[rollei_list] Re: Large Format film availability
- From: "Eric Goldstein" <egoldste@xxxxxxxxx>
- To: rollei_list@xxxxxxxxxxxxx
- Date: Sun, 4 May 2008 09:25:10 -0400
Michael Eric:
Mark wrote that gold DVDs are supposed to be ok. They are not ok in
any archival sense (and no, archival does not mean papyrus). Most
independent testers I have researched specify burned CDs/DVDs at a
roughly 3 year life. In practice, I know that some can and do fail
much more quickly. Others have posted the same experience,
specifically with CDs using gold as a reflective layer. This is
documented on the net as well.
The point is that burned media, no matter what they are made from, are
unreliable. Taiyo Yuden media are regarded by many as the highest
quality, and these are not fabricated from gold. Tape backup has
fallen out of favor because the tapes can only stand up to a specified
number of passes, and specialists in this arena recommend taking them
out of service after about 100-150 back ups, which again is very short
lived and requires a lot of active QC/oversight. Most major
corporations rely on multiple HD arrays, and while there is no
consensus on life expectancy, major corporations such as Google have
done independent studies which are available on the net for your
consideration.
Again, we are very OT here and my goal is not to persuade anyone of
anything... I just don't want an unsuspecting or casual reader of this
list to take some bad advise and loose irreplaceable data.
Most of my information comes from personal interviews with the
archivists at the Library of Congress, who recently completed a $40
million study on how to take their treasures digital to make them
available and not loose them.
Eric Goldstein
On 5/4/08, Michael Eric Berube <pj@xxxxxxxxxxxxxx> wrote:
> Eric Goldstein wrote:
>
> > This is inaccurate information. Those claims arr marketing hype.
> >
> > On 5/1/08, Mark Rabiner wrote:
> >
> >
> > > Those more expensive gold DVD's are supposed to be ok though.
> > >
> > >
> >
>
> I've look all over on the 'net and can't find any proof of your statement
> above Eric. In the interests of providing only accurate information on this
> list, do you have a source for the claim that Gold as a reflective layer and
> Phthalocyanine as a dye is NOT better than the cheaper materials?
>
> Every penny counts to the bottom line. I'd seriously love to be able to use
> cheap discs from Staples for more than temporary backup storage.
>
> The only thing that I can find about Gold& Phthalocyanine discs on Wilhelm
> Research's pages is what appears to be a press release claiming better
> longevity of the Gold discs put out by one of the sellers of those discs.
> While it is possible, absence of easily accessible data either way, doesn't
> automatically mean that Mitsui and Delkin's marketing claims are hype any
> more than it means that they are proven.
>
> Respectfully,
> Michael Eric Berube
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