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[OM] Re: CDs, was Question on DVDs

Subject: [OM] Re: CDs, was Question on DVDs
From: Jonas Otter <jonas@xxxxxxxx>
Date: Fri, 15 Apr 2005 09:57:51 +0200
David Reed wrote: 

> At the following link you will find a tool that tells you the media ID 
> of a disc.
> http://www.dvd-recordable.org/modules.php?op=modload&name=Reviews&file=index&req=showcontent&id=106
> ...

Note that the media ID of a disc is physically encoded into the side-to-side 
meander of the track on the disc, therefore it comes from the glass master used 
to press the plastic blank used to make the disc, so it will really only show 
you who made the master or the machine that made the master, not who pressed 
and/or coated the actual disc. They are often not the same company, and what 
really counts is not who made the master, but the quality of the various 
coatings. Many discs are made in China by companies that have bought masters or 
mastering equipment from somebody else. Thus you need to take any information 
the media ID may give you with many large fistfuls of salt. 


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