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Life expectancy of DVD+R DL's
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-Marlin-
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1. October 2005 @ 10:15 |
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Are there any estimtaes or expected archival life for DL media?
As on some Maxell media I see a guaranteed 100 year archival life, but some on here say maybe 5 years.
Thanks
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Senior Member
3 product reviews
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1. October 2005 @ 11:00 |
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Archival life depends on the Meida Quality, Storage conditions, etc. Media Quality is Primary, Storage conitions after that. Quality Media stored properly in a dark place, not too hot or humid, should last longer than any Human will live.
Use The Best Media for The Best Burns! TYs, Verbs,(Made in Taiwan) Sony MIJs (YUDEN000 T02), Sony Made in Taiwan DVD+R 16x, Maxell MIJ, RITEK G05.
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Moderator
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1. October 2005 @ 12:17 |
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...trouble is they're new so who really knows!, even CD's haven't been around too long
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whatup18
Suspended permanently
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1. October 2005 @ 13:17 |
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[Advert removed, idiot banned]
This message has been edited since posting. Last time this message was edited on 2. October 2005 @ 05:59
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AfterDawn Addict
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1. October 2005 @ 13:18 |
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... and you base this 5-10 year estimate on what information?
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AfterDawn Addict
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1. October 2005 @ 13:57 |
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4. How Long Can You Store CDs and DVDs and Use Them Again?
rule
The life expectancy (LE) of optical discs depends on many factors, some controllable by the user, others not.
Factors that affect disc life expectancy include the following:
* type
* manufacturing quality
* condition of the disc before recording
* quality of the disc recording
* handling and maintenance
* environmental conditions
As noted previously, the three basic types of CD and DVD discs?ROM, R, and RW and RAM?each use a different data layer material (molded aluminum, organic dye, or phase-changing film, respectively). Deterioration of this material is the primary cause for disc degradation and, ultimately, "end of life" for the disc, assuming proper physical handling.
Environmental factors can affect the rate of disc degradation. In each of the three basic disc types, environmental forces will degrade the data layer much faster than the polycarbonate substrate layer (the clear plastic that makes up most of the disc). Because degradation of the data layer will render the disc useless well before the polycarbonate begins to deteriorate, the relative degradation rate for the polycarbonate layer is not used for life expectancy considerations. Physical mishandling of the disc is usually the cause of polycarbonate layer damage. The polycarbonate may also flex or bend if stored for a long period of time in a nonvertical position.
So what is the life expectancy of a disc? First, we must define life expectancy. For most users, it means the length of time for which the disc remains usable. But that implies some acceptable amount of degradation. How much and what type of degradation is acceptable?
With CDs and DVDs, the user does not notice early degradation because the error detection and correction capability built into the system corrects a certain number of errors. The user notices a problem only when the error correction coding is unable to fully correct the errors.
One method for determining end of life for a disc is based on the number of errors on a disc before the error correction occurs. The chance of disc failure increases with the number of errors, but it is impossible to define the number of errors in a disc that will absolutely cause a performance problem (minor or catastrophic) because it depends on the number of errors left, after error correction, and their distribution within the data. When the number of errors (before error correction) on a disc increases to a certain level, the chance of disc failure, even if small, can be deemed unacceptable and thus signal the disc's end of life.
Manufacturers tend to use this premise to estimate media longevity. They test discs by using accelerated aging methodologies with controlled extreme temperature and humidity influences over a relatively short period of time. However, it is not always clear how a manufacturer interprets its measurements for determining a disc's end of life. Among the manufacturers that have done testing, there is consensus that, under recommended storage conditions, CD-R, DVD-R, and DVD+R discs should have a life expectancy of 100 to 200 years or more; CD-RW, DVD-RW, DVD+RW, and DVD-RAM discs should have a life expectancy of 25 years or more. Little information is available for CD-ROM and DVD-ROM discs (including audio and video), resulting in an increased level of uncertainty for their life expectancy. Expectations vary from 20 to 100 years for these discs.
Few, if any, life expectancy reports for these discs have been published by independent laboratories. An accelerated aging study at NIST estimated the life expectancy of one type of DVD-R for authoring disc to be 30 years if stored at 25°C (77°F) and 50% relative humidity. This testing for R discs is in the preliminary stages, and much more needs to be done.
GO HERE TO READ THE REST
http://www.clir.org/pubs/reports/pub121/sec4.html
Care and Handling of CDs and DVDs: A Guide for Librarians and Archivists
http://www.clir.org/pubs/reports/pub121/contents.html
This message has been edited since posting. Last time this message was edited on 1. October 2005 @ 14:12
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OzMick
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1. October 2005 @ 14:15 |
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These guys have all talked about the theoretical side of things that can be measured in a roundabout way in the laboratory. What these measurements do not really take into account is the general abuse that your disc takes in using it. If you plan to make a copy of your original and then archive the original stamped disc, you can probably just use the numbers they give above and just make another copy off the original whenever needed (if ever). The real thing you probably need to measure media life against is how long DVD technology is going to be around... It is getting increasingly difficult to find VHS tapes to rent these days, think of what is going to happen 5, 10 or 15 years with the next generation of media format? Just a few other things to think about, it's all good and well to say something will last 200 years, when it might be hard to even find a player in 20 years...
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-Marlin-
Member
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1. October 2005 @ 14:47 |
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Wow... that was one in depth response...that was wicked...lol
Yeah I just didn't want to go spending $7 ea on verb DL's and have them go to crap in 3 years or so...
100-200 years should do me just fine I would think, considering I was only looking for 10-15 years incase, as it was mentioned DVDs are around that long....lol
I think blue ray players will play normal dvds though, so we shold be good for a while... no?
Thanks guys!!!! this thread gave me the peace of mind i was looking for!!! lol
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AfterDawn Addict
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1. October 2005 @ 19:47 |
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@catfreak
perhaps he bases his estimation on the fact that we got ourselves another "affiliate" guy again~ :) what's up with all these "affiliate" dudes lately? first it was david20, then mummy20, now we got whatup18? what's next? "imnext16?" LOL
@ireland
very interesting information, seems pretty accurate to me~ :)
Recommended Media:
Taiyo Yuden 4x dvd-r TYGO1/ 8x dvd-r TYGO2/ 8x dvd+r YUDEN000T02/ 16x dvd+r YUDEN000T03
Verbatim 8x dvd+r MCC003
Verbatim dvd+r DL (MKM001)= flawless no compression backups
"Do Yourself A Favor, Use The Good Stuff
TY & Verbs 4 Life~ :)" ~docTY~
"Its better to be quiet and appear stupid, then to open your mouth and remove all doubt."
I am always prepared to recognize that there can be two points of view - mine and one that is probably wrong - John Gorton
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Moderator
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2. October 2005 @ 03:55 |
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affiliate reported in a.n.other thread
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Senior Member
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2. October 2005 @ 12:52 |
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I have seen this 100 year estimate thing quoted many times, and it always brings up to me the question of what are we really trying to do with these movies/data? Backup of an original? and i get to thinking just like OzMick said about technology advances. Yes many times things are backwards compatible for a while but the new technology usually replaces the old with something better/faster/cheaper. With current technology we can have near perfect backup of movies with DVD9-DVD5 programs, or perfect backup of DVD9 by using DL discs. By storing to your HD or keeping a master copy disc that never gets general use, the movie/data should last longer than we do. After i am dead, i don't think i will need my DVD collection anymore.. :)
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