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

Figure 1 (page 8) illustrates a local array and an external array that are connected using XP
External Storage and Fibre Channel hardware. In Figure 1 (page 8) , the external array is connected
to the external port of the local array via a switch (or hub) using a Fibre Channel interface. External
is a local array port attribute used for XP External Storage. In
Figure 1 (page 8) , external LUs are
mapped as local array VDEVs and LDEVs and, consequently, as an LU.
NOTE: Do not access any external storage volume that is mapped as an XP External Storage
volume from a host connected directly to the external array. Also, do not access an XP External
Storage mapped external array volume using the external array's functions (for example, local
replication). After mapping an external LU as a local array volume, access the mapped external
LU only from the local array.
NOTE: Except on the MSA, a host can directly access external array volumes that have not been
mapped as local array volumes.
Figure 1 XP External Storage concept
8 Overview of connecting external arrays