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.
Contents
38
GigaVUE-FM Hardware Appliance Guide for GFM-HW1-FM010
