Chapter 4: UEFI BIOS
91
Memory Rank Sparing
options are Enable and Disable.
Note: This item will not be available when memory mirror mode is set to Mirror Mode
1LM or a DCPMM is plugged in.
Correctable Error Threshold
Use this item 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 (Single Device Data Correction) Plus One (Available when Intel Run Sure is
set to Enable)
Select Enable for SDDC Plus one support, which is the enhanced feature to SDDC, will
spare the faulty DRAM device out after an SDDC event has occurred. After the event, the
SDDC+1 ECC mode is activated to protect against any additional memory failure caused
Disable.
ADDDC (Adaptive Double Device Data Correction) Sparing (Available when Intel
Run Sure is set to Enable)
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.
Patrol Scrub
Patrol Scrubbing is a process that allows the CPU to correct correctable memory errors
detected in a memory module and send the corrections to the requestor (the original
source). When this feature is set to Enable, the IO hub will read and write back one cache
line every 16K cycles if there is no delay caused by internal processing. By using this
method, roughly 64 GB of memory behind the IO hub will be scrubbed every day. The
options are Enable and Disable.
Patrol Scrub Interval
Use this item to specify the number of hours (between 0 to 24) required for the system to
complete a full patrol scrubbing. Enter 0 for patrol scrubbing to be performed automatically.
The default setting is 24.
Note: This item is hidden when Patrol Scrub item is set to Disable.
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