BIOS Initialization Intel® Server System S7000FC4UR
Revision 1.0
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memory configuration. BIOS Setup then displays the selected memory configuration on the next
boot.
14.2.14 Memory Sub-System Errors
This section describes the BIOS and chipset policies used for handling and reporting errors
occurring in the memory sub-system.
The BIOS handles memory errors using a variety of platform-specific policies. Each of these
policies is aimed at providing comprehensive diagnostic support to the system administrator
towards system recovery following the failure.
14.2.14.1 Memory Error Classification
The BIOS classifies memory errors into the following categories:
Memory Controller Fatal and Uncorrectable Errors
Memory Controller Recoverable Errors
Memory Controller Correctable Errors
14.2.14.1.1 Memory Controller Fatal and Uncorrectable Errors
This category includes all memory related errors classified as Fatal or Uncorrectable in
the chipset datasheet.
Both of these categories are handled by the BIOS using an NMI to halt the system and
prevent silent data corruption and/or erratic system behavior.
This category also includes persistent Memory ECC Uncorrectable Errors (UE). The
chipset ECC engine can detect these errors but cannot correct them.
14.2.14.1.2 Memory Controller Recoverable Errors
This category includes all memory related errors classified as Recoverable in the chipset
datasheet.
This category includes several errors that can potentially be successfully retried.
If the retry is successful, then the system continues operation.
If the retry is unsuccessful, then the chipset reports a fatal or uncorrectable error.
14.2.14.1.3 Memory Controller Correctable Errors:
This category includes all memory related errors classified as Correctable in the chipset
datasheet.
BIOS does not respond to any errors in this category except for Memory ECC
Correctable Errors (CE) which are errors involving only single-bit data corruption.
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