NEC Express5800 Series User Manual page 66

Chapter 2 Preparations
(1)
Memory Mirroring Feature
Memory Mirroring feature writes the same data into two groups of DIMMs corresponding with each other
between memory channels (channels 0 and 1, 2 and 3) to provide data redundancy.
Example: 2-CPU configuration
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Data 1 Data 1
Data 2 Data 2
Data 3 Data 3
Data 4 Data 4
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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 N8102-691/692 additional memory
card (two DIMMs of same model).

DIMMs used in mirror set must be of the same model number.
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#1
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#2
The operating system can use a half of the total physical memory capacity.
Tips
Express5800/T120g User's Guide
1. Installing Internal Optional Devices
Memory controller
Memory controller
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