Supermicro X10DBT User Manual page 91

Chapter 4: AMI BIOS
Demand Scrub
Demand Scrubbing is a process that allows the CPU to correct correctable memory
errors found on a memory module. When the CPU or I/O issues a demand-read
command, and the read data from memory turns out to be a correctable error, the
error is corrected and sent to the requestor (the original source). Memory is updated
as well. Select Enable to use Demand Scrubbing for ECC memory correction. The
options are Enable and Disable.
Device Tagging
Select Enable to support device tagging. The options are Disable and Enable.
Memory Power Management
Select Enabled for memory power management support. The options are Disabled
and Enabled.
Memory Rank Mask
Select Enabled to support memory rank in the memory controller. The options are
Disabled and Enabled.
A7 Mode
Select Enabled to support A7 (Addressing) Mode to improve memory performance.
The options are Disable and Enable.
DDDC Support
Select Enabled to enable Double-Device Data Correction (DDDC) support for the
error-correction codes to correct memory errors caused by two failed DRAM devices.
The options are Disable and Enable.
DDDC Wirekill (Wire-Kill)
Select Enabled for Double-Device Data Correction (DDDC) Wire-kill support which
will disable the wire connection between two DRAM devices when they fail. The
options are Disable and Enable.
DDDC Wirekill (Wire-Kill) Threshold
Use this feature to set the DDDC Wirekill threshold. When the memory errors reach
the threshold,wire-connections between the failed DRAM modules will be discon-
nected. The default setting is 2.
Apply Memory RAS (Reliability-Availability-Serviceability Policy Globally
When this item is set to Enabled, the configuration settings for memory sparing,
Mirroring, DDDC, Device-Tagging will be applied to all nodes in the system. The
options are Disable and Enable.
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