Using The Memory Ras Features - NEC Express5800 120Rj-2 User Manual

User Guide

Using the Memory RAS Features

The server has the memory mirroring and online spare memory features as well as the
x4/x8 SDDC ECC memory feature, which can automatically correct a memory error
(multi-bit error) causing system shutdown.
The memory mirroring and online spare memory features are
not available in the normal memory configuration. (The x4/x8
SDDCl ECC memory feature can operate in any configuration.)
The memory area on the motherboard of the server is divided into two memory
branches as shown in the figure below.
#11
#1
#12
#3
#13
#5
The memory mirroring and online spare memory features keep memory redundancy
between memory branches and within a memory branch by monitoring or altering
memory active/inactive status, respectively.
Caution
B
C
#21
#31
#22
#32
#23
#33
Figure 115: Memory Branches
A: Motherboard
B: Memory Controller
C: Memory Branch #1
D: Memory Branch #2
A
D
#41
#2
#42
#4
#43
#6
161
www.nec-computers.com