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PRIMEQUEST 2000 Series Design Guide
2.6 PCI Box (4/4)
A Configuration for Redundancy of PCI Boxes and PCI Box LH modules
The effects of a failed PCI Box are taken into account.
A Configuration for Failure Isolation of PCI Boxes
SB
IOU
Partition#0
SB
Partition#1
PRIMEQUEST
IOU
Advantage
Even if one PCI Box fails, the failed
PCI Box can be disconnected by a
reboot and the system can be
started using the other PCI Box.
Disadvantage
Both partitions stop when a PCI Box
fails.
PCI Box LH #0
PCI Box #0
PCI Box LH #1
PCI Box LH #0
PCI Box #1
SB
IOU
Partition#0
SB
Partition#1
PRIMEQUEST
IOU
PCI Box #0
PCI Box #1
Stop
Redundancy of the PCI Boxes and PCI Box LH
modules
The PCI Box is
disconnected
by a reboot.
Not
affected
The PCI Box cannot be used
until it is repaired.
The failure in partition#1 is isolated from partition#0.
PCI Box LH #1
PCI Box LH #0
PCI Box LH #1
PCI Box LH #0
For details on redundancy of PCI Express cards and connection destinations, refer to "
".
Failure
Failure
Stop
Start in a
degraded state
Start in a
degraded state
Stop
Advantage
This configuration provides failure
isolation. Even if the PCI Box for a
partition fails, the other partition is
not affected.
Disadvantage
The PCI Box for the relevant partition
cannot be used until the PCI Box is
repaired.
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PCI Box LH #1
53