Supermicro SuperStorage SSG-6049SP-DE1CR60 User Manual page 86

SuperStorage Server SSG-6049SP-DE1CR60/90 User's Manual
Mirror Mode
Use this feature to configure the mirror mode settings for all 1LM/2LM memory modules
installed in the system which will create a duplicate copy of data stored in the memory
to increase memory security, but it will reduce the memory capacity into half. The op-
tions are Disable, Mirror Mode 1LM, and Mirror Mode 2LM.
Memory Rank Sparing
Select Enable to support memory-rank sparing to optimize 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:
Correctable Error Threshold
Use this feature to enter the threshold value for correctable memory errors. The default
setting is 512.
SDDC
SDDC (Single Device Data Correction) checks and corrects single-bit or multiple-bit
(4-bit max.) memory faults that affect an entire single x4 DRAM device. The options
are Disable and Enable.
ADDDC Sparing
Select Enable for ADDDC (Adaptive Double Device Data Correction) 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 us-
ing 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 (Available when Patrol Scrub is set to Enable)
Use this item to specify the number of hours (between 0 to 24) required for the sys-
tem to complete a full patrol scrubbing. Enter 0 for patrol scrubbing to be performed
automatically. The default setting is 24.
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