Compaq 108164-003 - ProLiant - 800 Integration Notes page 46

PCI Bus Numbering in a Microsoft Windows NT Environment
Reviewing the Test 2 Configuration
In Test 2, as in Test 1, the PCI BIOS begins the discovery process by identifying buses on the
Primary PCI Bus which is assigned bus 0. The network controller in slot 1 is also assigned bus 0
as it was before. Slot 2 on the Primary Bus now contains a SMART-2/P Drive Array (a bridged
controller), which increments the bus number assignment to bus 1. This changes all bus number
assignments detected after this controller in the discovery order. The Secondary PCI Bus
previously assigned bus 1 is now incremented to bus 2. Slot 4 still contains the non-bridged
network controller and it receives the bus number of the bus where it resides, in this example bus
2.
At this point, Windows NT is not aware that the bus number assignments have changed. The
bindings for the network controller in slot 4 are no longer applicable and must be manually reset
for this controller to function in the configuration once again. Refer to the "Compaq TLAN
Network Teaming and Configuration" section in this document for instructions on how to reset
the bindings.
Comparison of Test 1 to Test 2 - Configuration A
When you reboot the server and run the System Configuration utility to view the hardware
configuration changes, it displays slot and bus number assignments. Test 2 data was recorded and
compared to Test 1.
A side-by-side comparison of the slot configurations and bus numbers of each device in Test 1 to
the slot configurations and bus numbers of each device in Test 2, illustrates what bus numbers
were changed after modifications took place.
Slot Type Controller
Slot 1 Netelligent 10/100 TX (non-bridged)
Slot 2 SMART-2/P Drive Array (bridged)
Slot 3 Empty
Slot 4 Netelligent 10/100 TX (non-bridged)
Slot 5 Empty
Slot 6 Empty
Slot 7 Empty
Slot 8 Empty
Configuration B, ProLiant 6000 and 7000
Test 1 is the first of two installations tested on the ProLiant 6000 and ProLiant 7000 servers. Each
server was set up as an original Window NT server configuration. All the controllers included in
this configuration were installed in the server before Windows NT was loaded on the system.
Because they were a part of the original configuration, Windows NT detected the network
controllers during the installation process. However, when additional controllers are later added
to the system in a modified configuration, PCI bus renumbering does occur. The information that
follows in this section explains these changes as they occur and how you can easily modify
Windows NT with several Compaq and Windows NT utilities.
13UK-1200A-WWEN
Test 1 Test 2 Bus Assignment
$ $
Bus 0 - No Change
$
Bus 1 – New
N/A
$ $
Bus 1 to Bus 2 - Changed
N/A
N/A
N/A
N/A
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