9-60 Upgrading Your Server
Online Spare Memory
The online memory spare feature puts a group of memory devices within a memory branch into
standby status as spare devices. If an unrecoverable error occurs in a DIMM of the running group,
the feature automatically changes the running DIMM from the failed one to a DIMM in the standby
group to continue the processing.
NOTE: The operating system recognizes the memory devices as those
with capacities less than the actual physical capacities. (The recognized
capacities vary depending on the number of DIMMs and the physical
capacity per DIMM.)
Mother board
Memory controller
Branch #0
Group #1
Branch #1
In operation
Standby
Group #3
Group #5
Group #2
Group #4
Group #6
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