DVD-R DL (DL stands for Dual Layer), also called DVD-R9, is a derivative of the DVD-R format standard. DVD-R DL discs hold 8.5 gigabyte (GB) by utilizing two recordable dye layers, each capable of storing a little less than the 4.7 GB of a single layer disc, almost doubling the total disc capacity.
DVD-R DL (DL stands for Dual Layer), also called DVD-R9, is a derivative of the DVD-R format standard. DVD-R DL discs hold 8.5 gigabyte (GB) by utilizing two recordable dye layers, each capable of storing a little less than the 4.7 GB of a single layer disc, almost doubling the total disc capacity.
Source: Wikipedia "DVD-R DL" · CC BY-SA 4.0
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