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growisofs -M /dev/dvd -D -J -R -quiet -new-dir-mode 0755 -graft-points `date "+%Y-%m-%d-%H-%M"`=/root
Also useful if you wish to remake a RW DVD with your own default setting.
two lines below will do it.
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growisofs -Z /dev/dvd -D -J -R -b isolinux.bin -c boot.cat -no-emul-boot -boot-load-size 4 -boot-info-table /livecd/
growisofs -M /dev/dvd -D -J -R -quiet -new-dir-mode 0755 -graft-points `date "+%Y-%m-%d-%H-%M"`=/root
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dvd+rw-format -blank /dev/dvd
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dvd+rw-format -blank=full /dev/dvd
or to reset media type back from unfriendly DAO only mode my new DL-DVD-burner trys to write everything!