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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
Mirror set
Data 1
Data 1
Data 2
Data 2
Data 3
Data 3
Data 4
Data 4
Mirror set
Mirror set
Mirror set
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Note
• Memory Mirroring feature uses channels 0 and 1 or channels 2 and 3.
• To use Memory Mirroring feature, install N8102-472/473/474/475 additional memory
board (two DIMMs of same model).
• DIMMs to be installed in mirror set must have same capacity.
#9
#5
#1
#10
#6
#2
Tips
The operating system only recognizes a half of the total physical capacity.
Express5800/R120d-1M User's Guide
1. Installing Internal Optional Devices
Memory controller
Memory controller
Mirror set
#11
Mirror set
#7
Mirror set
#3
Mirror set
#12
Mirror set
#8
Mirror set
#4
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