HP StorageWorks HSG80 ACS Solution Software V8.8 for Linux X86 Installation and Configuration Guide (AA-RV1LA-TE, March 2005)
Planning a Subsystem
50 HSG80 ACS Solution Software V8.8 for Linux X86 Installation and Configuration Guide
Restricting Host Access by Offsets
Offsets establish the start of the range of units that a host connection can access.
For example:
In Figure 14, assume both host connections on port 2 (connections BLACK1B2
and BROWN1B2) initially have the default port 2 offset of 100. Setting the offset
of connection BROWN1B2 to 120 presents unit D120 to host BROWN as LUN 0.
SET BROWN1B2 UNIT_OFFSET=120
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