> Richard Anderson wrote:
>
... I found quite a few that wouldn't spin up in my R55, giving disc
> errors. Opening the shutters of these discs I saw pin-prick holes in the
> disc surface that light was able to shine through.
>
I find this quite alarming. As I understand it, a CD should be able to
tolerate a 3mm break in a track without any problems, using
error-correction. I had assumed the same applied to minidiscs, since the
quoted capacity gives more or less the same bit density. If a pinhole can
cause an MD to be rejected, does this imply the error-correction on MDs is
less effective ? Also, where are these pinholes coming from ? If they were
there at manufacture, they should either have been rejected, or have had no
effect (it's possible the pinholes are a red herring). If they developed
later, what is the mechanism, and can we expect all our old MDs to go the
same way ?
simon
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