text: For example, as shown in Figure 11-11 on page 450, a FlashCopy mapping was defined 
  between a source volume and a target volume with the**-incremental**option. Consider the 
  following points: 
  
  (cid:2) The mapping is started on Copy1 date. A*full copy*of the source volume is made, and the 
  bitmap is updated every time that a grain is copied. At the end of Copy1, all grains were 
  copied and the target volume is a replica of the source volume at the beginning of Copy1. 
  Although the mapping is stopped (thanks to the**-incremental**option), the bitmap is 
  maintained. 
  
  (cid:2) Changes are made on the source volume and the*bitmap is updated*, although the 
  
  FlashCopy mapping is not active. For example, grains E and C on the source are changed 
  in G and H, their corresponding bits are changed in the bitmap. The target volume is 
  untouched. 
  
  (cid:2) The mapping is started again on Copy2 date. The bitmap indicates that only grains E and 
  C were changed, so only G and H are copied on the target volume. There is no need to 
  copy the other grains, as they were already copied the first time. The copy time is much 
  quicker than for the first copy as only a fraction of the source volume is copied. 