Connecting Cascaded Appliances; Directly Connecting Cascaded Appliances - HP Open View Installation And Maintenance Manual

Connecting the Appliance to Hosts and Storage Arrays

Connecting cascaded appliances

You can directly connect or interconnect (using zoned Fibre Channel switches) two appliances
and create a cascaded configuration. A cascaded configuration enables cross-appliance
mirroring, which means you can mirror data from storage on one appliance to storage on
another appliance through a Fibre Channel cable.
After you complete the appropriate connections, refer to
Mirrors" in the HP OpenView Continuous Access Storage Appliance System Administrator's
Guide for instructions on creating cross-appliance mirrors.
Whether you are using switches and fabrics or directly connecting the appliances to create a
cascaded configuration, HP recommends that you dedicate an initiator port (I5) and target port
(T5) on each appliance node to make these connections.
If you move an existing appliance configuration to a cascaded environment, you must rezone
and reconnect all hardware to accommodate the dedicated initiator port and target port.

Directly connecting cascaded appliances

Figure 21
In this example, assume the following:
88
shows two appliances directly connected to create a cascaded configuration.
I0 on each peer node connects to the shared storage.
Port B on node 0 connects to port B on node 1 of appliance A, and port B on node 0
connects to port B on node 1 of appliance B.
T5 on node 0 of appliance A connects to I5 on node 0 of appliance B.
T5 on node 0 of appliance B connects to I5 on node 0 of appliance A.
T5 on node 1 of appliance A connects to I5 on node 1 of appliance B.
T5 on node 1 of appliance B connects to I5 on node 1 of appliance A.
Continuous Access Storage Appliance Installation and Maintenance Guide
"Managing Cross-Appliance