NEC Express5800/R140a-4 User Manual page 410

9-58 Upgrading Your Server
Memory Mirroring
The server supports the Memory Mirroring feature.
To use Memory Mirroring feature, select the supported function from the BIOS Setup Utility in the
configuration enabling the relevant environment build-up.
Memory Mirroring Feature
The memory mirroring feature places a memory board as spare memory in standby state. If the
current memory board encounters an uncorrectable error, the memory mirroring feature switches to
the standby memory board. When this feature is used, the current memory board and the standby
memory board should be combined. Available combinations are:
Mirroring with a pair of memory boards A and B and a pair of memory boards C and D
To enable the memory mirroring feature, the combined memory boards must have the DIMM of
same size and capacities.
Setting BIOS
Start SETUP and select [Advanced] → [Memory Configuration] → [Memory RAS Feature] in
order and set as follows:
To enable the memory mirroring feature: Select [Mirror].