archival cd-r - really true?

Jim Leonard trixter at
Wed Mar 15 12:29:47 CST 2006

Chuck Guzis wrote:
> How about this as an arbitrary test of the recoverabiliy of a medium?  What
> I call the "pinking shears" test.  Maybe some remember it from an episode
> from "The New Detectives" TV series.
> Take the medium and cut it into randomly sized peices, with the mean being
> about the size of a postage stamp, using pinking shears.  Pick up most, but
> not all, of the peices, throw them into an envelope and ship them across
> the country.  How much data can you reconstruct from the fragments?
> You know, floppies aren't all that bad for storing data...

Not sure I understand your point, because floppies wouldn't pass the 
pinking shears test either.  Come to think of it, I can't think of *any* 
media that would survive that test except for maybe paper.

The reason your 8" disks are still good after 20 years is simply the 
surface density ratio (meaning, less data was stored on a larger surface 
area).  The only kind of "fading" failures I've hever had were on 
high-density 3.5" media, where much more data is packed more closely 
together.  Just my experience, I could be wrong...
Jim Leonard (trixter at  
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