Compaq 112726-001 - ProLiant - 6500 Technology Brief page 9

ECG078/0698
T B
ECHNOLOGY RIEF
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board (slot 10/11 SCSI ports 1, 2, and 3) where the buses are cabled to the three internal drive
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cages. This eliminates cabling between the controller and I/O board.
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Slots 5 and 6 on PCI Bus 2 are shared with an embedded dual-channel SCSI controller (SCSI
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ports 2 and 3). Slots 3 and 4 on PCI Bus 1 are shared with the Standard Peripheral Board.
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The aggregate peak data transfer rate across the three PCI buses is 532 MB/s. Because of the
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high bandwidth of the three PCI buses, PCI bus load balancing is not required.
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The system interlocks provide a closed-loop checking mechanism for verifying proper component
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mating and cabling interconnects between critical server components. Three LEDs on the I/O
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board can be used to isolate improperly mated components. To protect critical components, the
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server will not power up if the interlock is broken.
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64-bit PCI Hot Plug
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with Extended SCSI
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Slot 10/11
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SCSI Ports
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1, 2, 3
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1 1
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9
(cont.)
32-bit PCI
Hot Plug
64-bit PCI
Hot Plug
5
6
P C I
B u s 2
7
9 8
1 0
P C I
B u s 3
Figure 4: I/O Board.
I S A M o d e m
Slot
3
4
S t a n d a r d
P C I
Peripheral
B u s 1
1
B o a r d S l o t
SCSI Port 2
2
SCSI Port 3
System Interlock
L E D s