Hardware Installations and Upgrades
104 Intel
®
Server Board S2600CP Intel
®
Server System P4000CP Family Service Guide
4. Select Memory RAS Configuration
Option Values: Maximum Performance
Mirroring
Rank Sparing
Lockstep
Help Text:
Allows the user to select the memory RAS Configuration to be applied for the next boot.
Comments: Available modes depend on the current memory population. Modes
which are not listed as “possible” should not be available as choices. If the only valid choice is
“Maximum Performance”, then this option should be grayed out and unavailable.
Maximum Performance
– (default) no RAS, but best memory utilization since full
amount of memory is available, operating in Independent Channel Mode.
Mirroring
- most reliability by using half of memory as a mirror image, can survive an
Uncorrectable ECC Error.
Rank Sparing
– offers reliability by reserving spare ranks to replace failing ranks which
are generating excessive Correctable ECC Errors.
Lockstep
– allows SDDC capability with x8 DIMMs installed. No memory size impact,
but does have a performance and power penalty.
/
NOTE
Since only RAS Modes which are listed as “possible” are available for selection, it is not
possible to select a RAS Mode without first installing an appropriate DIMM configuration.
Back to [Memory RAS and Performance Configuration Screen] — [Memory Configuration
Screen] — [Advanced Screen]
5. NUMA Optimized
Option Values: Enabled
Disabled
Help Text:
If enabled, BIOS includes ACPI tables that are required for NUMA-aware Operating
Systems.
Comments: This option is only present for boards which have two or more processor
sockets. When a multi-socket board has only a single processor installed, this option is grayed out
and set as Disabled.
When enabled, the SRAT and SLIT ACPI tables are provided that show the locality of systems
resources, especially memory, which allows a “NUMA Aware” OS to optimize which processor
threads are used by processes which can benefit by having the best access to those resources.
Back to [Memory RAS and Performance Configuration Screen] — [Memory Configuration
Screen] — [Advanced Screen]
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