Print

Print


----- 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.
> 
> Mike
> -- 
> [log in to unmask]
> http://www.mrichter.com/
> 
> 
> -- 
> No virus found in this incoming message.
> Checked by AVG Free Edition.
> Version: 7.1.385 / Virus Database: 268.3.1/291 - Release Date: 3/24/2006
> 
>