text: Figure 10-17 Selecting capacity setting 
  
  After the copies are fully synchronized, the original volume copy is deleted automatically. 
  
  As a result, compressed data is on the volume. This process is nondisruptive, so the data 
  remains online and accessible by applications and users. 
  
  This capability enables clients to regain space from the storage pool, which can then be 
  reused for other applications. 
  
  With the virtualization of external storage systems, the ability to compress stored data 
  significantly enhances and accelerates the benefit to users. This capability enables them to 
  see a tremendous return on their Storwize V7000 investment. 
  
  On the initial purchase of an Storwize V7000 with Real-time Compression, clients can defer 
  their purchase of new storage. When storage is needed, IT purchases a lower amount of the 
  required storage before compression. 
  
  For more information about volume migration for compressed volumes on standard pools to 
  DRPs, see “Migrating to and from DRP” on page 425. 