text: The only reason to stop a FlashCopy mapping is for incremental FlashCopy. When the first 
  occurrence of an incremental FlashCopy is started, a full copy of the source volume is made. 
  When 100% of the source volume is copied, the FlashCopy mapping does not stop 
  automatically and a manual stop can be performed. The target volume is available for read 
  and write operations, during the copy, and after the mapping is stopped. 