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DVD+R DL (DL stands for Double Layer) also called DVD+R9, is a derivative of the DVD+R format created by the DVD+RW Alliance. Its use was first demonstrated in October 2003. DVD+R DL discs employ two recordable dye layers, each capable of storing nearly the 4.7 GB capacity of a single-layer disc, almost doubling the total disc capacity to 8.5 GB.
HD DVD-ROM, HD DVD-R and HD DVD-RW have a single-layer capacity of 15 GB, and a dual-layer capacity of 30 GB. HD DVD-RAM has a single-layer capacity of 20 GB. [72] Like the original DVD format, the data layer of an HD DVD is 0.6 mm below the surface to physically protect the data layer from damage.
The first 50 GB dual-layer Blu-ray Disc release was the movie Click, which was released on October 10, 2006. As of July 2008, over 95% of Blu-ray movies/games are published on 50 GB dual layer discs with the remainder on 25 GB discs. [10] 85% of HD DVD movies are published on 30 GB dual layer discs, with the remainder on 15 GB discs. [11] [12]
DVD-RAM discs can have 12 or 8 cm in diameter, around 5 or 3 inches respectively. The latter variant is mainly intended for camcorders that use DVD as storage media and also exists with capacities of 1.46 GB for a single-sided disc, 2.8 GB for a double-sided disc, and 5.6 GB for a dual-layer double sided disc, however, they are relatively uncommon.
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Both layers are accessible from the same side, but require the optics to change the laser's focus. Traditional single layer (SL) writable media are produced with a spiral groove molded in the protective polycarbonate layer (not in the data recording layer), to lead and synchronize the speed of recording head. Double-layered writable media have ...
In the last year and a half, many have spent a large portion of their budgets on GenAI, and they may have put other important areas of the IT footprint and data on the back burner and under-invested.
Though DVD drives seemed to have no difficulty reading single-layer discs, compatibility with dual-layer discs was problematic. 6.3.1.25 18 June 2004 Last version for Windows NT 4.0. [14] 6.6.0.8 17 February 2005 Added LightScribe support. 6.6.1.15c 31 July 2007 Last release of version 6. Nero Burning ROM 7 [15] 7.0.1.2 31 October 2005
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