This required
parameter specifies the name of an installation exit point. Valid
values are: - IEF_VOLUME_ENQ for the volume ENQ installation exit
- IEF_VOLUME_MNT for the volume mount installation exit
- IEF_SPEC_WAIT for the specific waits installation exit
- IEF_ALLC_OFFLN for the allocated/offline device installation exit.
See z/OS MVS Installation Exits for
information about the individual exits.