HP Array Controller HSG V8.7 Software - Manual (Page 109)

Creating Storagesets 3–31
By default, host access is set to ALL. If you wish to have the unit
access limited, you must first disable access to ALL, then set it to a
specified host access path.
You can define a unit’s access privileges with the ADD command.
These access privileges can be changed using the SET command. See
Appendix B, “CLI Commands,” for more information about these
commands.
Also, see Chapter 2, “Configuring an HSG80 Array Controller,”for
configuration rules and requirements that you should consider when
setting up and working in a multiple host environment.