AfterDawn: Glossary


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A propietary recordable DVD format, developed by DVD+RW Alliance. Format currently (10/2003) allows single-layer data to be stored on each side of the disc -- in other words, one side of the disc can hold upto 4.38 gigabytes of information (NOT 4.7GB what the disc labels claim -- 4.7GB is achieved by tweaking the numbers and using 1,000 in calculations between megabyte and gigabyte, when the correct number to be used should be 1,024).

Dual-layer discs that can hold 8.5GB entered the market in Q2/2004. However, dual-layer discs can't be burned using the old DVD+R writers that support only single-layer burning (==all DVD+R capable burners made before 2004 or so).

Single layer discs pose a problem when backing up pressed DVD-Video discs that can hold dual-layer worth of data per side, 8.5GB. Those discs need to be split to two DVD+R discs if all the information has to be preserved from the original disc.

DVD+R is technically slightly more advanced than its competitor, DVD-R, but DVD-R still leads DVD+R by rather wide margin in terms of blank media sales.

Both, DVD+R and DVD-R, formats are write-once formats. DVD+R's "sister format" is called DVD+RW which is essentially a re-writable version of DVD+R. DVD-R's sister format is called DVD-RW.

All most common recordable DVD formats, DVD+R, DVD+RW, DVD-R and DVD-RW can be read with most stand-alone DVD players and with virtually all DVD-ROM drives.



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