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Dual-Layer DVD

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Dual-Layer DVD
Definition:

A Dual-Layer DVD differs from from a standard DVD by employing a second physical layer within the disc itself. A drive with dual layer capability accesses the second layer by shining the laser through the first semi-transparent layer.

Dual layer recording is available on DVD-R and DVD+R discs for storing significantly more data, up to 8.5 GB per disc, compared with 4.7 GB for single-layer discs.

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