HP XP Racks - Manual (Page 8)

Multiple external storage systems can be connected to one external port. You can add an additional
external storage system even when the external port is already in use.
NOTE: Mapped external volumes must be accessed and copied only by hosts that are connected
to the HP XP7 Storage, not by hosts connected to the external systems.
Logical devices (LDEVs) are created during or after the mapping operation. If created after mapping,
the LDEVs are created in the same way they are when you create normal internal volumes using
Virtual LVI/Virtual LUN. As shown in the figure, LDEVs in mapped external volumes are required
for use in the local system.
Typical components
External Storage consists of the following components:
•
A HP XP7 Storage, referred to as the “local storage system”
•
External Storage license
•
An external storage system
•
An external volume mapped to the local system. In the local system, the mapped external
volume is referred to as an “internal volume”, and is a virtual representation of the external
volume.
•
LDEVs (logical devices).
•
Remote Web Console, RAID Manager, and/or HP Command Line Interface
•
External path
•
Mapping path
These components are illustrated in the following figure, and discussed in more detail below.
8 Overview