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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. Discs can be read in many DVD devices (older units are less compatible) and can only be created using DVD+R DL and Super Multi drives.
DVD-R DL (DL stands for Dual Layer [1]), also called DVD-R9, is a derivative of the DVD-R format standard. DVD-R DL discs hold 8.5 GB by utilizing two recordable dye layers, each capable of storing a little less than the 4.7 gigabyte (GB) of a single layer disc, almost doubling the total disc capacity. [2]
DVD-R DS (DS stand for Double Side) is also called DVD-10 (Dual Side, Single Layer) or DVD-18 (Dual Side, Dual Layer), it is a sub category of DVD-R. A DVD-R DS has a storage capacity of 8.75 GB (DVD-10) or 15.9 GB (DVD-18).
DVD-R: WORM DVD defined by the DVD Forum; DVD-RW: rewritable DVD defined by DVD Forum; DVD+R: WORM DVD defined by the DVD+RW Alliance; DVD+RW: rewriteable DVD defined by DVD+RW Alliance; DVD-RAM rewriteable, capable of random write access, not generally format-compatible with DVD; Blu-ray Disc: DVD successor, capable of high-definition video [1]
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]
The DVD-R format was developed by Pioneer in 1997. [4] It is supported by most normal DVD players and is approved by the DVD Forum. It has broader playback compatibility than DVD+R, especially with much older players. [citation needed] The dash format uses a "land pre-pit" method [5] to provide sector address information.
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As the length of a file's extent on disc is stored in a 32 bit value, [20] it allows for a maximum length of just over 4.2 GB (more precisely, one byte less than 4 GiB). It is possible to circumvent this limitation by using the multi-extent (fragmentation) feature of ISO 9660 Level 3 to create ISO 9660 file systems and single files up to 8 TB.