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What are HD DVD-ROM/DVD-ROM Combo and Twin discs?

April 26, 2017Combo discs DVD-ROM HD Twin

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What are HD DVD-ROM/DVD-ROM Combo and Twin discs?

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HD DVD Combo and Twin discs bring together prerecorded HD DVD-ROM and DVD-ROM physical formats in a single disc. These combination discs are possible because both formats share many physical characteristics (radius, thickness, spiral and rotational directions, etc.) but with important differences (data read using different wavelength lasers, etc.).