NEC Express5800 Series User Manual page 73

Chapter 2 Preparations
Standby
Active
Standby
Active
Memory Sparing feature can be used under the following conditions:

Install DIMMs in two DIMM sockets configuring a spare set.

DIMMs to be installed should have the same capacity.

See Chapter 2 (1. System BIOS) in "Maintenance Guide" , run SETUP, change parameters as shown
below, save the settings, and exit from SETUP.
Advanced Memory Configuration] Memory RAS Mode. Change to Sparing

After restart, run SETUP again, and check if "Spared" is displayed for the following parameter.
Advanced  Memory Configuration  Memory Information  CPUx_DIMMx Status

Installation order depends on CPU configuration. See the figure below.
Spare set
Spare set
#1
#3
Spare set
Spare set
#2
#4
Express5800/T120g User's Guide
Memory controller
Spare set
#5
Memory controller
Spare set
#6
1. Installing Internal Optional Devices
Spare set
#7
Spare set
#8
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