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From: dca@edison.UUCP (David C. Albrecht)
Newsgroups: net.audio
Subject: Re: Re: CD cleaner and laser MTBF.
Message-ID: <549@edison.UUCP>
Date: Mon, 16-Sep-85 10:25:31 EDT
Article-I.D.: edison.549
Posted: Mon Sep 16 10:25:31 1985
Date-Received: Wed, 18-Sep-85 05:43:16 EDT
References: <236@cmu-ri-rover.ARPA> <523@oakhill.UUCP>
Organization: General Electric Company, Charlottesville, VA
Lines: 15

> A tangential
> or circular scratch would destroy a lot of data and, more importantly,
> have a better chance to destroy the redundant info, as well.
> 
> 	Since *all* of the CD cleaners that I have seen involve wiping
> the disc while spinning it, doesn't it seem reasonable to assume that
> these devices are not only unnecessary but also undesirable?
> 

Virtually all the spinning cleaners I have seen do not spin the wiping
surface concentric to the disk but rather offset it so that the edge of
the wiping surface intersects the disk at the center point and thus is
perpendicular at the edges of the wiping surface to the disk tracks.

David Albrecht


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