HP StorageWorks XP Remote Web Console Software - Manual (Page 8)

A host group can only contain hosts that are connected to the same port, and cannot contain hosts
that are connected to different ports. For example, if two Windows hosts are connected to port
1A and three Windows hosts are connected to port 1B, you cannot register all five Windows hosts
in one host group. You must register the first two Windows hosts in one host group and then register
the remaining three Windows hosts in another host group.
After server hosts are classified into host groups, you must associate host groups with logical
volumes. In
“LU Paths Configuration in a Fibre Channel Environment” (page 8) , the host group
hg-lnx is associated with three logical volumes (00:00:00, 00:00:01, and 00:00:02). LU paths
are defined between the two hosts in the hg-lnx group and the three logical volumes.
Figure 1 LU Paths Configuration in a Fibre Channel Environment
Use LUN Manager to define paths between a single server host and multiple LUs. In “LU Paths
Configuration in a Fibre Channel Environment” (page 8) , each of the two hosts in the host group
hg-lnx is able to access the three LUs.
Use LUN Manager to define paths between multiple server hosts and a single LU. In “LU Paths
Configuration in a Fibre Channel Environment” (page 8) , the LU identified by the LDKC-CU-LDEV
number 00:00:00 is accessible from the two hosts that belong to the hg-lnx host group.
In “LU Paths Configuration in a Fibre Channel Environment” (page 8) , the LUs associated with
the hg-lnx host group are addressed by numbers 0000 to 0002. The address number of an LU is
referred to as LUN (logical unit number). When HP StorageWorks XP Continuous Access Software
and other program products manipulate LUs, the programs use LUNs to specify the LUs to be
manipulated.
8 About LUN Manager Operations