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cd udf

Even though both CD and DVD disks have the same media size and shape, the things they have in common ends there. By reducing the wave length of the laser to 625mm or more infrared light, DVD technology has managed to write in smaller pits when compared to the standard technology of CD. This will allow for a greater amount of data per track on the DVD. The tracks of a DVD are narrower as well, which allows for more tracks per disc, which also translates into more capacity than a CD. The avaerage single layer DVD holds 4.5 GB of data, while a CD holds a mere 700 MB. Layers As stated above, a DVD has smaller pits and the lasers need to focus on them. Data access speed DVDs will access data at a much faster rate than a CD can. The average 32X CD-ROM drive reads data at 4MB a second, while a 1X DVD drive reads at 1.38MB a second. Universal data format The recording formats of CDs and DVDs are quite different, as DVDs use UDF, or the Universal Data Format.
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