Universal Volume Manager consists of several components, including:
- A local storage system
- VSP 5000 series
- VSP E series
- One or more external storage
systems
The local storage system can connect to various external storage systems. Hosts recognize the volumes in these external storage systems as internal volumes of the local storage system.
- External volumes
A volume in an external storage system that is mapped to the local storage system is referred to as a mapped external volume. After an external volume is mapped, it is used as an internal volume, which is a virtual representation of the external volume.
- Internal volumes
A volume managed by the local storage system. An internal volume can be a physical volume or the virtual representation of an external volume.
- Logical devices (LDEVs)
- External path
Before using Universal Volume Manager, connect a cable from a port on the local storage system to a port on the external storage system. The route between the ports with the cable connection is referred to as an external path.
If the external storage system is connected by using an iSCSI interface, make sure to use a port on the 10 Gbps iSCSI channel board. A port on the 25 Gbps iSCSI channel board cannot be used for the iSCSI connection between the storage systems.
- Mapping path
This figure provides an overview of these components.
For VSP E series:
For VSP 5000 series:
