text: (cid:2) Clone: Sometimes referred to as*full copy*. A point in time copy of a volume with 
  
  background copy of the data from the source volume to the target. All blocks from the 
  source volume are copied to the target volume. The target copy becomes a usable 
  independent volume. 
  
  (cid:2) Backup: Sometimes referred to as*incremental*. A backup FlashCopy mapping consists of 
  a point in time full copy of a source volume, plus periodic increments or “deltas” of data 
  that changed between two points in time. 
  
  The FlashCopy mapping has four property attributes (*clean rate*,*copy rate*,*autodelete,*
  *incremental*) and seven different states that are described later in this chapter. Users can 
  perform these*actions*on a FlashCopy mapping: 
  
  (cid:2) Create: Define a source and target, and set the properties of the mapping. 
  
  (cid:2) Prepare: The system needs to be prepared before a FlashCopy copy starts. It basically 
  flushes the cache and makes it “transparent” for a short time, so no data is lost. 
  
  (cid:2) Start: The FlashCopy mapping is started and the copy begins immediately. The target 
  volume is immediately accessible. 
  
  (cid:2) Stop: The FlashCopy mapping is stopped (by the system or by the user). Depending on 
  the state of the mapping, the target volume is usable or not. 
  
  (cid:2) Modify: Some properties of the FlashCopy mapping can be modified after creation. 
  
  (cid:2) Delete: Delete the FlashCopy mapping. This action does not delete volumes (source or 
  target) from the mapping. 