Using Memory Ras Feature - NEC Express5800 Series User Manual

Chapter 2 Preparations
1.8.8

Using Memory RAS Feature

This server has RAS feature including Standard Memory feature (x4 SDDC ECC memory), Memory Mirroring
feature, Memory Sparing feature, and Memory Lock Step (x8 SDDC ECC memory) feature. Single Device
Correction (SDDC) allows automatic correction of memory error (multi-bit error).
The memory area on the motherboard of the server is divided into four memory channels.
Memory controller
Memory Mirroring, Memory Lock Step, and Memory Sparing features keep memory redundancy between
memory channels by monitoring or altering memory active/inactive status, respectively.
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Note
• See List of features supported by additional memory board in 1.8.3 Memory RAS
Feature before using memory RAS feature.
• Only the features that additional memory board supports can be used.
Express5800/R120g-1E User's Guide
1. Installing Internal Options
Memory controller