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Difference Dvd-R and DVD+R

I would like to know what the difference between a dvd - r and a dvd + r.  What does the + and - signify? I think there are a lot of users that would like to know the difference between these types of dvd's.
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hej613
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hej613
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1 Solution
 
CallandorCommented:
They are competing formats backed by different alliances: DVDForum vs DVD+RW Alliance http://www.anandtech.com/guides/viewfaq.html?i=118
Functionally, they are similar, though DVD-R is the most compatible by a small amount.
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1_UPCommented:
Hey buddy very good question...and here is the answer:
DVD-R is a single sided DVD that can be recorded on...
DVD+R is a double layered DVD that can be recorded on...
There are some subtle differences in the compatibility, recordability, etc. between various DVD units.
For an in-depth look at the different types of DVD recordable technologies check out this popular link:
http://www.videohelp.com/dvd
Hope this helps!!!
1_UP
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arthurjbCommented:

The main functional difference is that if you are going to make video dvd's on your computer, you should use dvd-r since it is more likely to work with a regular dvd player.
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1_UPCommented:
I mispoke:

DVD-R and DVD+R are unique formats, while DVD-R DL is a dual layered format...I type too quickly sometimes!!!
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zephyr_hex (Megan)DeveloperCommented:
dvd-r for movies or data ... it offers the widest compatibility with dvd players
dvd+r for data ... it's a little faster when burning

there are also dual layer dvd's.  you can fit twice the amount on them, but they are also more expensive (and your burner has to burn dual layer).  in many cases, it is cheaper to get dvd-r or dvd+r instead.
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garycaseCommented:
Well, a few errors here, so I'll try and correct them:

As Callandor noted, the +R and -R media are simply competing formats.

1-UP's first post was clearly erroneous, but he did mostly correct it with his second post.

It is NOT, however, clear that you should use -R for making video-DVDs.   In fact, from a technical perspective, +R media has many advantages:  +R has better defect management; has a higher basic writing speed; supports both CAV and CLV writing; and a few other less significant advantages.

-R does have one slight advantage -- and this is the only reason I keep a small stock of -R blanks:  it has a higher capacity (!!)  Not by much (4489MG for -R, 4483MB for +R).   This rarely makes a difference -- but it DOES.   I've encountered a couple of DVD ISO's I could not burn to a +R, but could to a -R.

zephyr_hex's comment that you can "... fit twice the amount on them" for dual layer DVDs is NOT correct ==> a dual layer DVD is technically a DVD-9, as opposed to a DVD-5 single layer.  The dual layer discs do NOT hold twice what a single layer disc does.  Speaking in "hard disk - ese" (i.e. 1GB is 1,000,000,000 bytes), a DVD-9 holds 8.5GB vs a DVD-5's 4.7GB.   A double-SIDED (not dual-layer) disk does hold twice as much => these are referred to as DVD-10's (and hold 9.4GB).

There are 5 fundamental capacity sizes for DVDs:  DVD-5, DVD-9, DVD-10, DVD-14, and DVD-18.   In every case, the -R's will have very slightly more capacity than the +R's;  but the +R's are technically the superior format.   No telling who -- if anyone -- will "win" the format war.   I suspect they will both flourish just fine until they are overtaken by Blu-Ray and other higher density formats.   Personally, I only use the best quality (Taiyo-Yuden) +R blanks, except for those rare occasions when the capacity issue is a problem; and then I use -R's.

Bottom Line to your question:   +R and -R are simply competing technologies; and neither has "won" the format race -- and since most drives these days will accept either, it's unlikely either will.
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garycaseCommented:
... studies to date have also shown that +R has a potentially longer archival lifespan ==> but these differences don't occur for at least 75 years, so for most purposes this is not a significant difference :-)
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Wooky JackCommented:
I used dvd-r for movies...CRAP, don't last long or aren't compatible with even 50% of dvd players

DVD+R are the way to go for dvd movies.  But if you're just backing up files either will do fine.
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arthurjbCommented:
I stand by my statement that dvd-r is more compatable with a large range of video dvd players.

dvd+r will work with most, but some of the older players will not read them properly.

Using high quality media is always a good practice.
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garycaseCommented:
You are correct that there are more players that will play -R media than will play +R media ==> but there are FAR more DVD players that won't play either (e.g. they will only play commercial DVDs).

Of the 6763 DVD players which have been been reported on at this site (http://www.videohelp.com/dvdplayers.php?DVDname=&Search=Search&dvdportable=&dvdchanger=&dvdtv=&chipset=&orderby=Date&hits=200&Submit2=Search#next),   3901 will play DVD-R, and 3412 will play DVD+R.

It's fairly safe to say that ANY new player will play both formats :-)
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1_UPCommented:
Wow, guys!!! Good answers!!! I think garycase and arthurjb have educated me!!! Well done, boys...
1_UP
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simpswrCommented:
Like they say on TV . . these guys are good!
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Wooky JackCommented:
regaring my statement:

if the dvds are for your own use only and you don't plan on upgrading a dvd player then dvd-r are great

if you are sharing them with family/friends who most likely don't have the same dvd player as you, you might want to burn them with DVD+R as more dvd players that are coming out support +R moreover.
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