic Replace Member, use the Dell OpenManage storage management application. For more information on automatic Replace Member, see the topic Dell OpenManage Storage Management. For information on manual Replace Member, see the topic Replacing An Online Physical Disk.

Patrol Read

The Patrol Read feature is designed as a preventative measure to ensure physical disk health and data integrity. Patrol Read scans for and resolves potential problems on configured physical disks. The Dell OpenManage storage management application can be used to start Patrol Read and change its behavior.

The following is an overview of Patrol Read behavior:

•Patrol Read runs on all disks on the controller that are configured as part of a virtual disk, including hot spares.

•Patrol Read does not run on physical disks that are not part of a virtual disk or are in Ready state.

•Patrol Read adjusts the amount of controller resources dedicated to Patrol Read operations based on outstanding disk I/O. For example, if the system is busy processing I/O operation, then Patrol Read uses fewer resources to allow the I/O to take a higher priority.

•Patrol Read does not run on any disks involved in any of the following operations:

–Rebuild

–Replace Member

–Full or Background Initialization

–CC

–RLM or OCE

NOTE: By default, Patrol Read automatically runs every seven days on configured SAS and SATA hard drives. Patrol Read is not necessary on SSD and is disabled by default.

For more information on Patrol Read, see the Dell OpenManage documentation at dell.com/support/manuals.

Redundant Path Support (For PERC H810 Only)

The PERC H810 adapter can detect and use redundant paths to disks contained in enclosures. This provides the ability to connect two SAS cables between a controller and an enclosure for path redundancy. The controller is able to tolerate the failure of a cable or Enclosure Management Module (EMM) by utilizing the remaining path.

When redundant paths exist, the controller automatically balances I/O load through both paths to each disk. Load balancing increases throughput to virtual disks in storage enclosures and is automatically turned on when redundant paths are detected. The ability to load balance I/O can be disabled using the Dell OpenManage storage management application.

To set up your hardware to support redundant paths, see the topic Setting Up Redundant Path Support On The PERC H810 Adapter.

NOTE: This support for redundant paths refers to path-redundancy only and not to controller-redundancy.

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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 Security Key Management In The Bios Configuration Utility TroubleshootingSecurity Key And RAID Management Multiple Disks Become Inaccessible Source Disk Fails During Replace Member OperationAppendix RAID Description Disk Mirroring Overview Specification H310 H710 H710PSupported Operating Systems Specification H310 H710 H710P H810Getting Help Spans per Disk GroupContacting Dell Related DocumentationDocumentation 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 Write Virtual Disk Write Cache Policies Write-Back And Write-Through Conditions 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 Driver Installation Installing a driverClick 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 Break Mirror Managing Preserved CacheChoose Break Mirror and press Enter Managing Dedicated Hot Spares Select Manage Preserved CacheSelect Manage Ded. HS and press Enter Select Clear Config Clearing The ConfigurationDeleting Virtual Disks Deleting Disk GroupsBios Configuration Utility Menu Options Virtual Disk Management VD MgmtVirtual Disks Physical Disks Security property of the Disk Group Virtual Disks Action Description Virtual Disk ActionsPhysical Disk Actions Physical Disk Management PD MgmtRebuild Controller Management Ctrl MgmtController Management Actions Foreign Configuration View Setting LED BlinkingPhysical Disk Management Creating Global Hot Spares Removing Global Or Dedicated Hot SparesReplacing An Online Physical Disk Restrictions and Limitations Stopping Background InitializationPerforming 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 MenuVirtual Disk Management Physical Disk Management MenuEnclosure Management CacheCade Virtual Disk Characteristics Configuring And Managing CacheCade Virtual DisksCacheCade CacheCade Virtual Disk Management Creating CacheCade Virtual DisksSelect 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 KeyDeleting a Security Key Creating Secured Virtual DisksSecuring Pre-Existing Virtual Disks Highlight the Secure Disk Group option and press Enter Troubleshooting Security Key Errors Secured Foreign Import 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 MessageMissing Disks In Virtual Disk Error Message Previous Configuration Of Disks Removed Error MessageMissing Virtual Disks Error Message Dirty Cache Data Error Message Bios Disabled 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 MessagesConfigured Disks Removed Or Not Accessible Error Message Battery Discharged Or Disconnected 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 diskSmart Errors Virtual Disk Fails Rebuild Using a Dedicated Hot SparePhysical 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 StripingDisk Mirroring Spanned RAID LevelsParity Data Example of Distributed Parity RAID

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Dell H310, H710P manual Patrol Read, Redundant Path Support For Perc H810 Only

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