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EOV on output z/OS DFSMS Using Magnetic Tapes SC23-6858-00 |
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The system's EOV routine automatically switches volumes when one of the following EOV conditions occur:
This volume switching includes:
If a density or a version conflict occurs when the volume label is checked, a new label (Version 3 or Version 4) is written in the density or the version specified by the user. If any VOL2 - VOL9 or user volume labels (UVLs) exist, they are overwritten. If the original volume label is longer than 80 characters, the excess characters are truncated when the new volume label is written. When multiple tape units are used, the EOV routine checks to see if a next-plus-one volume is needed, and if the volume just written can be rewound and unloaded. If so, the EOV routine issues a message directing the operator to mount the next-plus-one volume on the tape unit just used. This is a premounting aid; the next-plus-one volume label is not verified at this time. This lookahead or parallel mounting results in an IEC501E mount message. Note: The IEC501E message has a type 2 descriptor code that
causes the message to be retained on the screen.
If you do not
want message retention, turn off the message retention attribute.
You can accomplish this by either:
For tape mounts, the IEC501E message remains on the screen until the mount is satisfied or until EOV has occurred on the previous volume. EOV deletes the IEC501E message and issues the IEC501A message. |
Copyright IBM Corporation 1990, 2014
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