NEC Express5800 User Manual page 430

9-92 Upgrading Your Server
Memory Spare Feature
The memory spare feature puts a memory channel 2 into standby status as spare memory. If an
uncorrectable error occurs in a DIMM under 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.
IMPORTANT:
To use the memory spare feature, the additional memory boards

(N8102-379/380/381/382/383) are required.
To use the memory spare feature, the additional memory boards

must have the same capacity.
Example: In 2-CPU configuration
Spare set #3
Spare set #1
Spare set #4
Spare set #2
Memory controller
In operation
Memory controller
In operation
Standby
Standby