Intel® Server Board SE7520JR2

Functional Architecture

status of the extended memory test is displayed on the console. The status of base and extended memory tests are also displayed on an LCD control panel if present.

The extended memory test is configured using the BIOS Setup Utility. The coverage of the test can be configured to one of the following:

•Test every location (Extensive)

•Test one interleave width per kilo-byte of memory (Sparse)

•Test one interleave width per mega-byte of memory (Quick).

The “interleave width” of a memory subsystem is dependent on the chipset configuration. By default, both the base and extended memory tests are configured to the Disabled setting. The extended memory test can be aborted by pressing the <Space> key during the test.

3.3.5Memory Monitoring

Both the baseboard management controller and BIOS provide support for memory inventory, memory failure LEDs, and failure/state transition events. Memory monitoring features are supported differently depending on which level of server management is used. The following table shows how each feature is supported by management level.

Table 6: Memory Monitoring Support by Server Management Level

Memory Feature

On-board

Professional

Advanced

Inventory

No

Yes

Yes

 

 

 

 

Correctable Error Reporting

No

Yes

Yes

 

 

 

 

Uncorrectable Error Reporting

Yes

Yes

Yes

 

 

 

 

With either Professional or Advanced IMMs installed, the Sahalee BMC maintains one sensor per DIMM. The sensor is IPMI type 21h, Slot/Connector. The Sahalee BMC directly detects the presence or absence of each DIMM and records this in offset 2 of these sensors.

DIMM failure can be detected at BIOS POST or during system operation. POST detected DIMM failures or mis-configuration (incompatible DIMM sizes/speeds/etc) cause the BIOS to disable the failed/affected DIMMs and generate IPMI SEL events, which are sent to the BMC in use.

In addition, using Professional or Advanced IMMs, the BIOS communicates this failure to the Sahalee BMC so that it can be incorporated in the BMC’s DIMM sensor state. DIMM presence and failure states are stored persistently by the Sahalee BMC.

In all management levels, the BIOS is responsible for DIMM FRU LED management and illuminates the LEDs associated with failed or disabled DIMMs.

Correctable memory errors are non-critical errors that do not cause the system to fail. They are detected by the BIOS and are logged as IPMI SEL events when either the Professional or Advanced IMMs are installed. Logging is throttled by error frequency. If more than a certain number of correctable errors occur in an hour, logging is turned off.

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C78844-002