NEC Express5800 Series User Manual page 64

Chapter 2 Preparations
Memory Mirroring feature can be used under the following conditions:
•
Install DIMMs in DIMM sockets to configure a mirror set.
• All the installed DIMMs must be the same capacity.
• See Chapter 2 (1. System BIOS) in "Maintenance Guide", check if your server supports Memory Mirroring
feature.
Select Advanced → Memory Configuration → Memory Information, and check if Supported is
displayed in Mirroring.
• See Chapter 2 (1. System BIOS) in "Maintenance Guide" to change parameters as shown below.
Advanced → Memory Configuration → Memory RAS Mode → Change to Mirroring.
• After restart, run SETUP again, and check if "Mirrored" is displayed for the following parameter.
Advanced → Memory Configuration → Memory Information → CPUx_DIMMx Status
•
Installation order depends on CPU configuration. See the figure below.
1CPU 2CPU
configuration configuration
2 3
4 7
2 3
4 7
3 5
1 1
3 5
1 1
4
8
4
8
6
2
6
2
Memory Mirroring cannot be configured in the following case:
•
Memory Mirroring within a specific memory channel
Notes on Configuring Memory Mirroring
In Memory Mirroring configuration, Memory RAS Mode menu is changed from "Mirroring" to "Independent" in
the following cases:
•
When you additionally install DIMMs that unable to configure Memory Mirroring
•
When you remove DIMMs that takes down Memory Mirroring
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CPU1_DIMM 3
CPU1_DIMM 7
CPU1_DIMM 4
CPU1_DIMM 8
CPU1_DIMM 6
CPU1_DIMM 2
CPU1_DIMM 5
CPU1_DIMM 1
CPU2_DIMM 3
CPU2_DIMM 7
CPU2_DIMM 4
CPU2_DIMM 8
CPU2_DIMM 6
CPU2_DIMM 2
CPU2_DIMM 5
CPU2_DIMM 1
Express5800/R120g-1E User's Guide
1. Installing Internal Options