What is the difference between DVD-R Authoring and DVD-R General (Purpose)?
DVD-R General drives record DVD-R media at 650 nm*, while DVD-R Authoring drives record DVD-R media at 635 nm*. Therefore, a DVD-R Authoring disc cannot be written on a drive that specifies DVD-R General media (650 nm), and vise versa. *wavelength of the record laser • Why are there two types of DVD-R media? The DVD Forum made this decision. Originally, the 635nm laser wavelength was selected to achieve the eventual capacity goal of ~5.0 GB per DVD-R disc. The first step was the development of DVD-R, Version 1.0 that provided a 3.95 GB disc and 635 nm drive. In response to growing demand for higher capacity, the 4.7 GB disc was released, using the 635 nm technology, as Version 1.9. Meanwhile, the 650 nm lasers were being developed. Today, they offer lower cost and wider temperature operating ranges. The DVD Forum expects these features to broaden the use of DVD-R recorders in the consumer (versus professional) markets. Now there are Version 2.0 DVD-R media and drives on the market. Ver
