End of Volume (EOV)

The EOV macro instruction identifies end-of-volume (EOV) and end-of-data-set conditions. For an end-of-volume condition, EOV causes switching of volumes and verification or creation of standard labels. For an end-of-data-set condition (except when another data set is concatenated), EOV causes your end-of-data-set routine to be entered. When using XDAP, issue EOV if switching of direct access volumes is necessary or if secondary allocation is to be performed for a direct access data set opened for output. For details about the parameters of the EOV macro instruction, see Handling End of Volume and End-Of-Data-Set Conditions.

Note: Should EOV call DADSM EXTEND to extend on the same volume or a new volume (which implies DASD output), EXTEND will issue an enqueue on SYSVTOC. If the EOV request is issued for a data set on a volume where the application already holds the SYSVTOC enqueue, this will cause abnormal termination. For this case, a circumvention would be to allocate the output data set large enough to not require a secondary extent or request the output data set be on a volume that is different than the one for which it holds the SYSVTOC enqueue.