----- Original Message -----
From: "Mike Richter" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Saturday, March 25, 2006 9:38 PM
Subject: Re: [ARSCLIST] Further thoughts on the new CLIR report. DVDs
> steven c wrote:
>> Question for the technically knowledgeable...
>> Since CD's and DVD's are (AFAIK) more or less the "same animal" and
>> operate by pressing (or "burning") pits into the surface of a plastic
>> disc, why should there be any difference in the lifespan of the two?
>> Do the littler "holes" fill themselves up more rapidly?
> The materials are different, though similar. In particular, the dyes
> proved for recordable CDs are not usable for DVD.
> The data density is higher on DVD than on CD. As a result, apart from
> ECC it takes less damage to lose information from a DVD than from a CD.
> I believer there are also additional failure modes for DVD, notably
> those associated with dual layers.
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