If you are changing the definitions of management classes, you
should know when the new definitions will take effect. DFSMShsm retrieves
a list of all currently defined management classes before the following
functions begin:
- Automatic volume space management, which includes primary space
management and interval migration
- Automatic secondary space management
- Command volume space management
If one of the volume functions is in progress or has just completed,
and another volume function is about to begin, DFSMShsm uses the list
of management classes that exists from the prior processing. When
secondary space management begins, a list of management classes is
retrieved from the active SMS configuration and is not shared with
the other functions in the preceding list.
When DFSMShsm begins automatic volume space management, it retrieves
the storage group definitions to determine which SMS-managed volumes
are eligible for space management.
A storage group must meet the following criteria for DFSMShsm to
consider it for processing:
- It must be type POOL.
- It must have a status of either ENABLED, QUIESCED NEW, or DISABLED
NEW.
- It must have AM=Y, AM=I, or AM=P.