text: **Note:**Do not create Data Reduction Pools with small extent sizes. See the following alert: 
  http://www.ibm.com/support/docview.wss?uid=ibm10718413 
  
  For more information about differences between standard pools and Data Reduction Pools, 
  and for extent size planning, see Chapter 3, “Planning” on page 43. 
  
  If an encryption license is installed and enabled, you can additionally select whether the 
  storage pool is encrypted, as shown in Figure 6-7. The encryption setting of a storage pool is 
  selected at creation time and cannot be changed later. By default, if encryption is enabled, 
  encryption is selected. For more information about encryption and encrypted storage pools, 
  see Chapter 12, “Encryption” on page 603. 