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FREEVOL parameter z/OS MVS JCL Reference SA23-1385-00 |
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Parameter type: Keyword, optional Purpose: Use the FREEVOL parameter to specify whether to allow other jobs to read freed volumes of a multivolume tape file as the volume is dismounted by the job. Note: When multiple DD statements in JOB1 specify one or
more of the same volume serial numbers, and also FREEVOL=EOV, it becomes
possible for JOB2 to obtain the ENQ on the volume serial number and
begin processing as soon as JOB1 releases the ENQ. This results in
JOB1 abending when attempting to process a subsequent DD with the
same volume serial number, because the volume is no longer available
to JOB1. In addition, FREEVOL=EOV has no effect on the allocation
requirement that all specified volume serial numbers be available
for enqueue; if any are not available, allocation issues IEF235D and
waits for volume availability or for the job to be cancelled.
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