Blank compact discs for audio, video and data backup; blank compact discs read only memory CD-ROM; blank digital video discs read/write (DVD-RW); blank compact discs read/write (CD-RW); computer programs for improving the yield of writing or rewriting of CD-R/RW recorder DVD+RW/R recorder and DVD-RW/R recorder; computer firmware for improving the yield of writing or rewriting of CD-R/RW recorder, DVD+RW/R recorder and DVD-RW/R recorder