Compaq StorageWorks HSG60 ACS Solution Software V8.6 for Compaq Tru64 UNIX Installation and Configuration Guide

Planning a Subsystem 1–23
Host BROWN cannot see units lower than its offset, so it cannot access units D100 and
D101. However, host BLACK can still access D120 as LUN 20 if the operating system
permits. To restrict access of D120 to only host BROWN, enable only host BROWN’s
access, as follows:
SET D120 DISABLE_ACCESS_PATH=ALL
SET D120 ENABLE_ACCESS_PATH=BROWN1B2
NOTE: It is highly recommended that you still give access to only specific connections, even if
there is just one connection on the link. That way, if new connections are added, they will not
have automatic access to all units.
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
Restricting Host Access by Disabling Access Paths
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