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.
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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
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Figure 115: Memory Branches
A: Motherboard
B: Memory Controller
C: Memory Branch #1
D: Memory Branch #2
A
D
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