HP Integrity rx7640, Service Manual

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board 0 and cell board 1 communicates through an SBA over the SBA link. The SBA link consists
of both an inbound and an outbound link with an effective bandwidth of approximately 11.5
GB/sec. The SBA converts the SBA link protocol into “ropes.” A rope is defined as a high-speed,
point-to-point data bus. The SBA can support up to 16 of these high-speed bi-directional rope
links for a total aggregate bandwidth of approximately 11.5 GB/sec. Each LBA acts as a bus
bridge, supporting either one or two ropes and capable of driving 33 MHz or 66 MHz for PCI
cards. The LBAs can also drive at 66 MHz or 133 MHz for PCI-X cards, and at 266 MHz for PCI-X
mode 2 cards installed in mode 2 capable slots.
Figure 1-12 PCI-X Board to Cell Board Block Diagram
PCI Slot 8 LBA 1
Cell
Controller
(CC)
Cell Board
PCI Slot 7 LBA 2
PCI Slot 6 LBA 4
PCI Slot 5 LBA 6
PCI Slot 4 LBA 14
PCI Slot 3 LBA 12
PCI Slot 2 LBA 10
PCI Slot 1 LBA 8
System Bus
Adapter (SBA)
System
LBA
Backplane
Adapter (SBA)
System Bus
PCI Slot 8 LBA 1
PCI Slot 2
PCI Slot 1
PCI Slot 3
LBA 8
LBA 10
LBA 12
PCI Slot 4
PCI Slot 5
PCI Slot 6
PCI Slot 7
LBA 4
LBA 6
LBA 14
LBA 2
LBA
Controller
Cell Board
Cell
(CC)
Table 1-3 and Table 1-4 list the mapping of PCI-X slots to boot paths. The cell column refers to
the cell board installed in the server in cell slot 0 and in cell slot 1.
Table 1-3 PCI-X paths for Cell 0
Path IO Chassis PCI-X Slot Cell
0/0/8/1 0 1 0
0/0/10/1 0 2 0
0/0/12/1 0 3 0
0/0/14/1 0 4 0
0/0/6/1 0 5 0
0/0/4/1 0 6 0
0/0/2/1 0 7 0
0/0/1/1 0 8 0
30 HP Integrity rx7640 Server and HP 9000 rp7440 Server Overview