Memory Mirroring Feature - NEC N8100-1223F User Manual

Memory Mirroring / Memory RAID Feature

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 memory boards 1 and 2
Mirroring with a pair of memory boards 1 and 2 and a pair of memory boards 3 and 4
To enable the memory mirroring feature, the combined memory boards must have the DIMM of
same capacities.
The table below shows combinations of memory boards installed.
Memory board 1
A 2GB (1GB*2)
B 8GB (2GB*4)
C 4GB (1GB*4)
D 16GB (4GB*4)
Memory RAID Feature
If one of the four memory boards encounters an uncorrectable error, the memory RAID feature
switches to the other memory board to continue operation. To use this feature, four memory boards
must be installed. Each memory board must have the DIMM of same capacities.
The table below shows combinations of memory boards installed.
Memory board 1
A 2GB (1GB*2)
B 8GB (2GB*4)
C 4GB (1GB*4)
D 16GB (4GB*4)
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].
To enable the memory RAID feature: Select [RAID].
Memory board 2
2GB (1GB*2)
8GB (2GB*4)
4GB (1GB*4)
16GB (4GB*4)
Memory board 2
2GB (1GB*2)
8GB (2GB*4)
4GB (1GB*4)
16GB (4GB*4)
General Description 2-15
Memory board 3
2GB (1GB*2)
8GB (2GB*4)
–
16GB (4GB*4)
Memory board 3
2GB (1GB*2)
8GB (2GB*4)
4GB (1GB*4)
16GB (4GB*4)
Memory board 4
2GB (1GB*2)
8GB (2GB*4)
–
16GB (4GB*4)
Memory board 4
2GB (1GB*2)
8GB (2GB*4)
4GB (1GB*4)
16GB (4GB*4)