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User Guide
161
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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.
Caution
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.
Figure 115: Memory Branches
A: Motherboard
B: Memory Controller
C: Memory Branch #1
D: Memory Branch #2
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.
A
B
C
D
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