NEC Express5800/T120d User Manual page 71

Chapter 2 Preparations
Memory Mirroring feature can be used under the following conditions:
•
Install DIMMs in two DIMM sockets configuring a mirror set.
• Refer to 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.
• Refer to Chapter 2 (1. System BIOS Setup) in "Maintenance Guide", change parameters as shown below,
save the settings and exit from SETUP.
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.
2-CPU
REAR
configuration
(Empty)
(Empty)
1st set
3rd set
1st set
3rd set
4th set
2nd set
4th set
2nd set
(Empty)
(Empty)
Memory Mirroring cannot be configured in the following case:
•
Memory Mirroring within a specific memory channel
Notes on Configuring Memory Mirroring
When you additionally install or remove DIMMs that unable to configure Memory Mirroring configuration,
Memory RAS Mode is changed to "Independent".
"Mirrored" is removed from Advanced → Memory Configuration → Memory Information → CPUx_DIMMx
Status xxxx MB (Mirrored) in BIOS SETUP.
Express5800/T120d User's Guide
1. Installing Internal Optional Devices
1-CPU
FRONT
configuration
(Empty)
(Empty)
1st set
2nd set
1st set
2nd set
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