Chapter 6: UEFI BIOS
85
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
. (
Note
: the default setting for the X11DPH-Tq is
Enable
.)
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 mode
will only start to work for ADDDC after a faulty DRAM module is spared. The options are
Enable and
Disable
. (
Note
: the default setting for the X11DPH-Tq is
Enable
.)
ADDDC Error Injection (Available for the X11DPH-Tq board only)
Error injection is a technique used to enhance memory error recovery. Select Enable to
propagate error injection equally between the primary device and the buddy device (with
half of the cache line to each device). Please be sure to enable this feature when ADDDC
Sparing is set to Enable. The options are Enable and Disable. (
Note
: the default setting
for the X11DPH-Tq is
Enable
.)
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 item 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.
