DVD-R stands for DVD Recordable and DVD-RW for DVD re-writeable.
There are three DVD recording standards. DVD-R/DVD-RW and
DVD+R/DVD+RW have similiar features and are compatible with
many stand-alone DVD players and most DVD-ROMs. DVD-RAM has
less DVD Player and DVD-ROM compatibility but better recording
features.
DVD-R and DVD-RW
DVD-R was the first DVD recording format
released that was compatible with stand-alone DVD Players.
DVD-R is a non-rewriteable format
and it is compatible with about 93% of all DVD Players
and most DVD-ROMs.
DVD-RW is a rewriteable format
and it is compatible with about 80% of all DVD Players
and most DVD-ROMs.
DVD-R and DVD-RW supports single side
4.37 computer GB* DVDs (DVD-5) and double sided 8.75 computer
GB* DVDs ( DVD-10).
DVD+R and DVD+RW
DVD+R is a non-rewritable format
and it is compatible with about 89% of all DVD Players
and most DVD-ROMs.
DVD+RW is a rewritable format
and is compatible with about 79% of all DVD Players
and most DVD-ROMs.
DVD+R and DVD+RW supports single side
4.37 computer GB* DVDs (DVD-5) and double side 8.75 computer
GB* DVDs (DVD-10).
DVD+R DL
DVD+R DL (DVD+R9) is a Dual Layer writeable
DVD+R. The dual layered discs can hold 7.95GB (DVD-9) and
dual layered double sides 15.9GB (DVD-18).
DVD-R DL
DVD-R DL (DVD-R9) is a Dual Layer writeable
DVD-R. The dual layered discs can hold 7.95GB ( DVD-9) and
dual layered double sides 15.9GB (DVD-18).
DVD-RAM
DVD-RAM has the best recording features
but it is not compatible with most DVD-ROM drives and DVD-Video
players. DVD Ram is considered a highly reliable format,
as the discs have built-in error control and a defect management
system. Therefore, DVD-RAM is perceived to be superior to
the other DVD technologies for traditional computer tasks
such as general data storage, backup and archivingl.