DELL MD3220 사용자 설명서

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Troubleshooting: Your Array
Invalid Storage Array
The RAID controller module is supported only in a Dell-supported storage 
array. Upon installation in the storage array, the controller performs a set of 
validation checks. The array status LED is lit with a steady amber color while 
the RAID controller module completes these initial tests and the controllers 
are booted successfully. If the RAID controller module detects a non-Dell 
supported storage array, the controller aborts startup. The RAID controller 
module does not generate any events to alert you in the event of an invalid 
array, but the array status LED is lit with a flashing amber color to indicate a 
fault state.
For full details on the LEDs and their interpretation, see "Back Panel Features 
ECC Errors
RAID controller firmware can detect ECC errors and can recover from a 
single-bit ECC error whether the RAID controller module is in a redundant 
or nonredundant configuration. A storage array with redundant controllers 
can recover from multi-bit ECC errors as well because the peer RAID 
controller module can take over, if necessary.
The RAID controller module failsover if it experiences up to 10 single-bit 
errors, or up to three multi-bit errors. 
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
book.book  Page 250  Monday, June 21, 2010  11:00 AM