Dell UCPM-800 manual Troubleshooting, Shared Perc 8 Card Boots Into Safe Mode

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Troubleshooting

To get help with your Dell Shared PowerEdge RAID Controller Shared (PERC) 8 card, you can contact your Dell Technical Service representative or see dell.com/contactdell.

Performance variations between write-back and write- through cache modes

Performance is highly variable across configurations, drive type, applications and IO workloads. The write performance of write-through mode is typically lower than that of write-back mode. Some configurations and workloads exhibit significant performance deltas.

Evaluate your needs for maximum I/O performance (a single Shared PERC 8 configuration) versus maximum data protection (a Fault Tolerant Shared PERC 8 configuration).

Shared PERC 8 Card Boots Into Safe Mode

In the event of some failure conditions encountered at boot, Shared PERC 8 boots with restricted capability in safe mode without user intervention. In such a condition Shared PERC 8 reports all configured disk drives as Foreign to the management application. The Dell Chassis Management Controller (CMC) displays events generated by the Shared PERC 8 card indicating the reason for booting into safe mode. The following table details the conditions and the corresponding event notifications that are reported to the CMC.

Table 2. Conditions and the Corresponding Event Notifications Reported to the CMC

Category	Event Reported To the CMC	Description of the	Corrective Action
		Failure

Pinned	Controller cache pinned	The Shared PERC 8 card	You can restore the
Cache	for missing or offline	preserves dirty cache for	preserved cache to the
	VDs: %s	a virtual disk that	virtual disk once the
		transitioned to offline or	original drives are re-
		was deleted due to	inserted and the foreign
		missing physical disks.	configuration is imported.
SAS	Controller booted to safe	This issue occurs if	Reseat and cable the
Discovery	mode due to critical	expanders are not	expanders.
	errors Critical Error	detected.
	during boot - On-board
	expander FW or mfg image
	is corrupted - reflash
	image

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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 Best Practices For Shared Perc Supported Operating SystemsRelated 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 DisksFastPath Using Physical Disk RoamingVirtual Disk Migration Migrating Virtual Disks If The Target System Is Turned Off Virtual Disk Cache PoliciesMigrating 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 Hot Swapping Physical disk failure detectionShared 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 SupportDeploying The Shared Perc 8 Card Installing a New 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 TroubleshootingDegraded State Of Virtual Disks General IssuesShared 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 FunctionMultiple Disks Become Inaccessible Fatal Error Or Data Corruption ReportedRebuilding a Failed Physical Disk Controller cache issues Virtual Disk Fails During Rebuild Using a Global Hot SparePhysical 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