text: **Note:**The bitmap is not updated in this case. Otherwise, it might be copied from the 
  source later if a background copy is ongoing or if write operations are made on the source. 
  That process overwrites the changed grain on the target. 
  
  **Read from a target volume**
  Performing a read operation on the target volume returns the value in the grain on the source 
  or on the target, depending on the bitmap: 
  
  (cid:2) If the bitmap indicates that the grain was copied from the source or that the grain was 
  modified on the target, the grain on the target is read, as shown in Figure 11-9. 
  
  (cid:2) If the bitmap indicates that the grain was not yet copied from the source or was not 
  modified on the target, the grain on the source is read, as shown in Figure 11-9. 