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

Planning a Subsystem
41HSG80 ACS Solution Software V8.8 for OpenVMS Installation and Configuration Guide
Note: The procedure of restricting access by enabling all access paths then disabling
selected paths is not recommended because of the potential data/security breach that
occurs when a new host connection is added.
Restricting Host Access in Multiple-Bus Failover Mode
In multiple-bus mode, the units assigned to any port are visible to all ports. There
are two ways to limit host access in multiple-bus failover mode:
■ Enabling the access path of selected host connections
■ Setting offsets
Enabling the Access Path of Selected Host Connections
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. Access path is a unit switch, meaning it must be specified for each
unit. Default access means that the unit is accessible to all hosts. It is important to
remember that at least two paths between the unit and the host must be enabled in
order for multiple-bus failover to work.