Acer Altos G530 - Manual (Page 76)

3 System upgrade 66
Altos G530 supports memory sparing function. To provide a more fault
tolerant system, Altos G530 includes special 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 spare DIMM held in reserve. When all the data
has been copied, the reserved DIMM will be put into service and the
failed DIMM will be removed from service. Only one sparing cycle is
supported. If the memory sparing feature is not enabled, then all
DIMMs will be visible in normal address space.
Refer to “Memory Configuration” on page 101 for more information
about configuring the memory spare parameter in the BIOS Setup
Utility.