NEC Express5800/T120h User Manual page 83

Chapter 2 Preparations
The conditions to use this function are described below.

Install the DIMMs with the same model numbers to this unit.

Change the following parameters and save the settings.
From the System Utilities, select "System Configuration > BIOS/Platform Configuration (RBSU) > System
Options > Memory Operations" to set "Advanced Memory Protection" to "Fault Tolerant Memory
(ADDDC)".
 After restarting, check that "Advanced Memory Protection Mode: Fault Tolerant Memory (ADDDC)"
appears on POST.
The memory ADDDC functions with the following features cannot be configured.

DIMMs with the different model numbers are mounted.
Cautions for setting the memory ADDDC
If the DIMM configuration that cannot allow the memory ADDDC configuration is detected while "Fault
Tolerant Memory (ADDDC)" is set to "Advanced Memory Protection" and the memory ADDDC configuration is
specified, the "Advanced ECC" setting is enabled when [Advanced Memory Protection] runs.
Cautions for replacement of DIMM due to a failure
In case of a failure, identify the faulty DIMM from IML, and replace DIMM in a unit of one piece of DIMM.
Note To use the memory ADDDC function, mount "Eight or twelve DIMMs" per CPU.

 The DIMM compatible with the memory ADDDC function is "N8102-709",
"N8102-711", and "N8102-712".
 Install the memories with the same model numbers to this unit.
Express5800/T120h User's Guide
1. Installing Internal Optional Devices
83