Dell UCSE-900 manual Physical disk hot swapping, Using replace member and revertible hot spares

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becomes a hot spare with the same properties as the one it is replacing. If the replacement disk does not match the disk protocol and technology, it does not become a hot spare.

For more information on persistent hot spares, see the Dell OpenManage documentation at dell.com/ support/manuals.

Physical disk hot swapping

NOTE: To check if the backplane supports hot swapping, see the Owner’s Manual of your system.

Hot swapping is the manual replacement of a disk while the PERC 9 series cards are online and performing their normal functions. The following requirements must be met before hot swapping a physical disk:

The system backplane or enclosure must support hot swapping for the PERC 9 series cards to support hot swapping.

The replacement disk must be of the same protocol and disk technology. For example, only a SAS hard drive can replace a SAS hard drive and only a SATA SSD can replace a SATA SSD.

Using replace member and revertible hot spares

The Replace Member functionality allows a previously commissioned hot spare to revert to a usable hot spare. When a disk failure occurs within a virtual disk, an assigned hot spare (dedicated or global) is commissioned and begins rebuilding until the virtual disk is optimal. After the failed disk is replaced (in the same slot) and the rebuild to the hot spare is complete, the controller automatically starts to copy data from the commissioned hot spare to the newly-inserted disk. After the data is copied, the new disk is a part of the virtual disk and the hot spare is reverted to being a ready hot spare. This allows hot spares to remain in specific enclosure slots. While the controller is reverting the hot spare, the virtual disk remains optimal.

NOTE: The controller automatically reverts a hot spare only if the failed disk is replaced with a new disk in the same slot. If the new disk is not placed in the same slot, a manual Replace Member operation can be used to revert a previously commissioned hot spare.

NOTE: A Replace Member operation typically causes a temporary impact to disk performance. Once the operation completes, performance returns to normal.

Controller cache preservation

The controller is capable of preserving its cache in the event of a system power outage or improper system shutdown. The PERC 9 Series controller is attached to a Battery Backup Unit (BBU) that provides backup power during system power loss to preserve the controller's cache data.

Cache Preservation With NVC

The Non-Volatile Cache (NVC) allows controller cache data to be stored indefinitely. If the controller has data in the cache memory during a power outage or improper system shutdown, a small amount of power from the battery is used to transfer the cache data to a non-volatile flash storage where it remains until power is restored and the system is booted.

