Relationship to access methods
Use one of the following access methods with the DUMMY parameter:
- Basic sequential access method (BSAM)
- Virtual storage access method (VSAM)
- Queued sequential access method (QSAM)
- BDAM load mode (BSAM with MACRF=WL in the data control block)
If you use any other access method, the job is terminated.
Note: The ISAM/VSAM interface does not support the DUMMY parameter. For more information on
the ISAM/VSAM interface, see z/OS DFSMS Using Data Sets.