A DVD-RW disc is a rewritable optical disk with the exact same storage capacity as the DVD-R, typically 4.7GB. The smaller DVD-RW versions hold 1.4GB and are 8 cm in diameter. The format was released in 1999. The largest advantage of this technology is that is has the ability to be erase and re-write DVD’s. The leading industry experts suggest that the DVD’s can be rewritten up to a 1000 times, while maintaining the quality of the data, audio and pictures. These discs are most commonly used for volatile data such as computer backups or consolidation of files, but can also be used for DVD copying of movies. The format is also being frequently used for home video recorders. The biggest consumer advantage to this technology is that if there is an error while making a DVD copy, the disc is not ruined.

DVD-RW technology uses a special phase change metal instead of an organic dye to read and write information. This format is compatible with almost any personal computer drive and any home DVD player, making it easy to copy DVD’s and effectively use the information using your own technology. The competing format to DVD-RW is DVD+RW which allows for the disc to be rewritable. DVD-RW is slightly less competitive than the +RW format.

The largest competitor for this product is the DVD+R, since they are not compatible formats and some media players are compatible with only one. Be sure to evaluate your personal needs and current equipment before selecting the format that is best for you.