Dell UCPM-800 Virtual Disk Fails During Rebuild Using a Global Hot Spare, Controller cache issues

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must make sure a physical disk with enough storage in the subsystem is set as a hot spare for rebuilding the physical disk.

Virtual Disk Fails During Rebuild Using A Global Hot Spare

Issue:

A virtual disk fails during rebuild while using a global hot spare. The global hot

 

spare reverts to Hotspare state and the virtual disk is in Failed state.

Corrective

Check whether the original virtual disk has failed or has been removed.

Action:

 

Virtual Disk Fails During Rebuild Using A Dedicated Hot Spare

Issue:A virtual disk fails during rebuild while using a dedicated hot spare. The dedicated hot spare goes to Ready state and the virtual disk goes to Failed state.

Description: Check whether the original virtual disk has failed or has been removed.

Physical disk takes a long time to rebuild

Issue:A physical disk is taking longer than expected to rebuild.

Description: A physical disk takes longer to rebuild when under high stress. For example, there is one rebuild I/O operation for every five host I/O operations. You cannot add a second virtual disk to a disk group while the virtual disk in that disk group is undergoing a rebuild. The firmware does not allow you to create a virtual disk using the free space available in a disk group if a physical disk in a virtual disk group is undergoing a rebuild operation.

Controller cache issues

For certain conditions virtual drives will be either not configured to write-back caching or if configured, it will transition to write-through caching. The status of write-back caching can be viewed through CMC storage logs.

The following table details the conditions and the corrective actions.

Table 3. Conditions and the corrective actions

Conditions

Actions

 

 

During the VRTX power on with no failing

There is no intervention required.

conditions, the virtual drive temporarily transitions

 

to write-through as part of the Shared PERC 8

 

firmware initialization. After the system power on,

 

the virtual drive transitions back to write-back.

 

During VRTX power on or reset, unresolved pinned cache is present.

Perform the following:

•Insert the drives that caused the virtual drive to go offline, that resulted in the cache being pinned to recover the virtual drive.

OR

•Clear the pinned cache through CMC.

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Contents User’s Guide Page Contents Deploying The Shared Perc 8 Card Driver InstallationGetting help About The Shared Perc 8 Card Configurations of the Shared Perc 8 cardStorage Subsystem Compatibility Matrix at dell.com Specifications of a Shared Perc 8 cardPage Related Documentation Supported Operating SystemsBest Practices For Shared Perc Contacting Dell Locating your system Service TagDocumentation Feedback Virtual Disk Initialization Shared Perc 8 Card FeaturesPhysical Disk Power Management Consistency ChecksFast Initialization Of Virtual Disks Physical Disk RoamingBackground Initialization Of Virtual Disks Full Initialization Of Virtual DisksVirtual Disk Migration Using Physical Disk RoamingFastPath Migrating Virtual Disks If The Target System Is Turned On Virtual Disk Cache PoliciesMigrating Virtual Disks If The Target System Is Turned Off Write-through Virtual Disk Write Cache PoliciesWrite-Back Conditions Under Which Write-Back Is EmployedVirtual Disk Read Cache Policies Fault TolerancePhysical Disk Write Cache Policy Conditions under which write-through is employedPatrol Read Smart FeatureShared Perc 8 Card Cache Preservation Physical disk failure detectionPhysical Disk Hot Swapping Controller Failover Feature Battery Transparent Learn CycleMultipath support in Linux Configuring Multipath Support In WindowsConfiguring Multipath Support In VMWare Multipath SupportReplacing a Shared Perc 8 Card Installing a New Shared Perc 8 CardDeploying The Shared Perc 8 Card Removing The Shared Perc 8 Card Prerequisites For Removing The Shared Perc 8 CardRemoving and Installing the Shared Perc 8 Card Post-Installation Tasks For Shared Perc 8 Card Installing The Shared Perc 8 CardUpdating firmware Firmware installation or updateDriver Installation Installing Or Updating Windows Drivers For Shared Perc Installing Or Updating VMware Drivers For Shared Perc Installing Or Updating Linux Drivers For Shared PercManagement Applications For Shared Perc 8 Card Shared Perc 8 Card Boots Into Safe Mode TroubleshootingShared Perc 8 Card Not Seen In Device Manager General IssuesDegraded State Of Virtual Disks Physical Disk In Failed State Physical disk issuesUnable to rebuild a fault tolerant virtual disk Shared Perc 8 Cards Fail To FunctionRebuilding a Failed Physical Disk Fatal Error Or Data Corruption ReportedMultiple Disks Become Inaccessible Physical disk takes a long time to rebuild Virtual Disk Fails During Rebuild Using a Global Hot SpareController cache issues Smart Errors General Disk Fails Auto Replacement Member ErrorsSource Disk Fails Target Disk FailsHard-Drive Indicators Hard-Drive Indicator PatternsDocumentation feedback Getting help
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