The technology, co-developed by drive maker Philips, and media specialists Verbatim and Mitsubishi Kagaku, adds a second recording layer to a standard-thickness DVD+R disc, taking the medium's capacity from 4.7GB to 8.5GB. That's enough for four hours of DVD-quality material, 16 hours of VHS-quality content or two hours' archive footage. The discs are playback-compatible with existing DVD players and DVD-ROM drives. Initial products will offer a write speed of 2.4x.
this means perfect 1:1 backups
but this means buying new hardware again
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