HP StorageWorks HSG80 ACS Solution Software V8.8 for HP-UX Installation and Configuration Guide (AA-RV1FA-TE, March 2005)

Planning a Subsystem
54 HSG80 ACS Solution Software V8.8 for HP-UX Installation and Configuration Guide
Note: These techniques also work for a single controller.
Restricting Host Access by Separate Links
In transparent failover mode, host port 1 of controller A and host port 1 of
controller B share a common Fibre Channel link. Host port 2 of controller A and
host port 2 of controller B also share a common Fibre Channel link. If the host 1
link is separate from the host 2 link, the simplest way to limit host access is to
have one host or set of hosts on the port 1 link, and another host or set of hosts on
the port 2 link. Each host can then see only units assigned to its respective
controller port. This separation of host buses is shown in Figure 16. This method
applies only if the host 1 link and host 2 link are separate links.
Note: It is highly recommended that you provide access to only specific connections.
This way, if new connections are added, they do not have automatic access to all units.
See the following section “Restricting Host Access by Disabling Access Paths” on
page 55.