text: **Overview of a FlashCopy sequence of events:**The following tasks show the FlashCopy 
  sequence: 
  
  1. Associate the source data set with a target location (one or more source and target 
  volumes). 
  
  2. Create a FlashCopy mapping for each source volume to the corresponding target 
  volume. The target volume must be equal in size to the source volume. 
  
  3. Discontinue access to the target (application dependent). 
  
  4. Prepare (pre-trigger) the FlashCopy: 
  
  a. Flush the cache for the source. 
  b. Discard the cache for the target. 
  
  5. Start (trigger) the FlashCopy: 
  
  a. Pause I/O (briefly) on the source. 
  b. Resume I/O on the source. 
  c. Start I/O on the target. 