text: No trial licenses for encryption exist on the basis that when the trial runs out, the access to 
  the data is lost. Therefore, you must purchase an encryption license before you activate 
  encryption. Licenses are generated by IBM Data storage feature activation (DSFA) based on 
  the serial number (S/N) and the machine type and model (MTM) of the control enclosure. 
  
  You can activate an encryption license during the initial system setup (on the Encryption 
  window of the initial setup wizard) or later on, in the running environment. 
  
  Contact your IBM marketing representative or IBM Business Partner to purchase an 
  encryption license. 