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The DVD-R 1. A wobbled groove is used to provide clocking data, with marks written in both the groove and the land between grooves. The grooves and pre-embossed sector headers are molded into the disc during manufacturing. There are two types of cartridges: type 1 is sealed, type 2 allows the disc to be removed.
Discs can only be written while in the cartridge. Double-sided DVD-RAM discs were initially available in sealed cartridges only, but now come in removable versions as well. Cartridge dimensions are DVD-RAM can be rewritten more than , times, and the discs are expected to last at least 30 years.
It appeared in the U. The instant access and on-the-fly editing and deleting capabilities of the DVD camcorders are impressive. It became available in late Many current DVD players and recorders support the format, but as previously mentioned, if you have a decade-old player, you will probably have some trouble.
In the end, it's a decision between price and capacity; do you or do you not need to record 8 hours of DVD-quality video? The benefit of these discs is, of course, the ability to record and re-record data to the disc.
This is particularly useful if you're recording a television program from week to week. Think of this possibility: an inquisitive family member or friend accidentally deletes the precious and only video recording of your trip to Singapore.
This is ironically the oldest and the least compatible of all the DVD formats. Developed in , the format has had a larger presence with camcorders and set-top boxes because of the fact that data can be easily and randomly written to and erased from the disc, allowing for extensive editing.
The discs also have a longer life expectancy--as much as 30 years--and some of them come enclosed in a protective case, making the format highly reliable for backing up data. They are, however, the least compatible and most expensive DVD format out there. Be respectful, keep it civil and stay on topic.
Buying Blank Discs. Recordable Disc Compatibility. Use the Best Record Mode. What It All Means for You. Since prices vary according to brand or package quantity, no costs will be quoted here.
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