HP XP External Storage Software - Manual (Page 50)

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 Continuous Access XP operations, see the HP StorageWorks Continuous Access
XP user guide for the XP12000/XP10000/SVS200.
Figure 15 Example of Continuous Access XP operations
1. Use External Storage XP to map a volume in the external array to an internal LDEV of the local
Continuous Access XP RCU array.
CAUTION:
Set the IO Suppression mode to Disable.
Select the mapped volume's emulation type as required. If you select an open-system emulation
type (such as OPEN-V), go to step 2. If you select a mainframe-system emulation type (such as
3390-3), go to step 3.
For more information, see Mapping external LUs (Add LU) .
2. If you set an open-system emulation type when mapping the volume, the mapped volume's status
automatically becomes Normal. However, the volume-formatting process is not automatically
executed. To optionally format the mapped volume, use the Custom Volume Size (CVS) function.
For instructions, see the HP StorageWorks LUN Configuration and Security Manager XP user
guide for the XP12000/XP10000/SVS200.
Go to step 4.
3. If you set a mainframe-system emulation type when mapping the volume, the mapped volume's
status becomes Blockade. To format the volume, use the CVS function. To restore the volume,
Preparing for External Storage XP operations 50