HP StorageWorks HSG80 ACS Solution Software V8.8 for OpenVMS Installation and Configuration Guide (AA-RV1PA-TE, March 2005)

Planning a Subsystem
40 HSG80 ACS Solution Software V8.8 for OpenVMS Installation and Configuration Guide
Now with V88, you may change the default subsystem behavior so that units are
always created without enabling connections. This provides more control in
granting appropriate access to specific connections.
The command syntax to disable is:
HSG> SET this/other Default_Access=Disable
The command syntax to enable is:
HSG> SET this/other Default_Access=Enable {default after
upgrade}
When the command is invoked from one controller, the Default_Access from
the other controller will be similarly modified. The setting is symmetrical and
persistent across restarts, FRUTIL, etc.
Restricting Host Access by Disabling Access Paths
If more than one host is on a link (that is, attached to the same port), host access
can be limited by enabling the access of certain host connections and disabling the
access of others. This is done through the ENABLE_ACCESS_PATH and
DISABLE_ACCESS_PATH switches of the ADD UNIT (or SET unit)
commands. The access path is a unit switch, meaning it must be specified for each
unit. Default access enables the unit to be accessible to all hosts.
For example:
In Figure 11, restricting the access of unit D101 to host 3, the host named
BROWN can be done by enabling only the connection to host 3. Enter the
following commands:
SET D101 DISABLE_ACCESS_PATH=ALL
SET D101 ENABLE_ACCESS_PATH=BROWN1B2
If the storage subsystem has more than one host connection, carefully specify the
access path to avoid providing undesired host connections access to the unit. The
default condition for a unit is that access paths to all host connections are enabled.
To restrict host access to a set of host connections, specify
DISABLE_ACCESS_PATH=ALL for the unit, then specify the set of host
connections that are to have access to the unit.
Enabling the access path to a particular host connection does not override
previously enabled access paths. All access paths previously enabled are still
valid; the new host connection is simply added to the list of connections that can
access the unit.