IBM Power 780 Technical Overview And Introduction page 70

Figure 2-9 shows how Active Memory Mirroring uses DIMM-quads.
Regulator 1
P3-C22
P3-C23
A
P7+ CP1
P7+ CP3
P3-C24
B
Regulator 2
P3-C25
Regulator 3
P3-C26
B
P3-C27
P7+ CP3
P7+ CP1
P3-C28
B
P3-C29
Regulator 4
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
56
IBM Power 770 and 780 (9117-MMD, 9179-MHD) Technical Overview and Introduction
SNFSI 0, 4
SNFSI 1, 5
SNFSI 2, 6
SNFSI 3, 7
MC0
FSI0
FSI1
FSI0
FSI1
MC0
SNFSI 0, 4
SNFSI 1, 5
SNFSI 2, 6
SNFSI 3, 7
Hypervisor code
Hypervisor code
DIMM Quad 2
DIMM Quad 2
Regulator 5
Regulator 6
Mirrored Hypervisor code
Mirrored Hypervisor code
DIMM Quad 2
DIMM Quad 2
M0 - A SN DDR3 DIMM #9
M0 - B SN DDR3 DIMM #10
M0 - C SN DDR3 DIMM #11
M0 - D SN DDR3 DIMM #12
Regulator 7
TPMD Card
Regulator 8
M0 - A SN DDR3 DIMM #13
M0 - B SN DDR3 DIMM #14
M0 - C SN DDR3 DIMM #15
M0 - D SN DDR3 DIMM #16
Loc Code Conn Ref
P3-C1 J1A
P3-C2 J2A
P3-C3 J3A
P3-C4 J4A
FSI 3
P3-C5
FSI 13
FSI 5
FSI 15
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
FSI 6
P3-C15
FSI 16
P3-C16
FSI 4
FSI 14
P3-C17
P3-C18 J5B
P3-C19 J6B
P3-C20 J7B
P3-C21 J8B