However, as of March 2011, DL drives are up to twice as expensive as single-layer media. In 2005, the dual-layer versions of DVD-R appeared on the market. What is double layer DVD? In October 2003, it was demonstrated that double-layer technology could be used with a DVD+R disc, which began to be seen in the market in the middle of 2004 with prices comparable to those existing single-layer drives. They can be read on many DVD devices with less compatibility with older ones.

While DVD-R DL (DVD rewritable dual layer), also called DVD-R9, is a derivative of the DVD-R format standard.ĭVD±R dual-layer discs adopt 2 recordable dye layers with each capable of saving about 4.7 GB of data of a single-layer (SL) disc, almost doubling the total disc capacity to 8.5 GB. Dual Layer DVD±RĭVD+R DL (DVD recordable dual layer), also known as DVD+R9, is a derivative of the DVD+R format developed by the DVD+RW Alliance.

To learn the meaning of a dual-layer (DL) DVD, let’s look at the definition of the DVD+R DL and DVD-R DL.

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