NEC Express5800/A1080a, User Manual, Page: 106 / 696

Hardware
106
(2) Mirroring between processor memory modules
Mirroring should be performed between the adjacent processor memory modules as shown
below.
A1080a-S Model: Processor Memory Modules #1 and #2; #3 and #4
A1080a-D Model: Processor Memory Modules #1 and #2; #3 and #4
Processor Memory Modules #5 and #6; #7 and #8
A1080a-E Model: Processor Memory Modules #1 and #2; #3 and #4; #5 and #6;
#7 and #8
A processor memory module with a lower number is mirrored in principle.
Mirroring is not performed regardless of the settings when the adjacent processor memory
module does not exist or the memory capacity differs.
Mirroring between processor memory modules
Processor memory module # 1 Processor memory module # 2
Processor
Memory
Module#2
Processor
Memory
Module#1
Processor
Memory
Module#8
Processor
Memory
Module#7
Processor
Memory
Module#6
Processor
Memory
Module#5
Processor
Memory
Module#4
Processor
Memory
Module#3
Mirroring is not performed
when the corresponding
module is not mounted or
the memory capacities
differ.
Processor
Memory
Controller#1
PAIR #1
PAIR #3
PAIR #5
PAIR #7
PAIR #2
PAIR #4
PAIR #6
PAIR #8
Memory
Controller#2
Processor
Memory
Controller#1
PAIR #1
PAIR #3
PAIR #5
PAIR #7
PAIR #2
PAIR #4
PAIR #6
PAIR #8
Memory
Controller#2