Compaq ProLiant 7000 Compaq ProLiant 7000 Server Technology - Page 9

cont., I/O Board., Three LEDs on the I/O

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ECG078/0698 TECHNOLOGY BRIEF (cont.) ... board (slot 10/11 SCSI ports 1, 2, and 3) where the buses are cabled to the three internal drive cages. This eliminates cabling between the controller and I/O board. Slots 5 and 6 on PCI Bus 2 are shared with an embedded dual-channel SCSI controller (SCSI ports 2 and 3). Slots 3 and 4 on PCI Bus 1 are shared with the Standard Peripheral Board. The aggregate peak data transfer rate across the three PCI buses is 532 MB/s. Because of the high bandwidth of the three PCI buses, PCI bus load balancing is not required. The system interlocks provide a closed-loop checking mechanism for verifying proper component mating and cabling interconnects between critical server components. Three LEDs on the I/O board can be used to isolate improperly mated components. To protect critical components, the server will not power up if the interlock is broken. 64-bit PCI Hot Plug with Extended SCSI 64-bit PCI Hot Plug 32-bit PCI Hot Plug ISA Modem Slot Slot 10/11 SCSI Ports 1, 2, 3 65 PCI 9 8 7 Bus 2 11 10 PCI Bus 3 43 PCI Bus 1 1 2 Figure 4: I/O Board. Standard Peripheral Board Slot SCSI Port 2 SCSI Port 3 System Interlock LEDs 9

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T
ECHNOLOGY
B
RIEF
(cont.)
9
ECG078/0698
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board (slot 10/11 SCSI ports 1, 2, and 3) where the buses are cabled to the three internal drive
cages.
This eliminates cabling between the controller and I/O board.
Slots 5 and 6 on PCI Bus 2 are shared with an embedded dual-channel SCSI controller (SCSI
ports 2 and 3).
Slots 3 and 4 on PCI Bus 1 are shared with the Standard Peripheral Board.
The aggregate peak data transfer rate across the three PCI buses is 532 MB/s.
Because of the
high bandwidth of the three PCI buses, PCI bus load balancing is not required.
The system interlocks provide a closed-loop checking mechanism for verifying proper component
mating and cabling interconnects between critical server components.
Three LEDs on the I/O
board can be used to isolate improperly mated components.
To protect critical components, the
server will not power up if the interlock is broken.
64-bit PCI Hot Plug
with Extended SCSI
32-bit PCI
Hot Plug
Slot 10/11
SCSI Ports
1, 2, 3
ISA Modem
Slot
Standard
Peripheral
Board Slot
64-bit PCI
Hot Plug
System Interlock
LEDs
1
3
11
10
9
8
7
6
5
4
2
PCI
Bus 1
PCI
Bus 2
PCI
Bus 3
SCSI Port 2
SCSI Port 3
Figure 4: I/O Board.