User Guide176www.nec-computers.comMemory MirroringThe memory mirroring feature writes the same data into two groups of DIMMscorresponding with each other between memory branches (mirror set) to provide dataredundancy.Figure 91: Memory MirroringA: MotherboardB: Memory ControllerC: Branch #0D: Branch #1E: Mirroring PairsNote: The operating system only recognizes half of the totalphysical capacity.The memory mirroring feature can be used under the following conditions:■ Install memory modules on four memory sockets configuring a mirror set.■ All the installed memory modules should have the same capacity.■ Run SETUP, change the parameters appropriately in the [Mirror] menu selected asshown below, save the settings and exit from SETUP.[Advanced], [Memory Configuration], [Memory RAS Feature], [Mirror]■ Install memory modules in the following order:Groups 1 and 2, Groups 3 and 4, Groups 5 and 6The following mirroring cannot be configured:■ Memory mirroring between different mirror sets.Gr oup#1 Group#2ABC DEEE#1 #2#3 #4#5 #6#1 #2Data 1Data 2Data 3Data 4Data 1Data 3Data 4Data 2
