Supermicro X11DPU-XLL User Manual page 81

Memory RAS (Reliability_Availability_Serviceability) Confi guration
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Use this submenu to confi gure the following Memory RAS settings.
Static Virtual Lockstep Mode
Select Enable to support Static Virtual Lockstep mode to enhance memory performance.
The options are Enable and Disable.
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 set to Mirror Mode
1LM or an AEP device is plugged in.
Correctable Error Threshold
Use this feature to enter the threshold value for correctable memory errors. The default
setting is 512.
Intel Run Sure
Select Enable to use Intel Run Sure Technology which will enhance critical data protection
and increase system uptime and resiliency. The options are Enable and Disable.
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 (Available when Intel
Run Sure is set to Disable)
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
mode will only start to work for ADDDC after a faulty DRAM module is spared. The options
are Enable and Disable.
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Chapter 4: UEFI BIOS