![background image](http://html1.mh-extra.com/html/nec/express5800-r120g-2m/express5800-r120g-2m_user-manual_3944086067.webp)
1. Installing Internal Optional Devices
Express5800/R120g-2M User’s Guide
67
Chapter 2 Preparations
(3)
Memory Sparing Feature
Memory Sparing feature puts a memory channel 2 of a memory controller in each CPU into standby status as
spare devices. If a correctable error occurs in a DIMM in the running memory controller, the feature
automatically changes the running DIMM from the failed one to a DIMM in the standby state to continue the
processing.
Note
To use Memory Sparing feature, install N8102-672/673 additional memory board
(three DIMMs of same model).
DIMMs installed in the system must be of the same model number.
The following table shows configuration allowable for memory sparing and system logical memory capacity.
Number of
CPUs
Number of
DIMMs
Memory capacity
8GB DIMM
16GB DIMM
1 3 20GB 40GB
6 40GB 80GB
9 60GB 120GB
12 80GB 160GB
2 6 40GB 80GB
12 80GB 160GB
18 120GB 240GB
24 160GB 320GB