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> NOTES
> If  the  media  already  carries isofs and growisofs is invoked with -Z
> option non-interactively, e.g. through cron, it shall fail with "FATAL:
> /dev/dvd  already carries isofs!" Note that only ISO9660 is recognized,
> you can perfectly zap e.g. an UDF filesystem non-interactively.
> *** Man page extract end***