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'[EE]: Re: [AR] The aRocket Library...'
2001\03\15@090656 by Russell McMahon

picon face
> > It would be more economical, but then the end-user has to unzip some
really
> > large files (50MB). And, if you want to avoid having to do it over and
over
> > again, you would have to save the files to your hard drive. I'd rather
eat
> > the cost of having 2 CD's instead of 1. My  cost for blank CD's is
95-cents
> > approx. and that's only because I buy them 100 at a time and not 1000 or
> > more.


At the risk of starting a debate -

Consider what brand of CDR's you use and their probable lifetime.
The early Cyanine CD's had suggested lifetimes of 5 to 10 years and failed
even that miserably under practical conditions.
The 2nd generation Phthallo Cyanines (gold surface) had claimed lifetime
approaching 100 years but didn't all do much better than the Cyanines.

There has been a lot of work done (presumably) on this problem and eg Kodak
claim a 20 year written and 25 year unwritten life for some of the CDRs.
I'll bet that not every brand will last as long. Storage conditions matter.
I don't know how good Kodak's product really is but the local (NZ) Salvation
Army IT department has standardised on them after researching the issue.
Others may know what other larger organisations are doing.

I have seen older Cyanine Cds that are unusable about 2 years after having
been written.
Do you know where YOUR archives are ? :-)
(Paper may yellow and crumble but it's generally fairly easy to see that it
is doing so).



regards,


                   Russell McMahon

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2001\03\15@121251 by David VanHorn

flavicon
face
>
>I have seen older Cyanine Cds that are unusable about 2 years after having
>been written.
>Do you know where YOUR archives are ? :-)
>(Paper may yellow and crumble but it's generally fairly easy to see that it
>is doing so).

In the book "Deep time" they discuss plans to mark a nuclear waste
facility, where some government committee suggested that they put the info
on CDROMs and bury them around the site.  Whatever they use, it has to be
workable 10,000 years from now..

They also had a lot of good WORKABLE concepts, from the Sci-Fi community. :)


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