Dell PowerEdge RAID Controller 12 User’s Guide PERC H965i Adapter, PERC H965i Front, PERC H965i MX, and PERC H965e Adapter

Memory errors can corrupt cached data, so the controllers are designed to detect and attempt to recover from the memory errors. Single-bit memory errors can be handled by the controller and do not disrupt normal operation. A notification is sent if the number of single-bit errors exceeds a threshold value.

Multi-bit errors are more serious because the effected memory data cannot be automatically recovered. The following are the actions that occur in the case of multi-bit errors:

• When a multi-bit error is detected, the controller stops responding and becomes inoperative. You must restart the controller.
• If a multi-bit error occurs while accessing data in the cache when the controller is started with dirty cache, the controller discards the cache contents. The controller generates a Warning message to the system console to indicate that the cache was discarded, and then generates an event.
• In all cases, the controller logs an event to the controller’s internal event log and a message is displayed during POST indicating that a multi-bit error has occurred.