Writing labels on new volume

The EOV routine handles label processing on the new volume (checking existing labels and writing new labels). The processing is the same as the open routine's handling of the first volume. The user exit for security verification may be taken, as described in Open/EOV user exit for security verification.

When positioning the second and subsequent volumes, the EOV routine does not use the data set sequence number. The EOV routine assumes that the data set continues at the beginning of the new volume.