DFSMShsm retrieval of management classes

If you are changing the definitions of management classes, you must know when the new definitions will take effect. When DFSMShsm begins automatic availability management or availability management from a volume command, it retrieves a list of all currently defined management classes before it begins processing unless volume-type processing is operating or has just completed. Volume-type processing consists of the following functions:
  • Automatic backup
  • BACKVOL command

If volume-type processing is in progress or has just been completed when a new volume-type processing is to begin, DFSMShsm uses the list of management classes that exists from the prior processing. If you are changing the management classes, DFSMShsm must complete its volume-type processing before you can expect the changes in the management classes to become effective.