Compaq Parallel Database Cluster Model PDC/O2000 for Oracle8i and Windows 2000 Administrator Guide

Cluster Architecture 2-19
I/O Path Configuration Rules for Redundant Fibre
Channel Fabrics
The following rules must be observed in I/O path configurations for
PDC/O2000 clusters with redundant Fibre Channel Fabrics:
■ Each redundant Fibre Channel Fabric must use either an active/standby
or active/active configuration. The active/standby or active/active
configuration is confined to that redundant Fibre Channel Fabric.
■ For each redundant Fibre Channel Fabric, at least two Fibre Host
Adapters are installed in each cluster node (one for each Fibre Channel
SAN Switch).
■ For each redundant Fibre Channel Fabric, at least two Fibre Channel
SAN Switches (Fibre Channel SAN Switch #1 and Fibre Channel SAN
Switch #2) are installed between the nodes and the RA4000/RA4100
Arrays.
■ A minimum of one RA4000/RA4100 Array is required for the
active/standby configuration.
■ A minimum of two RA4000/RA4100 Arrays is required for the
active/active configuration.
■ Each RA4000/RA4100 Array must contain two array controllers to
provide redundant paths.
■ Only one of the two array controllers in an RA4000/RA4100 Array can
be active at a given time. The other array controller is the standby
controller.
■ I/O path hardware components must be connected using Fibre Channel
cables and GBIC-SW modules.