NEC Express5800/T120h User Manual page 78

Chapter 2 Preparations
(1)
Memory Mirroring Function
Memory Mirroring Function is a function to generate redundancy by writing the same data into DIMM group
(mirror set) composed of three channels under the same memory controller (channel 1, channel 2 and channel
3 or channel 4, channel 5 and channel 6).
Ex: Configuration with 2 CPUs
78
Tips
When Memory Mirroring Function is effective and "Memory Mirroring Mode" is set
to "Full Mirroring," total 50 % of available memory can be used from the operating
system.
Express5800/T120h User's Guide
1. Installing Internal Optional Devices