Supermicro X11DPG-OT-CPU User Manual page 79

Enable ADR
Select Enable for ADR (Automatic Diagnostic Repository) support to enhance memory
performance. The options are Enable and Disable.

Memory Topology
This item displays the information of onboard memory modules as detected by the
BIOS.
•
P1DIMMA1/P1DIMMA2; P1DIMMB1/P1DIMMB2; P1DIMMC1/ P1 DIMMC2, P1DIMMD1/
P1DIMMD2; P1DIMME1/P1DIMME2; P1DIMMF1/P1DIMMF2
•
P2DIMMA1/P2DIMMA2; P2DIMMB1/P2DIMMB2; P1DIMMC1/ P2DIMMC2, P2DIMMD1/
P1DIMMD2; P2DIMME1/P2DIMME2; P2DIMMF1/P2DIMMF2

Memory RAS (Reliability_Availability_Serviceability) Confi guration
Use this submenu to confi gure the following Memory RAS settings.
Mirror Mode
Use this feature to confi gure the mirror mode settings for all 1LM/2LM memory modules
installed in the system which will create a duplicate copy of data stored in the memory to
increase memory security, but it will reduce the memory capacity into half. The options are
Disable, Mirror Mode 1LM, and Mirror Mode 2LM.
Memory Rank Sparing
Select Enable to support memory-rank sparing to optimize memory performance. The
options are Enable and Disable.
Note: This item will not be available when memory mirror mode is enabled.
Correctable Error Threshold
Use this item to enter the threshold value for correctable memory errors. The default setting
is 10.
SDDC Plus One
Select Enable for SDDC (Single Device Data Correction) Plus One support, which will
activate memory ECC mode for memory error checking and correction. It will also protect
against memory failures caused by 'single-bit' errors in the same memory rank. The options
are Enable and Disable.
ADDDC (Adaptive Double Device Data Correction) Sparing
Select Enable for Adaptive Double Device Data Correction (ADDDC) support, which will
not only provide memory error checking and correction but will also prevent the system
from issuing a performance penalty before a device fails. Please note that virtual lockstep
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Chapter 4: BIOS