HP StorageWorks External Storage XP user guide (T1706-96006, June 2006)

External Storage XP user guide 39
Using external LUs for Auto LUN XP operations
Figure 14 shows an example of using an external LU for Auto LUN XP operations. The mapped external
LU is set as the source volume, and the local array internal LDEV is set as the target volume. Existing data
in the external LU is (in effect) manually migrated to the internal LDEV on the local array using Auto LUN
XP. For more information, see the HP StorageWorks Auto LUN XP user guide for the
XP12000/XP10000/SVS200.
Figure 14 Example of Auto LUN XP operations
1. Use External Storage XP to map a volume in the external array to an internal LDEV of the local array.
For this example, set the following attributes for the mapped LU:
• Emulation type: OPEN-V
• IO Suppression mode: Disable
For more information, see ”Mapping external LUs (Add LU)” on page 73.
CAUTION: To migrate existing data in the mapped external LU to a local array volume using Auto
LUN XP or Business Copy XP, as shown in Figure 14, set the local array’s emulation type to
OPEN-V when mapping the LU. Only OPEN-V emulation can be used to read existing data in the
external LU from the local array side.
To copy existing data in the mapped external LU using HP StorageWorks software products, such
as Continuous Access XP and Business Copy XP, the mapped external LU’s emulation type must
also be OPEN-V.
2. Prepare a local array internal LDEV with the same capacity as the mapped external LU. Use Volume
Manager to adjust the internal LDEV’s capacity as required. For instructions, see the HP StorageWorks
LUN Configuration and Security Manager XP user guide for the XP12000/XP10000/SVS200.
CAUTION: The emulation type of the local array’s prepared internal LDEV must be OPEN-V.
3. Set the mapped external LU as the source volume, and set the local array internal LDEV as the target
volume.
4. Use Auto LUN XP to manually migrate existing data in the mapped external LU to the local array
internal LDEV (without changing the associated LDEV/LU).
Using external LUs for Continuous Access XP operations
Figure 15 shows an example of using an external LU for Continuous Access XP operations. The mapped
external LU is set as the Continuous Access XP pair’s S-VOL, and the volume in the local array that is
connected as the MCU is set as the Continuous Access XP pair’s P VOL. For more information about