as title?

 

and whats the difference between DVD -R / +R and ROM?

 

RAM = Random Access Memory
ROM = Read Only Memory

you have RAM in your PC as the content of the RAM can and does change, however a DVD is solid state and you cant change it hence a DVD is ROM

DVD-R and DVD-RW
DVD-R/W was the first DVD recording format released that was compatible with standalone 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/W supports single side 4.37 computer GB* DVDs(called DVD-5) and double sided 8.75 computer GB* DVDs(called DVD-10).
These formats are supported by DVDForum.

DVD+R and DVD+RW
DVD+R/W has some "better" features than DVD-R/W such as lossless linking and both CAV and CLV writing.
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/W supports single side 4.37 computer GB* DVDs(called DVD-5) and double side 8.75 computer GB* DVDs(called DVD-10).
These formats are supported by the DVD+RW Alliance.

 

I know what ram is... ta... but i also wondered what the importance of RAM is?

cheers

 

Yeah what Andy said.

 

More ram you have the faster applications work, in essence a minimum of 512 of ram if required to run XP, if gaming is your forte then 1024 is batter.

 

soulweavers,

i think you mis read my question mate

 

I dont think anyones actually answered sapphymikes question.

DVD ram is another form of DVD media, its not the same as DVD+/-R/W

You would need a DVD RAM drive and DVD RAM media to use. DVD +/- RW writers generally dont support DVD RAM media.

As for the difference in DVD RAM and DVD+/-R I dont have a clue! lol

 

just to add, DVD RAM is usually housed in a cartridge rather than a plain DVD disc.

 

PRODUCTS: Standards

120 Forum Members Set DVD Standards

The DVD Consortium (later renamed DVD Forum) was formed to hammer out a single standard. The consortium consisted of Matsushita, Mitsubishi, Pioneer, Philips, Hitachi, JVC, Sony, Thompson, Toshiba and Times Warner. Monitored closely by the entertainment and computer industry alliances, the Consortium developed the DVD-ROM standards that would provide 4.7GB capacity on a single-sided disc and would enable read-compatibility with existing CD-ROM, CD-R and CD-RW media.

The DVD Forum membership, which included content developers and other interested parties, established several working groups to attack a broad range of issues, including recordable (write-once, read-many) and rewriteable media requirements. These requirements included:

A single format for computer, TV-based applications
Backward read compatibility with current CD technology
Forward read compatibility with future R/W and WORM discs
Single file system for all content and disc media types
Low cost
No mandatory container
Reliable data storage and retrieval
High on-line capacity
High performance for sequential, non-sequential data

Following a three-month evaluation of drive and media compatibility by more than 20 personal computer and storage media manufacturers from around the world, the DVD Forum unveiled the DVD-R and DVD-RAM standards in 1997. Since then, the DVD-RAM standard has been adopted by the Japanese Industrial Standard (JIS) and the European Computer Manufacturer's Association (ECMA) and is being reviewed by ISO (International Standards Organization).

The present DVD-RAM standard provides 2.6GB of single-sided storage capacity; read compatibility with DVD-ROM, DVD-R, CD-ROM, CD-R and CD-RW media and a road map for regular capacity increase milestones. In addition to providing fast data access, the initial products already provide very low-cost storage solutions (2.6GB single-sided media provides a storage cost of only .009˘/MB and double-sided 5.2GB media provides a storage cost of only .008˘/MB).

they look like this




Hope this answers your question ..

 

DVD RAM allows you to ERASE data from the disk so hence the RAM so its like your HD / Floppy Disk, there is a limit to the number of times that you can erase the data from the disk though.

I wouldn't worry about it too much if you've got dvd ram +r/-r within a couple of years we will all be upgrading to using blue ray dvd disks instead.