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Positioning the volume to the data set z/OS DFSMS Using Magnetic Tapes SC23-6858-00 |
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When the tape is accepted for output, it is positioned to receive the new data set. Usually, the new data set is the first or only data set on the volume, so the tape is positioned at load point. To create a data set that follows another data set already stored
on the volume, specify a data set sequence number in the LABEL parameter
of the DD statement.
To position the tape, the system maintains a logical data set sequence number in the UCB. The method of positioning is the same as that previously explained for opening an input data set. No more than one data set on a tape volume can be open at a time. Processing is abnormally terminated if you attempt to open a second data set on the same volume. |
Copyright IBM Corporation 1990, 2014
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