Compaq ProLiant Clusters HA/F100 Administrator's Manual page 88

3-8 Compaq ProLiant Clusters HA/F100 and HA/F200 Administrator Guide
The host bus adapters, which connect the two servers to the storage through
Fibre Channel storage hubs or FC-AL switches, are installed in each server
like any other PCI card. The HA/F100 cluster requires one host bus adapter
per server, while the HA/F200 requires two host bus adapters per server. The
extra host bus adapter in each server contributes to the enhanced high
availability features of the HA/F200. The dual host bus adapters, in
conjunction with dual Fibre Channel storage hubs or FC-AL switches and dual
array controllers form two completely independent paths to the storage,
making the server-to-storage connection totally redundant. However, it is
important to ensure that each host bus adapter in a particular server is
connected to a different hub, because it is physically possible to connect the
servers to the storage hubs is such a way that the cluster seem to be working
correctly, but will not be able to fail over properly.
NOTE: To determine the preferred slots for installing the host bus adapters, use PCI
bus-loading techniques to balance the PCI bus for your hardware and configuration. For
more information, refer to your server documentation and the Compaq white paper,
"Where Do I Plug the Cable? Solving the Logical-Physical Slot Numbering Problem,"
available from the Compaq website (http://www.compaq.com).
Installing the Cluster Interconnect
There are many ways to physically set up an interconnect. See Chapter 1 for a
description of the types of interconnect strategies.
If you are using a dedicated interconnect, install an interconnect adapter card
(Ethernet or ServerNet) in each cluster node. If you are sharing your LAN NIC
with your interconnect, install the LAN NIC.
NOTE: To determine the preferred slot for installing the interconnect card, use PCI
bus-loading techniques to balance the PCI bus for your hardware and configuration. If you
are installing the ServerNet card, treat it as a NIC in determining the preferred installation
slot for maximum performance. For more information, see your server documentation and
the Compaq white paper, "Where Do I Plug the Cable? Solving the Logical-Physical Slot
Numbering Problem," available from the Compaq website (http://www.compaq.com).
For specific instructions on how to install an adapter card, refer to the
documentation for the interconnect card you are installing or the Compaq
ProLiant server you are using. The cabling of interconnects is outlined later in
this chapter.