Intel S2600IP Service Guide - Page 103

Maximum Performance, Mirroring, Rank Sparing, Lockstep

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BIOS Setup Utilities Option Values: Yes No Help Text: Comments: Information only. Displays whether the current DIMM configuration is capable of Rank Sparing. For Rank Sparing to be possible, DIMM configurations on all channels must be capable of supporting Rank Sparing. Note: The Correctable Error Threshold value is also the Sparing Fail Over threshold value. Threshold values of "All" or "None" are not valid for Rank Sparing. If the Correctable Error Threshold is set to either of those values, Rank Spring will not be possible. 3. Memory Lockstep Possible Option Values: Yes No Help Text: Comments: Information only. Displays whether the current DIMM configuration is capable of Memory Lockstep. For Memory Lockstep to be possible, DIMM configurations on all paired channels must be identical between the channel pair. 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. Intel® Server System R2000IP Service Guide 91

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BIOS Setup Utilities
Intel
®
Server System R2000IP Service Guide
91
Option Values:
Yes
No
Help Text:
<None>
Comments:
Information only.
Displays whether the current DIMM configuration is
capable of Rank Sparing. For Rank Sparing to be possible, DIMM configurations on all channels
must be capable of supporting Rank Sparing.
Note
: The Correctable Error Threshold value is also the Sparing Fail Over threshold value.
Threshold values of “All” or “None” are not valid for Rank Spar
ing. If the Correctable Error
Threshold is set to either of those values, Rank Spring will not be possible.
3.
Memory Lockstep Possible
Option Values:
Yes
No
Help Text:
<None>
Comments:
Information only.
Displays whether the current DIMM configuration is
capable of Memory Lockstep. For Memory Lockstep to be possible, DIMM configurations on all
paired channels must be identical between the channel pair.
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.