Memory Operating
Mode
Description
Single Rank Spare Mode
Single Rank Spare Mode allocates one rank per
channel as a spare. If excessive correctable errors
occur in a rank or channel, while the operating
system is running, they are moved to the spare area
to prevent errors from causing an uncorrectable
failure.
Requires two or more ranks to be populated in each
channel.
Multi Rank Spare Mode
Multi Rank Spare Mode allocates two ranks per
channel as a spare. If excessive correctable errors
occur in a rank or channel, while the operating
system is running, they are moved to the spare area
to prevent errors from causing an uncorrectable
failure.
Requires three or more ranks to be populated in each
channel.
With single rank memory sparing enabled, the
system memory available to the operating system is
reduced by one rank per channel.
For example, in a dual-processor configuration with
sixteen 16 GB dual-rank memory modules, the
available system memory: 16 GB x 16(memory
modules) - 8GB(1 rank sparing/channel) x
12(channel) = 256 GB - 96 GB = 160 GB. For multi rank
sparing, in a dual-processor configuration with
sixteen 64 GB quad-rank memory modules, the
available system memory:
64 GB x 16(memory modules) - 32 GB(2 rank
sparing/channel) x 12 (channel) = 1024 GB - 384 GB =
640 GB.
NOTE: To use memory sparing, this feature must be
enabled in the BIOS menu of System Setup.
NOTE: Memory sparing does not offer protection
against a multi-bit uncorrectable error.
Dell Fault Resilient Mode
The Dell Fault Resilient Mode if enabled, the BIOS
creates an area of memory that is fault resilient. This
mode can be used by an OS that supports the feature
to load critical applications or enables the OS kernel
to maximize system availability.
This feature is only supported in Gold and Platinum
Intel processors.
Memory configuration has to be of same size DIMM,
speed, and rank.
Installing and Removing System Components
System Memory
51
GigaVUE-FM Hardware Appliance Guide for GFM-HW1-FM010 and GFM-HW1-FM001-HW
