What should I consider when buying a DVD unit?

DVD units are available at many different speeds with different options and formats. The main factor to be considered when buying a DVD unit is its purpose. The DVD unit is usually designed to play DVD movies and sound CDs as well as reading DVD-ROM and CD-ROM discs.

Consumers who are interested in getting more advanced DVDs will have to consider other options such as burners, units that support DVD-R technology, and units that support DVD+R. The only difference between these two formats is the way the DVD unit determines the position of the laser on the disk. DVD-R discs are read by DVD through special grooves on the disk known as Prepits , while DVD+R measures wobble frequency . The consumer can also buy a "dual-DVD" unit that supports DVD-R and DVD+R, usually known as DVD ± r.

DVD-R format, which was introduced in 1997, was the first to hit the market. DVD-R is written, readonly an optical disk that allows the user to copy movies or data with a capacity of 4.37 GB using a DVD unit. DVD-RW format can be written and overwritten several times.

The DVD-R format was divided into two types for safety reasons in 2000. These types are DVD-R for creating or DVD-R (A) and DVD-R for general or DVD-R (g). Although these DVD-R types can read each other, they cannot write in the second format.

In 2002, Sony and Phillips introduced DVD+R format. All DVD+R formats are compatible with each other. DVD+R has the same capacity as DVD-R and DVD+RW works exactly like DVD-RW. This format also offers DVD+RW DL. Dl It means dual layer , technology that allows one disk to hold up to 8.5 GB of information. DVD-RAM offers more storage capacity, but requires a specialized DVD unit that is more expensive.

The format of the DVD-RAM lets the disk be rewritten with the DVD isDnot up to 100,000 times compared to only 1,000 times for average DVD-RW. It can be double-sided, allowing up to 9.74 GB per DVD-RAM. This disk is best for users with bulk portable storage needs.

Drive "Dual DVD" or DVD ± R with DVD-RAM is very versatile because it reads all DVD technology formats and is able to write in all forms. The user usually reaches 16x writing for DVD +/-, 8x WRITE for DVD + DL and 5x WRITE for DVD-RAM, as well as the ability to write regular CD-R at 48x with this type of DVD unit. This ensures that any disk format will work when using DVD Drive.

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