HP Surestore Disk Array 12h - And FC60 Service Manual page 239

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A controller fault may be due to a failed memory module.
Memory Module Servicing Notes
Memory modules must be serviced by a trained service technician
C
AUTION
ONLY.
Before replacing a failed SIMM or DIMM, remember the following tips:
•
Always use proper precautions against electrostatic discharge before removing and
handling controller modules, SIMMs, and DIMMs.
•
Always use the same type and size of memory module to replace a failed module.
•
The Fault LED on the affected controller module will turn ON if one of its memory
modules fail. This is the same LED used to indicate a controller failure. The controllers
do not contain an LED or other mechanism for identifying individual memory module
failures. The following information should help you determine if the problem is
memory- or controller-related:
•
Remove the failed controller module and replace a failed memory module while the
other controller module is running.
•
If cache mirroring is enabled and one controller module fails, the remaining controller
module will assume operation of the disk array, but write cache will be disabled.
Controller Enclosure Troubleshooting
239