General Description 2-15Memory Mirroring / Memory RAID FeatureMemory Mirroring FeatureThe memory mirroring feature places a memory board as spare memory in standby state. If thecurrent memory board encounters an uncorrectable error, the memory mirroring feature switches tothe standby memory board. When this feature is used, the current memory board and the standbymemory 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 4To enable the memory mirroring feature, the combined memory boards must have the DIMM ofsame capacities.The table below shows combinations of memory boards installed.Memory board 1 Memory board 2 Memory board 3 Memory board 4A 2GB (1GB*2) 2GB (1GB*2) 2GB (1GB*2) 2GB (1GB*2)B 8GB (2GB*4) 8GB (2GB*4) 8GB (2GB*4) 8GB (2GB*4)C 4GB (1GB*4) 4GB (1GB*4) – –D 16GB (4GB*4) 16GB (4GB*4) 16GB (4GB*4) 16GB (4GB*4)Memory RAID FeatureIf one of the four memory boards encounters an uncorrectable error, the memory RAID featureswitches to the other memory board to continue operation. To use this feature, four memory boardsmust be installed. Each memory board must have the DIMM of same capacities.The table below shows combinations of memory boards installed.Memory board 1 Memory board 2 Memory board 3 Memory board 4A 2GB (1GB*2) 2GB (1GB*2) 2GB (1GB*2) 2GB (1GB*2)B 8GB (2GB*4) 8GB (2GB*4) 8GB (2GB*4) 8GB (2GB*4)C 4GB (1GB*4) 4GB (1GB*4) 4GB (1GB*4) 4GB (1GB*4)D 16GB (4GB*4) 16GB (4GB*4) 16GB (4GB*4) 16GB (4GB*4)Setting BIOSStart SETUP and select [Advanced] → [Memory Configuration] → [Memory RAS Feature] inorder and set as follows: To enable the memory mirroring feature: Select [Mirror]. To enable the memory RAID feature: Select [RAID].
