HP StorageWorks XP24000/XP20000 for FlashCopy Mirroring Software User Guide (T5240-96012, May 2011)

Figure 20 Performing Reverse Restore after Incremental FlashCopy Function is Used
Fast Reverse Restore Function
The Fast Reverse Restore function allows you to simplify data recovery in a time of disaster. This
recovery function reverses the original S-VOL and T-VOL relationship established by the Version 2
relationships function. This reversal re-establishes the relationship, with the data flowing in the
opposite direction. However, you cannot perform the Fast Reverse Restore function in the following
cases:
• If the relationships to be reversed include a relationship established with multiple volumes
• If the S-VOL capacity exceeds the T-VOL capacity in the relationship to be reversed
• If the original relationship was re-established using the Fast Reverse Restore function
• If the S-VOL or the T-VOL is an external volume.
You can perform the Fast Reverse Restore function on a relationship established in NOCOPY mode
or on a relationship undergoing the copy process. If you perform the Fast Reverse Restore function
while undergoing copy processing, the copy process will end.
After you re-establish a relationship using the Fast Reverse Restore function, the contents of the new
S-VOL are not guaranteed.
40 About Version 2 Operations