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Contents Dell PowerEdge RAID Controller Perc 9 User’s Guide Page Contents Driver installation Deploying the Perc cardBios Configuration Utility UEFI/HII RAID configuration utility Security key and RAID management100 Appendix RAID description Getting helpFeatures of Perc H330 adapter card OverviewFeatures of Perc H330 mini monolithic card Features of Perc H730 card Features of Perc H730/H730P mini monolithic card Features of Perc H730P adapter card Features of Perc H830 adapter card Supported operating systemsPerc card specifications Perc H330 Perc H730 Perc H730P Perc H830SAS Management applications for Perc cards Comprehensive embedded managementDell OpenManage Storage Management Related documentation Getting started with your Perc card Creating Global Hot Spares Creating Security KeyCreating Global Hot Spares Creating Security Key Creating virtual disks Setting up virtual disks Manage physical disks Creating Global Hot Spares Creating Security Key Page Features Perc 9 personality managementT10 protection information Enabling T10 PISecure firmware update Improved RAID 10 configurationPhysical disk power management 4KB block size disk drivesConfigured spin down delay Types of virtual disk initializationFull initialization Background initialization Consistency checksFast initialization Using disk roaming Configuring FastPath-capable virtual disksDisk roaming FastPathVirtual disk migration Migrating virtual disksVirtual disk write cache policies Virtual disk read cache policiesConditions under which write-back is employed Reconfiguration of virtual disks Or more Yes Removes Redundancy While increasing Capacity Fault tolerance Smart FeatureUsing persistent hot spare slots Patrol ReadPhysical disk failure detection Using replace member and revertible hot spares Physical disk hot swappingController cache preservation Battery Transparent Learn Cycle Non-RAID disks supportSelect OK Deploying the Perc card Removing the Perc 9 adapterBattery cable connector Perc 9 card SAS cables Installing the Perc 9 adapter Removing the Perc 9 mini monolithic controllerReplacing the battery of a H730P mini monolithic card Removing and installing the Perc 9 mini monolithic cardRemoving the battery carrier Installing the Perc 9 mini monolithic controller Removing the batteryRemoving a H730P slim card Replacing the battery of a H730P slim card Removing and installing a H730P slim cardRemoving the battery Installing a H730P slim card Removing the Perc 9 mini blade controllerReplacing the tethered battery of a Perc 9 mini blade card Removing and installing the Perc 9 mini blade controllerRemoving the battery carrier Removing the battery from the battery carrier Installing the battery into the battery carrier Installing the Perc 9 mini blade controller Replacing the battery carrierRemoving the Perc FD33xD Card Replacing the battery of a Perc FD33xD card Removing and installing the Perc FD33xD cardInstalling the Perc FD33xD card Page Driver installation Creating the device driver mediaDownloading drivers from the Dell support website Windows driver installation Linux driver installation Page Bios Configuration Utility Entering the Bios Configuration UtilityExiting the Configuration Utility Menu navigation controls Setting up virtual disks For more information, see Managing dedicated hot sparesParameters description Bios Configuration Utility menu options Virtual disk managementPage Virtual disk actions Physical disk management PD Mgmt Physical disk actionsRebuild Controller management Ctrl MgmtController management actions Foreign configuration view Virtual Disk ManagementCreating virtual disks Selecting virtual disk parameters Initializing virtual disksChecking data consistency Running a data consistency checkPage Break mirror Break mirror in Bios configuration utility Managing preserved cacheManaging dedicated hot spares Deleting virtual disksClearing the configuration Setting LED blinkingPhysical Disk Management Deleting disk groupsCreating 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 Enabling boot support for a BIOS-enabled controllerController Management Enabling Bios stop on error Disabling Bios stop on errorEnabling auto import Disabling auto importRestoring factory default settings UEFI/HII RAID configuration utility Entering the Uefi configuration utilityExiting the Uefi configuration utility Navigating to Dell Perc 9 configuration utilityConfiguration management Creating profile based virtual disks Converting physical disks to RAID capable diskConverting physical disks to non-RAID disk Viewing disk group propertiesManaging foreign configurations on a RAID controller Deleting existing configurations on a RAID controllerRestoring factory settings for the controller Saving controller eventsSwitching the controller to HBA mode Enabling security for the controllerSaving debug log Switching the controller to RAID mode Viewing virtual disk propertiesViewing physical disks associated with a virtual disk Viewing battery properties Hardware components managementViewing physical disk properties Viewing physical disks associated with an enclosure Security key management in the Bios configuration utility Security key and RAID managementSecurity key implementation Local Key Management LKM Creating a security keyChanging the security key Deleting a security key Creating secured virtual disksSecuring pre-existing virtual disks Page Instant secure erase Troubleshooting Bios configuration utility error messagesDiscovery error message Extra enclosure error messagePrevious configuration of disks removed error message Missing virtual disks error messageDirty cache data error message Bios disabled error message Drive Configuration Changes Error MessageAdapter at baseport not responding error message Virtual disks offline error message Virtual disks degraded error messageVirtual disks partially degraded error message Memory or battery problem error message Firmware fault state error messageForeign configuration found error message Foreign configuration not found in ctrl R error messagePrevious configuration cleared or missing error message Invalid SAS topology detected error messageConfigured disks removed or not accessible error message Degraded state of virtual disksMemory errors Security key errorsSecured foreign import errors Preserved Cache StateGeneral Issues Physical disk issuesUnable to rebuild a fault tolerant virtual disk Fatal error or data corruption reportedMultiple disks become inaccessible Physical disk displayed as blockedVirtual disk fails during rebuild using a global hot spare Virtual disk fails rebuild using a dedicated hot spareRebuilding a failed physical disk Physical disk takes a long time to rebuildSmart errors Replace member errorsLinux operating system errors Source disk fails during replace member operationTarget disk fails General disk failsDisk Carrier LED Indicators Uefi error messagesUnable to register Scsi device error message Unhealthy Status of the DriversCorrective Action Appendix RAID description Summary of RAID levelsRAID terminology Disk stripingDisk mirroring Spanned RAID levelsParity data Example of Distributed Parity RAIDLocating your system Service Tag Getting helpContacting Dell Documentation feedback