Re: [AV Media Matters] High Speed CD-R

[jhartke@mscience.com]

You ask many questions, all relevant but impossible to answer in a
concise, simple way.

In general, high speed drives present greater risks than lower speed
drives. In general, high speed discs present greater risks than lower
speed discs.

Mr. W. Williams recently posted information here stating that Mitsui was
offering a ProStudio family optimized for lower speed burning. Perhaps
this will help.

There is no magic answer. Only testing of specific discs and drives can
answer your concerns. If archival quality is important, then your budget
should include funds for such testing.

Jerry
Media Sciences

Charles Repka wrote:
> 
> 
> >
> > I can only guess at the meaning of "consistent degradation." Bad
media
> > is bad at all speeds, while good media is good up to its rated
speed.
> > Bad results at high speed are usually traceable to the writer. Use
of
> > media at higher than its rated speeds can cause severe problems.
> > However, this should be prevented by encoding maximum speed
> > in the disc
> > and reading of this information by the writer. All media and drive
> > manufacturers do not do this, unfortunately.
> 
> I will try to clarify my question.  What I am asking is, when  using
good media ( i.e. from a reputable manufacturer of high quality blank
media) on a good writer, ( again, from a reputable manufacturer,
Plextor, for example) is there a greater chance for higher error rates
at low writing speeds as compared to higher writing speeds.  I am not
interested in the absolute extremes, i.e. 1X vs. 48X but rather 2X or 4X
> vs. 16X or 24 X.  I ask this question because my supplier of blank
media
> has suggested that the newer dye formulations have been tweaked so
much
> for high speed performance that performance at lower writing speeds
will
> suffer.  He also suggests that older burners made not be able to cope
with the newer high speed discs.  I have a number of older drives that
are still working fine as far as I can tell.  My oldest have a maximum
writing speed of 4X.  My newest drives have a maximum writing speed of
8X.  What I am trying to determine is if I need to upgrade all my
drives to higher writing speeds because the older ones will no longer be
> compatible with the new high speed media.  What I am asking is
somewhat
> different from your more global approach where you consider all
burners
> ( good and bad) and the full range of disc made by all manufacturers (
good and bad).
> >
> > If you are recording at
> > 16X or below,
> > you may wish to use 74 minute media rated for lower speeds, possibly
> > with normal thickness dye layers. I have been informed that Mitsui
is
> > offering such media, and has guaranteed long-term availability.
Other
> > suppliers may do this as well, but who wants 74 min. today now that
we
> > have 99 minute discs <snicker>.
> 
> Easier said than done.  It is very hard to find decent 74 minute
media.
> these days. I buy most of my discs in bulk and use Taiyo Yuden
exclusively.  Taiyo Yuden is no longer making 74 minute media.   I
occasionally see name brand 74 minute media for sale but usually they
are made by an OEM manufacture in Korea or Taiwan and I suspect their
quality.  And how could I ever determine the thickness of the dye
layer.?  And who is to say these discs use any different dye formulation
> at all?
> 
> Charles Repka

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