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Tape disposition z/OS DFSMS Using Magnetic Tapes SC23-6858-00 |
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Tape disposition at the end of the data set or volume can be affected by the DISP parameter of the DD statement. This implied disposition can be overridden by a positioning parameter of the OPEN, FEOV, or CLOSE macro. The OPEN macro controls positioning after an end-of-volume condition (multivolume data sets), unless overridden by the FEOV macro. The CLOSE macro controls positioning at the end of the data set. The positioning parameters of the OPEN, FEOV, and CLOSE macro instructions
are:
The CLOSE macro has the following additional operand that allows
you to release tape data sets and the volumes on which they reside:
DISP is the default. If necessary, the specified volume disposition can be overridden by the system. However, you need not be concerned; the system automatically requests the mounting and demounting of volumes depending on the availability of devices at a particular time. |
Copyright IBM Corporation 1990, 2014
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