Chapter 1
HP Integrity rx8640 and HP 9000 rp8440 Server Overview
Detailed Server Description
34
The server supports two internal SBAs. Each SBA provides the control and interfaces for eight PCI-X slots.
The interface is through the rope bus (16 ropes per SBA). For each SBA, the ropes are divided in the following
manner:
• A single rope is routed to support the core I/O boards through LBAs located on the system backplane.
• A single rope is routed to an LBA on the PCI backplane to support a slot for PCI and PCI-X cards (slot 8).
• Six ropes are bundled into double ropes to three (3) LBAs. They support slots 1, 2, and 7 for PCI and
PCI-X mode 1 cards.
• Eight fat ropes are bundled into quad ropes to four (4) LBAs. They support slots 3, 4, 5, and 6 for PCI and
PCI-X mode 2 cards.
NOTE PCI-X slots 1-7 are dual rope slots while slot 8 is a single rope slot. A rope is defined as a
high-speed, point-to-point data bus.
Each of the 16 slots is capable of 33 MHz/66 MHz PCI or 66 MHz/133 MHz PCI-X. Four slots in PCI-X support
266 MHz. All 16 PCI slots are keyed for 3.3 V connectors (accepting both Universal and 3.3 V cards). The
PCI-X backplane does not provide any 5 V slots for the I/O cards. Table 1-8 on page 35 summarizes the PCI-X
slot types.
The PCI-X backplane is physically one board, yet it behaves like two independent partitions. SBA 0 and its
associated LBAs and eight PCI-X slots form one I/O partition. SBA 1 and its associated LBAs and eight PCI-X
slots form the other I/O partition. One I/O partition can be reset separately from the other I/O partition but
cannot be powered down independently.
0 7 2/3 0/0/2/1/0
0 8 1 0/0/1/1/0
Table 1-7 PCI-X Slot Boot Paths Cell 1
Cell PCI Slot Ropes Path
1 1 8/9 1/0/8/1/0
1 2 10/11 1/0/10/1/0
1 3 12/13 1/0/12/1/0
1 4 14/15 1/0/14/1/0
1 5 6/7 1/0/6/1/0
1 6 4/5 1/0/4/1/0
1 7 2/3 1/0/2/1/0
1 8 1 1/0/1/1/0
Table 1-6 PCI-X Slot Boot Paths Cell 0 (Continued)
Cell PCI Slot Ropes Path
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