Cisco UCS C890 M5, Instruction Manual

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Memory RAS (Reliability_Availability_Serviceability) Configuration
Use this submenu to configure 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 configure 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.
UEFI ARM Mirror
If this feature is set to Enable, mirror mode configuration settings for UEFI-based Address
Range memory will be enabled upon system boot. This 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 and Enable.
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 (Available when supported by the CPUs installed)
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
Disable and Enable.