On 7/19/07, Lan Barnes <[EMAIL PROTECTED]> wrote:

Since TV is only TV, the only data of any real (irreplacable) value on
these drives are family photos. These will be burned to DVD this weekend.
3 - 5 years is a hell of a lot better than "oh shit!"

Here is some partially relevant information from National Institute of
Standards and Technology:

Whole article is at <
http://www.itl.nist.gov/iad/894.05/docs/StabilityStudy.pdf >

Excerpt below:
- - - - - -
While there are a number of factors that may contribute to the stability
of the CD-R and DVD-R media, dye type is generally considered one of
the more important ones.  Based on the test results for CD-R media, this
expectation appears to hold true, even with mixed results for the dye
types.  Samples containing phthalocyanine performed better than other dye
types.  In particular, phthalocyanine combined with a gold-silver alloy
as a reflective layer was consistently more stable than all other types
of CD-R media.  Discs using azo dye as the data layer had less stability
in light exposure and temperature/humidity stress testing.  Media using
cyanine dye performed well when exposed to light but had problems when
under temperature/humidity stress conditions.
- - - - - -

They also say that it's not easy to determine dye type from the outside package.

I saw some "long-life" gold CD-R media at Fry's a few days ago.  I
wasn't looking for recordable  DVDs so I didn't see any.

   carl
--
   carl lowenstein         marine physical lab     u.c. san diego
                                                [EMAIL PROTECTED]


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