Supermicro X13SEED-F User Manual page 79

Chapter 4: UEFI BIOS
ADDDC Sparing (Available when populating 1Rx4, 2Rx4, and 4Rx4 DIMM)
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. Note that virtual lockstep
mode will only start to work for ADDDC after a faulty DRAM module is spared. The
options are Disabled and Enabled.
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 Disabled and Enable at End of POST. (POST: Power_On Self Test)
DDR PPR Type
Post Package Repair (PPR) is a new feature available for the DDR4/DDR5 technology.
PPR provides additional spare capacity within a DDR4/DDR5 DRAM module that is
used to replace faulty cell areas detected during system boot. PPR offers two types
of memory repairs. Soft Post Package Repair (sPPR) provides a quick, temporary fix
on a raw element in a bank group of a DDR4/DDR5 DRAM device, while hard Post
Package Repair (hPPR) will take a longer time to provide a permanent repair on a raw
element. The options are PPR Disabled, Hard PPR, and Soft PPR.
Enhanced PPR
Use this feature to set advanced memory test. Select Enable to always execute on
each boot. Select Once to execute only one time. The options are Disabled, Enabled,
and Once.
Memory PFA Support (Available when the DCMS key is activated)
Select Enabled to enable memory Predictive Failure Analysis (PFA) support. PFA can
be used to avoid uncorrectable faults in the same memory page. The options are
Disabled and Enabled.
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