Re: [ARSCLIST] CD Longevity

[Mike Richter <mrichter@xxxxxxx>]

Joe_Iraci@xxxxxxxxx wrote:
> Since the paper mentioned below was written, I did test other
> phthalocyanine dye and gold metal layered discs. Below is a post I made to
> AMIA-L in December.
>
>
> In some cases you are not sure who actually manufacturers the discs, but
> for what it is worth here is a list of gold metal-layered discs with
> phthalocyanine dye that I have come across. Not sure if all are currently
> available.
>
> Brand - Kodak; Manufactured by Kodak (discontinued)
> http://www.kodak.com/global/en/service/faqs/faq1632.shtml

I was reasonably content with this one - and with Kodak Ultima media 
which were very fine when they were in production - until that last Q&A:

Kodak claims that the data lifetime on its CD-R Ultima media is 100+ 
years. How can this be when I have I read that unwritten CD-R media has 
a shelf life of 5-10 years?
Because that's as long as unwritten CD-R media has been tested. There is 
no reason to believe that unwritten media won't last as long as written 
media. Archival lifetime testing is typically performed on written media.

The meaning of failure is fundamentally different for written and 
unwritten discs. That penulitmate sentence appears to me entirely 'off 
the wall', comparable with saying there's no reason to believe that the 
cheese won't last as long as the mayonnaise.

Mike
--
mrichter@xxxxxxx
http://www.mrichter.com/