NEC Express5800/B120f User Manual page 50

Chapter 2 Preparations
(1)
Memory Mirroring Feature
Memory Mirroring feature writes the same data into two groups of DIMMs (mirror set) between memory
channels (channels 2 and 3) to provide data redundancy.
Example: 2-CPU configuration
50
•
Note
Memory Mirroring feature uses channels 2 and 3.
•
DIMMs used in mirror set must be of the same model number.
CPU1
Memory Controller
CH1 CH2
CPU1-DIMM4 CPU1-DIMM5
CPU1-DIMM1
CPU1-DIMM2
CPU2
1
Memory Controller
CH1 CH2
CPU2-DIMM4 CPU2-DIMM5
CPU2-DIMM1 CPU2-DIMM2
The operating system only recognizes a half of the total physical capacity.
Tips
Express5800/B120f User's Guide
1. Installing Internal Optional Devices
CH3
Mirror set #3
CPU1-DIMM6
Mirror set #1
CPU1-DIMM3
CH3
Mirror set #4
CPU2-DIMM6
Mirror set #2
CPU2-DIMM3