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Are DVD recordables as durable as CD-R ?
I have just bought a Sony DVD Recorder. It records both DVD-R and DVD+R, and it can record DVD+R at 8x.
I'm not sure if I should trust it for long-term (10 years, for example) data storage or not.
I know that CD-R can be trusted.
However, in the early days of CD-Rs, there were a lot of problems: some writers broke really quickly, after writing only 50-60 disks, some disks broke quickly (information unreadable after a few months), etc.
I'm thinking of switching to DVD recordable disks, but I want the data to last at least 10 years.
Are DVD +/- R disks as reliable as CD-R disks ?
Also, is a DVD recorded disk more vulerable to dust, small scratches, etc, than a CD?
Any special precautions I should take?
Michael
Sunday, March 7, 2004
I'm not at all sure that CD-R's are reliable.
I've recently been cloning a few machines from Cd images, and about one CD in fifteen is created faulty.
Stephen Jones
Sunday, March 7, 2004
They are pretty good. The only thing and this was similar when CD-R's first game out is that cheap media is just that - cheap
You may have to spend sometime trying different types of media to find what works best with your drive however once you do, it should be all smooth sailing
Dan G
Sunday, March 7, 2004
Using CDRs can be a real learning experience, I used to buy batches of 100 uncoated unbranded medias (CAD$30 per 100), only to learn they stick together and the reflective surface would just peel off. Now I buy a more coated surface (still noname though--like RiDATA--CAD$15 per 50) to prevent peeling and sticking.
Li-fan Chen
Sunday, March 7, 2004
DVDRs are made from the same machines and material as CDRs. To be perfectly blunt, when you lose a DVD, you lose 4 gigs of data, when you use a CDR, you lose 700 megs. If insurance companies insured data, that's how they would look at the risk.
Li-fan Chen
Sunday, March 7, 2004
You risk is the same if both forms of media are equally likely to fail.
It's about 6 or 7 CDs per DVD in terms of data storage, so you're much more likely to lose a CD than a DVD, even if the data loss is higher when you lose a DVD.
As far as reliability goes, even on CDs there are mixed accounts. Some people have had no problems with CDs, others report mass failures after a few years.
It seems to be a combination of burner + media + environment. The bad news for DVDs is that the media and burners are less mature, so if anything you'd expect them to be worse on average. I'd suggest spending a little more and getting name brand media (TDK or verbatim seem to be highly rated).
Sum Dum Gai
Sunday, March 7, 2004
Clearly you should stick to floppies, preferrably single-sided 720KB variants. This will ameliorate the risk accordingly.
Dennis Forbes
Sunday, March 7, 2004
Or acid-paper, they are very popular and durable, however the data you store are very much open to interpretation hundreds of years from now.
Do it with class, smoke signals last up to 5 minutes under the right conditions.
Li-fan Chen
Sunday, March 7, 2004
DVD failures
http://www.andraste.org/discfault/discfault.htm
Michael
Monday, March 8, 2004
I looked into the life expectancy of CD-Rs some time ago. Most were only expected to last for 30-50 years. I had assumed that they would last much longer. If that seems 'OK' think about the quantity of information that we have now which will be gone in 50-100 years.
The best that I could find were some Kodak gold ones which should last ~270 years.
Higher information density means a shorter life span. I don't know if the disks themselves are more stable now. Perhaps someone can offer an insight.
Ian Sanders
Monday, March 8, 2004
10 years would be enough for me.
I'm sure that in 5 years we will all be using blue ray SuperMega-DVD with 50 GB of storage capacity per disk (the blue ray DVD format is in the works right now).
Viper Rage
Monday, March 8, 2004
Michael, the site you reference about DVD failures is addressing pressed disks, not burned. The differences are probably greater than the similarities when considering how they fail.
RH
Monday, March 8, 2004
Technology (hardware and software) will probably make the disks obsolete faster than the disks will decompose.
How many people have qic-60 tape readers anymore? How many people can read Multimate files anymore?
Expect to transfer the data to some other media in the future if you actually need the data.
I suspect that the denser the storage the less reliable it is.
Yes, with a 6GB disk, you'll lose 6GM of data if the disk is lost or destroyed but it's much easier to make multiple copies of 6GB of data than it is if the data was in 700MB chunks.
njkayaker
Monday, March 8, 2004
This section of a recent PC Magazine article:
http://www.pcmag.com/article2/0,4149,1420963,00.asp
discusses the lifetime of recordable CDs.
I have had some problems in the past with no-name brand CD-Rs which became unreadable after a few years, even though they were stored reasonably carefully. I now stay with name brands such as Memorex, TDK, Fuji, etc and I have had no problems with those. I don't realistically expect any of them to still be readable after 25 or 50 years, so I re-record my archive CDs every few years. I also make 2 copies and store them in different places. I have just started with recordable DVDs, so I don't have much experience with them yet.
Philip Dickerson
Monday, March 8, 2004
I dont seem to think that dvd`s or cd`s can be trusted long term as I have been using a ricoh mp5125a drive for quite a while now (updated firmware installed) and have found that after a few weeks or months the dye on the disks started to "spludge" or "streak" (dye fault)in small patches all over the disk (they can be seen as small patches in strong light), the disks started off fine with no problems (datawrite branded but made by ricoh) and now the disks are full of errors, to put it simply, disks I burned months/weeks ago have started to die on me, but disks i made years ago on cdr are still going strong although I did have a few failures its nothing compared to dvd writing.
So far I have tried so called "grade A" disks, no names and branded types some work and a vast majority don`t, as for quality control I think its the dvd writer thats at fault as cdr`s I burnt are still ok its just the dv+r`s that seem to be rubbish .....
If this is the future F that, manufacturers should get their act together instead of thinking F the customer profits come first, as this is one customer who is really pis*ed off.
annoyed dvdwriter owner
Thursday, April 1, 2004
Typo error...it should say:-
So far I have tried so called "grade A" disks, no names and branded types some work and a vast majority don`t, as for quality control I DONT think its the dvd writer that`s at fault as cdr`s I burnt are still ok its just the dv+r disks that seem to be rubbish .....
Ps... Is anyone having the same problem with dvd- and dvd+ disks?
annoyed dvdwriter owner
Thursday, April 1, 2004
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