Label processing for output files

Just as for input files, the volume and file header labels must be checked for output files. If the new file is the first file on a previously unused tape, the volume and file header labels (VOL1, HDR1, HDR2) were written during initialization of the tape.

Label processing depends – as for input files – on the LABEL specification in the FILE macro or the FCB, or on the LABEL-TYPE operand in the ADD-FILE-LINK command.