Dell UCPM-800 manual Virtual Disk Cache Policies

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Does not support migration from any other PERC cards such as PERC H310, H700, H710, H800, and H810.

Supports migration of virtual disks from the Single Shared PERC 8 card configuration to the Fault Tolerant Shared PERC 8 card configuration, but does not support migration from a newer firmware version to an older firmware version system.

Supports migration of virtual disks from another system's Shared PERC 8 controller when the target system is either turned on or off

NOTE: When a controller detects a physical disk with an existing configuration, it flags the physical disk as a foreign disk and generates an alert indicating that a foreign disk was detected.

Migrating Virtual Disks If The Target System Is Turned Off

1.If installed, remove the front bezel (optional) from the PowerEdge VRTX enclosure.

2.Power down the server module using the operating system commands or the CMC, and ensure that the server module's power is off.

3.Turn off the chassis using CMC.

NOTE: For information about the chassis shutdown, refer to the Dell Chassis Management Controller for Dell PowerEdge VRTX User’s Guide at dell.com/esmmanuals.

4.Move the appropriate physical disks from the source system to the target system with a similar Shared PERC 8 controller.

5.Turn on the target system.

The system discovers and automatically imports the detected foreign configuration.

Migrating Virtual Disks If The Target System Is Turned On

1.Turn off the source system.

2.Move the appropriate physical disks from the source system to the target system with a similar Shared PERC 8 card.

3.Access the Dell Chassis Management Controller (CMC) to import and clear the foreign configuration.

NOTE: For more information on importing or clearing the foreign configuration, see the Dell Chassis Management Controller for Dell PowerEdge VRTX User’s Guide at dell.com/ poweredgemanuals.

NOTE: If write cache is enabled for these virtual disks, ensure that all cache is flushed to the hard drives on the source system before migrating them. This can be accomplished by stopping all applications, powering down the blades, and waiting 30 seconds before powering down the chassis.

Virtual Disk Cache Policies

The following Virtual Disk Cache policies are supported on Shared PERC 8:

Virtual disk write cache policies

Virtual disk read cache policies

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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 Supported Operating Systems Best Practices For Shared PercRelated Documentation 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 DisksUsing Physical Disk Roaming FastPathVirtual Disk Migration Virtual Disk Cache Policies Migrating Virtual Disks If The Target System Is Turned OffMigrating Virtual Disks If The Target System Is Turned On 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 FeaturePhysical disk failure detection Physical Disk Hot SwappingShared Perc 8 Card Cache Preservation Controller Failover Feature Battery Transparent Learn CycleMultipath support in Linux Configuring Multipath Support In WindowsConfiguring Multipath Support In VMWare Multipath SupportInstalling a New Shared Perc 8 Card Deploying The Shared Perc 8 CardReplacing a 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 TroubleshootingGeneral Issues Degraded State Of Virtual DisksShared Perc 8 Card Not Seen In Device Manager Physical Disk In Failed State Physical disk issuesUnable to rebuild a fault tolerant virtual disk Shared Perc 8 Cards Fail To FunctionFatal Error Or Data Corruption Reported Multiple Disks Become InaccessibleRebuilding a Failed Physical Disk Virtual Disk Fails During Rebuild Using a Global Hot Spare Controller cache issuesPhysical disk takes a long time to rebuild Smart Errors General Disk Fails Auto Replacement Member ErrorsSource Disk Fails Target Disk FailsHard-Drive Indicators Hard-Drive Indicator PatternsDocumentation feedback Getting help