NEC Express5800 Series User Manual page 63

Chapter 2 Preparations
(1)
Memory Mirroring Feature
Memory Mirroring feature writes the same data into two groups of DIMMs (mirror set) corresponding with each
other between memory channels (channels 0 and 1 or channel 2 and 3) to provide data redundancy.
Example: 2-CPU configuration
Mirror set
Mirror set
Data 1 Data 1
Data 2 Data 2
Data 3 Data 3
Data 4 Data 4
Mirror set
Mirror set
Note
• Memory Mirroring feature uses channels 0 and 1 or channels 2 and 3.
• To use Memory Mirroring feature, install N8102-680/681 additional memory
board (two DIMMs of same model).
• DIMMs used in mirror set must be of the same model number.
#5
#1
#6
#2
Tips
The operating system can use a half of the total physical memory capacity.
Express5800/R120g-1E User's Guide
Memory controller
Memory controller
1. Installing Internal Options
Mirror set
#7
Mirror set
#3
Mirror set
#8
Mirror set
#4
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