Chapter 4. Reliability, availability, and serviceability
161
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5137ch04.fm
Figure 4-6 on page 161 illustrates how such a system could be configured to maximize
redundancy in a VIOS environment, presuming the rootvgs for each VIOS are accessed from
storage area networks.
Figure 4-6 I/O Subsystem of a POWER8 2-socket system
Physical
Virtual
DCM
I/
O
Slot
x16
Processor Chip
PHB
PHB
PCIe Ctrl
Processor Chip
PHB
PHB
PCIe Ctrl
Processor Chip
PHB
PHB
PCIe Ctrl
Processor Chip
PHB
PHB
PCIe Ctrl
x16
PCIe
Switch
x8
x8
LAN
Adapter
LAN
Adapter
FC
Adapter
For
SAN
FC
Adapter
For
SAN
LAN
Adapter
LAN
Adapter
I/
O
Sl
o
t
I/
O
Sl
o
t
I/
O
Slot
FC
Adapter
For
SAN
FC
Adapter
For
SAN
PCIe
Switch
DCM
I/
O Sl
o
t
x16
Processor Chip
PHB
PHB
PCIe Ctrl
Processor Chip
PHB
PHB
PCIe Ctrl
Processor Chip
PHB
PHB
PCIe Ctrl
Processor Chip
PHB
PHB
PCIe Ctrl
x16
x8
x8
LAN
Adapter
LAN
Adapter
FC
Adapter
For
SAN
FC
Adapter
For
SAN
LAN
Adapter
LAN
Adapter
I/
O Sl
o
t
I/
O Sl
o
t
I/
O Sl
o
t
FC
Adapter
For
SAN
FC
Adapter
For
SAN
Virtual I/O
Server 2
Virtual I/O
Server 1