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IBM Power 770 and 780 (9117-MMD, 9179-MHD) Technical Overview and Introduction
Figure 2-9 shows how Active Memory Mirroring uses DIMM-quads.
Figure 2-9 Active Memory Mirroring in a single CEC
To enable AMM feature, the server must have at least eight DIMMs of the same size
populated on slots J1A to J8A. It is also mandatory that the server has enough free memory
to accommodate the mirrored memory pages.
Besides the hypervisor code itself, other components that are vital to the server operation are
also mirrored:
Hardware page tables (HPTs), responsible for tracking the state of the memory pages
assigned to partitions
Translation control entities (TCEs), responsible for providing I/O buffers for the
partition’s communications
Memory used by the hypervisor to maintain partition configuration, I/O states, virtual I/O
information, and partition state
P3-C28
P3-C29
P3-C27
P3-C26
P3-C25
P3-C24
P3-C23
P3-C22
A
B
B
B
M0 - D SN DDR3 DIMM #16
M0 - C SN DDR3 DIMM #15
M0 - B SN DDR3 DIMM #14
M0 - A SN DDR3 DIMM #13
Regulator 8
TPMD Card
Regulator 7
Regulator 6
Regulator 5
DIMM Quad 2
DIMM Quad 2
Mirrored Hypervisor code
Mirrored Hypervisor code
M0 - D SN DDR3 DIMM #12
M0 - C SN DDR3 DIMM #11
M0 - B SN DDR3 DIMM #10
M0 - A SN DDR3 DIMM #9
DIMM Quad 2
DIMM Quad 2
Hypervisor code
Hypervisor code
Loc Code Conn Ref
P3-C1
J1A
P3-C2
J2A
P3-C3
J3A
P3-C4
J4A
P3-C5
FSI 3
FSI 5
FSI 13
FSI 15
FSI 6
FSI 4
FSI 16
FSI 14
P3-C6
P3-C7
J5A
P3-C8
J6A
P3-C9
J7A
P3-C10 J8A
P3-C11 J1B
P3-C12 J2B
P3-C13 J3B
P3-C14 J4B
P3-C15
P3-C16
P3-C17
P3-C18 J5B
P3-C19 J6B
P3-C20 J7B
P3-C21 J8B
Midplane Connector
Regulator 1
Regulator 2
Regulator 3
Regulator 4
P7+ CP3
SNFSI 0, 4
SNFSI 1, 5
SNFSI 2, 6
SNFSI 3, 7
P7+ CP1
P7+ CP3
P7+ CP1
SNFSI 0, 4
SNFSI 1, 5
SNFSI 2, 6
SNFSI 3, 7
FSI0
FSI1
MC0
MC0
FSI0
FSI1
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