Dell POWERVAULT MD3600F User Manual

Page 307

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Troubleshooting: Your Array

307

PCI Errors

The storage array firmware can detect and only recover from PCI errors when

the RAID controller modules are configured for redundancy. If a virtual disk

uses cache mirroring, it fails over to its peer RAID controller module, which

initiates a flush of the dirty cache.

Critical Conditions

The storage array generates a critical event if the RAID controller module

detects a critical condition that could cause immediate failure of the array

and/or loss of data. The storage array is in a critical condition if one of the

following occurs:

• More than one fan has failed
• Any backplane temperature sensors in the critical range
• Backplane/power supply failure
• Two or more temperature sensors are unreadable
• Failure to detect or unable to communicate with peer port

NOTE:

If both RAID controller modules fail simultaneously, the enclosure cannot

issue critical or noncritical event alarms for any enclosure component.

When the enclosure is under critical condition, its enclosure status LED

blinks amber.

Noncritical Conditions

A noncritical condition is an event or status that does not cause immediate

failure, but must be corrected to ensure continued reliability of the storage

array. Examples of noncritical events include the following:

• One power supply has failed
• One cooling fan has failed
• One RAID controller module in a redundant configuration has failed
• A battery has failed or is removed
• A physical disk in a redundant virtual disk has failed

When the enclosure is under noncritical condition, its enclosure status LED

blinks amber.

book.book Page 307 Tuesday, June 18, 2013 3:03 PM

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