HP StorageWorks XP Remote Web Console Software - Manual (Page 11)

External Storage XP user guide 11
1 External Storage XP for the XP10000/XP12000
Use External Storage XP to connect different types of HP or non-HP external storage devices (see ” Storage
devices that can be connected as external disk arrays ” on page 24) to an HP StorageWorks
XP10000/XP12000 disk array, and map and access Logical Units (LUs) on external devices as if they
were part of the XP10000/XP12000 array. You can create a “virtual” disk array, and use Command View
XP or XP Remote Web Console to easily administer and manage petabytes of external address space via
a single XP controller.
External Storage XP supports external storage LDEVs of any standard XP emulation type, such as OPEN-3,
OPEN-8, OPEN-9, OPEN-L, OPEN-K, or OPEN-V.
With the help of host mirroring middleware and/or Auto LUN XP, you can use External Storage XP for
online or offline data migration, providing a point-in-time copy of data between an external device and the
XP10000/XP12000 disk array.
Flex Copy XP is another HP StorageWorks XP product that copies user data between an existing LU on an
XP128, XP1024, XP10000, or XP12000 and an LU on an external storage device. For a detailed
description of Flex Copy XP, see the HP StorageWorks Flex Copy XP User Guide.
In this chapter, the original XP10000/XP12000 disk array is called the local disk array and the connected
disk array is called the external disk array. A volume managed in the local disk array is called an internal
XP LDEV, while an LU in an external disk array is called an external LU.
NOTE: Currently only the XP10000/XP12000 disk array can be used as the local disk array with
External Storage XP.
Mapping
Mapping means assigning XP10000/XP12000 Virtual Devices (VDEVs) and, consequently, Logical
Devices (LDEVs) and host port LUs to external LUs. If you map external LUs as internal XP10000/XP12000
VDEVs, you can use Command View XP or XP Remote Web Console to then assign the VDEV to an internal
CU:LDEV and a port/LU address. This allows you to operate an external LU as if it were an LDEV in the
local disk array.