Multiple Redundant Fibre Channel Fabrics - Compaq 112726-001 - ProLiant - 6500 Administrator's Manual

Multiple Redundant Fibre Channel Fabrics

The PDC/O5000 supports the use of multiple redundant Fibre Channel Fabrics
within the same cluster. You would install additional redundant Fibre Channel
Fabrics in a PDC/O5000 to:
I
Increase the amount of shared storage space available to the cluster's
nodes. Each redundant Fibre Channel Fabric can connect to a limited
number of MA8000/EMA12000 Storage Subsystems. This limit is
imposed by the number of ports available on the Fibre Channel SAN
Switches used. The storage subsystems are available only to the host
adapters connected to that redundant Fibre Channel Fabric.
I
Increase the cluster's I/O performance.
Adding a second redundant Fibre Channel Fabric to the cluster involves
duplicating the hardware components used in the first redundant Fibre Channel
Fabric.
The maximum number of redundant Fibre Channel Fabrics you can install in a
PDC/O5000 is restricted by the number of host adapters your Compaq servers
support. Refer to the Compaq server documentation for this information.
Figure 2-5 shows a two-node PDC/O5000 with two redundant Fibre Channel
Fabrics. In this example, each redundant Fibre Channel Fabric has its own pair
of host adapters in each node, a pair of Fibre Channel SAN Switches, and two
MA8000/EMA12000 Storage Subsystems. In Figure 2-5, the hardware
components that constitute the second redundant Fibre Channel Fabric are
shaded.
Cluster Architecture 2-15