HP StorageWorks XP10000 Disk Array - Manual (Page 48)

The host connects to the array without authentication of the host regardless of whether or not the host
is configured for authentication by host groups with CHAP.
In this case, although you do not need to register the host's user information on the host group,
you can register the user information.
NOTE:
You should register the user information for all hosts to be connected to a host group that performs
authentication of hosts. To allow a specific host to connect to such a host group without authentication,
configure the host group and the host as follows:
• On the host group:
Register the user information of the host you want to allow to connect without authentication, and then
disable the host authentication setting.
Figure 10 shows an example of authentication of hosts. In this figure, WWNs of host bus adapters (HBAs)
are abbreviated as a, b, and so on.
Figure 10 Example of authentication of hosts (Fibre Channel environments)
In Figure 10 , host group 1 performs authentication of hosts, but host group 2 does not.
Host A's user information is registered on host group 1, and the authentication setting is enabled.
Therefore, if the authentication of the host succeeds, Host A can connect to the array (or processing
goes to the authentication of the host group). As a precondition of successful authentication, configure
Host A for authentication by host groups with CHAP.
48 Overview of LUN Manager