HP XP External Storage Software - Manual (Page 19)

Figure 4 External Storage Components
This section describes the details on the storage systems, cross-subsystem paths, volumes and mapping
paths as shown in the above figure.
Storage Systems and Cross-subsystem Paths
Before using External Storage, connect the Fibre Channel port of the local storage system to the external
storage system port with the fibre cable. The route between ports, which is connected with the cable, is
called the cross-subsystem path.
The Fibre Channel port of the local storage system is set to connect to the host by default. The Fibre
Channel port can be connected to an external storage system if you change the attribute of the Fibre
Channel port so that it is an external port, which can be connected to an external storage system. The
external storage system port can be a target port, which can be connected to a host.
To manipulate External Storage, you need to install External Storage by using the license key. Use your
Remote Web Console computer to access the local storage system via SVP (web server) and perform the
External Storage operations.
Volumes and Mapping Paths
Volumes in the external storage system (see C in Figure 4 on page 19) are called external volumes.
Mapping is necessary to manipulate an external volume from the local storage system. The system
administrator maps an external volume as an internal volume (see B in Figure 4 on page 19) in the local
storage system. After the mapping, you can manipulate the external volume from the local storage system
in the same way as manipulating an internal volume.
Note: When external volumes in external storage systems are mapped as internal volumes in your
storage systems, the external volumes can be accessed and copied by hosts connecting to your storage
systems, but not by hosts connecting to the external storage systems.
XP24000 External Storage Software User’s Guide 19