1. Installing Internal Optional Devices
Express5800/R120g-2E User's Guide
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Chapter 2 Preparations
(3)
Memory sparing feature
The 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 active memory controller, the feature
automatically changes the active DIMM from the failed one to a DIMM in the standby state to continue the
processing.
Note
To use the Memory Sparing feature, install N8102-693/694 additional memory card
(two DIMMs of same model).
DIMMs installed in the system must be of the same model number.
Tips
The operating system can use the DIMMs as those with capacities less than the
actual physical capacities. The capacities vary depending on the number of DIMMs
and the physical capacity per DIMM.
The following table shows configuration allowable for memory sparing and system logical memory capacity.
Number of CPUs
Number of DIMMs
Capacity of DIMM installed
N8102-693 (16 GB x2)
N8102-694 (32 GB x2)
1
2
24 GB
48 GB
4
48 GB
96 GB
6
72 GB
144 GB
8
96 GB
192 GB
2
4
48 GB
96 GB
6
72 GB
144 GB
8
96 GB
192 GB
10
120 GB
240 GB
12
144 GB
288 GB
14
168 GB
336 GB
16
192 GB
384 GB
