text: Capacity is saved when the data is written by the host because the host writes are smaller 
  when they are written to the storage pool. IBM RtC is a self-tuning solution that adapts to the 
  workload that runs on the system at any particular moment. 
  
  **10.5.2 Implementing RtC compression**
  
  To create a compressed volume, choose**Capacity Savings**-**Compressed**in the Create 
  Volumes window, as shown in Figure 10-16. For more information about creating volumes, 
  see Chapter 7, “Volumes” on page 241. 