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09/25/2005 07:29:54 AM · #1 |
I purchased a DVD burner for backups as the sequential CD's were getting out of hand.
I have a choice of burning on Plus (+) or Minus (-) disks. I know they are competing formats. Is there and advantage of one over the other? |
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09/25/2005 07:50:15 AM · #2 |
As far as I know, for data backup, there is almost no difference.
When you are burning Video-DVD's then there's a small difference.
Most of the new players now can play both formats, but some older DVD players only can play 1 format. DVD-R was more used, but DVD+R has catched up.... |
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09/25/2005 10:42:49 AM · #3 |
| If I remember correctly (and I may not), plus is just a wee bit better for some technical reason I don't understand, but minus has been around a little longer so some older DVD players wont play plus. |
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09/25/2005 10:50:44 AM · #4 |
Plus has smaller system area so the disk finalizes faster. That means you save few seconds during recording. Be carefull, DVD were never meant for backup. They are not as reliable as CDs.
I use combination of DVDs and external hard drive.
Nick
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09/25/2005 10:52:40 AM · #5 |
they are almost identical, but for some strange reason mac uses - and PC uses +, that is older models, now most cimputers comes with +/- writers
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09/25/2005 11:11:24 AM · #6 |
Originally posted by Nikolai1024:
Plus has smaller system area so the disk finalizes faster. That means you save few seconds during recording. Be carefull, DVD were never meant for backup. They are not as reliable as CDs.
I use combination of DVDs and external hard drive.
Nick |
If the data verifies at the time of backup (an extra step I ALWAYS take when backing up) and the disk is carefully stored, what makes it less reliable? |
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09/25/2005 04:48:49 PM · #7 |
While my burner and stand alone DVD player support both formats -- I've found the +R disks can be recorded at a faster speed and with far fewer incidents of problems during verify.
Also, the book type can be changed. While this is not important for data storage, for movies it helps. After learning the expensive way that two small children means having twenty excited and often careless fingers on the DVDs they watch. I now only allow them to watch backups. While my stand alone DVD player will play any format, if I change the book type from DVD+R to DVD-ROM it recognizes the disk and navigates the menus faster.
As far as reliability for backup; as long as you use quality disks the only additional liability when using DVDs over CDs is the amount of data on each disk. If a single DVD goes bad, you lose about 7 times more data than if a single CD goes bad.
I would recomend using a PAR utility to add some insurance.
PAR project page
QuickPAR utility
David
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09/25/2005 04:51:57 PM · #8 |
We have 2 dvd players here. One cost $400 the other cost $42. If we try to watch anything on the $400 one with DVD-R's it skips and jumps so bad that it cant be watched.
The $42 one has no problems whatsoever. We tried DVD+R's in the expensive one and it worked without any issues at all.
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09/26/2005 08:26:55 PM · #9 |
Originally posted by photodude:
Originally posted by Nikolai1024:
Plus has smaller system area so the disk finalizes faster. That means you save few seconds during recording. Be carefull, DVD were never meant for backup. They are not as reliable as CDs.
I use combination of DVDs and external hard drive.
Nick |
If the data verifies at the time of backup (an extra step I ALWAYS take when backing up) and the disk is carefully stored, what makes it less reliable? |
I'm sure about this but from what I read DVD is a media where loss of small parts of data is acceptable. Meaning it was designed for movies. If you watch a move and something on the screen jumps or weird pixel appreas it is no big deal. But with data it could be losss of a file. CDs have extra recovery "sectors" and DVDs do not. Also DVDs have higher recording density making them more valnurable to scratches and dust.
There is also less information about life of a DVD. Every company does their own tests on how long disk should last. Of couse everybody tunes tests to their advantage.
Anyway, I do not have a lot of technical info on DVD so I cann't argue case againt them. DVDs are not bad you just have to be more carefull with them.
Nick
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