Chapter 6: UEFI BIOS
85
Mirror Mode
Use this feature to select the mirror mode.
The options are
Disable
, Mirror Mode 1LM,
and Mirror Mode 2LM. If this feature is set to Mirror Mode 1LM or Mirror Mode 2LM,
the available memory capacity will be reduced by 50 percent.
UEFI ARM Mirror
Select Enable to support the UEFI-based address range mirroring with setup option.
The options are
Disable
and Enable.
Memory Rank Sparing
Select Enable to enable memory-sparing support for memory ranks to improve memory
performance. The options are
Disable
and Enable.
*If the feature, Memory Rank Sparing, is set to Enable, the following features will
become available for user's configuration
:
Multi Rank Sparing
Use this feature to set the multiple rank sparing number. The default setting and the
maximum is two ranks per channel. The options are One Rank and
Two Rank
.
Correctable Error Threshold
Use this feature to enter the threshold value for correctable memory errors. The default
setting is
10
.
SDDC Plus One
Single Device Data Correction (SDDC) allows data to be reconstructed when one of
the memory devices fails on a DIMM. Use this feature to enable the SDDC support.
The options are
Disable
and Enable.
ADDDC Sparing
Adaptive Double Device Data Correction (ADDDC) Sparing detects the predetermined
threshold for correctable errors, copying the contents of the failing DIMM to spare
memory. The failing DIMM or memory rank will then be disabled.
The options are
Dis-
able
and Enable.
Patrol Scrub
Patrol Scrubbing is a process that allows the CPU to correct correctable memory errors
detected on a memory module and send the correction to the requestor (the original
source). When this feature is set to Enable, read-and-write will be performed every
16K cycles per cache line if there is no delay caused by internal processing. The op-
tions are Disable and
Enable
.
