HP NetServer AA 4000 HP AA HP Netserver 4000 Reference Guide - Page 69

Ch 4: Networking Explaineds Windows NT Bus Numbering Network services, protocols, and bindings will have to be configured as part of the software installation. Working with multiple network cards and configuring software parameters can sometimes be confusing when mapping the physical slots to what the operating system displays. It is imperative that the relationship between physical slots and Windows NT slot numbering is known. Incorrect bindings and protocols on the network cards can cause problems for disk mirroring and client/server access. One strategy of making sure the correct bindings go with the right card in a particular physical slot is to only install and configure one network card at a time. This may work with a simple cluster configuration, but it is not practical in this environment. Understanding the relationship of physical cards to software settings is preferred to maintain availability of the system when performing configurations, upgrades, or maintenance. How Windows NT sees it... In general, Windows NT will number the PCI slots in the order they are detected. NT will detect PCI slots in the order of the PCI bus detection and also assign slot numbers to detected PCI bridge chips. As noted in the slide above, the NT detection of the PCI slots in the NetServer LH 3 and 4 starts with Bus 0 Slot 8 (physical) and assigns it Bus 0 slot 1 (software). As it makes its way to a new bus, the first slot goes to the bridge chip and then the PCI slots. For example, Slot 5 (physical) in the LH 3 and 4 is assigned Bus 1 slot 3 in Windows NT. NOTE When in doubt of which slot a card is located in, refer to the information printed directly on the I/O board instead of the external case numbering. Network Server Division 4-3