I first did not know where to post this but after thinking about it I suppose that here is one of the best places to get the most interesting comments from experts …
According to this recent news here :http://www.cdrinfo.com/Sections/News/De ... wsId=24974
an association called CDs21 solutions
announced plans to contribute in the development of a longevity certification program of DVD +R and DVD-R media.
« They proposed a certification for all those media that will prove to be reliable at least for 30 years.
Today, the majority of DVD disc makers claim that their discs are reliable for more than 50 years »
So I like you to comment about this study: do we really need now a study like that ?
Why choosing a duration of 30 years ?
My first thinking is:
1°) The study to be made in Japan has not started yet and by the time their certification logo will eventually be on a package in Europe or US, do you think that the media we will get is going in some way to have similar quality to the samples to be tested in Japan ?
You ca have a look about how they identify media on their web site here:http://www.cds21solutions.org/en/techinfo/index.html
2°) If a DVD burn has let say PIE max =20 it will probably last 30 years on a well manufactured media (good dye, good bounding, . . . )
But if the initial burn has PIE max in the range of 200 or more, how long will it remain readable ?
So when it is said:
« The certification can be printed on the package of the DVD recordable discs. As a result, end-users will be able to select the media life expectancy best suited to their application requirements »
it will be more or less an illusion for the buyer to trust only
the certification logo.
3°) May be you could also add comments on the the specific methodology that is going to be used for the test and what it means in real life of end-users
Thanks a lot in advance