Acer Altos R710 - Manual (Page 86)

4 Configuring the system 74
Memory sparing and mirroring configuration cannot be used
simultaneously.
Memory Sparing
To provide a more fault tolerant system, Altos R710 includes
specialized hardware to support fail-over to a spare DIMM device in
the event that a primary DIMM in use exceeds a specified threshold of
runtime errors. One of the DIMMs installed per channel will not be
used, but kept in reserve. In the event of significant failures in a
particular DIMM, it and its corresponding partner in the other channel
(if applicable), will, over time, have its data copied over to the
spareDIMM(s) held in reserve. When all the data has been copied, the
reserve DIMM(s) will be put into service and the failing DIMM will be
removed from service. Only one sparing cycle is supported. If this
feature is not enabled, then all DIMMs will be visible in normal address
space.
Refer to "Memory Configuration Sub-menu Selections" on page 103
for more information about configuring the memory spare or mirror
parameter in the BIOS Setup utility.
Below table lists the suggested memory population for memory
sparing:
Memory Mirroring
The Memory Mirroring feature designates a channel, two DDR2 DIMM
slots, as spare memory and all system memory are sent to both mirrors
by the Intel E7520 MCH chipset. When an uncorrectable error occurs