Re: CD/DVD handling
- From: "Wayne C. Morris" <wayne.morris@xxxxxxxxxxxxxxx>
- Date: Mon, 29 May 2006 03:37:10 GMT
In article <447a40ab$1_1@xxxxxxxxxxxxxxxxxx>,
"Richard Tomkins" <tomkinsr@xxxxxxxxx> wrote:
Ok, this is slightly off topic but, it bears telling to a broad audience.....
4. They all placed the media down onto surfaces such as other CD's or DVD's
with the label side down. This is really bad. This will scratch the media
layer and lead to problems reading. If you are going to lay a CD or DVD on a
surface, place it so that the clear (non-label) side is down. Small
scratches on this surface are outside the reading Laser's focal range and
generally should not interfere with data reading. If you scratch the label,
you will generally scratch the aluminium layer and that means data loss.
That's only true for CDs. The DVD spec places the metallic layer closer to
the surface of the disc. This makes it easier for the laser to focus on
the smaller pits, and easier to make 2-sided discs. So for single-sided
DVDs, scratches on the label side will be less harmful than scratches to
the non-label side.
These sites have good information about the DVD spec:
<http://www.pctechguide.com/34DVD.htm>
(may appear blank, scroll to the bottom for the article text)
<http://www.dvddemystified.com/dvdfaq.html>
.
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- From: Richard Tomkins
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