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SubjectRe: Some facts about drive speeds Reply to this message
Posted byhagbard
Posted on08/31/04 11:31 AM



> > Cd reading ratings are not entirely accurate. The 48 speed quoted is the
> > theoretical maximum which is on possible at the very last part of the disc
> where
> > the disc has a larger diametre and more data passed under the head in a given
> > revolution. Most drives start slower and build up as the drive head moves
> > towards the outside of the cd.
> >
> > Also some drives read cdr media or media that it has trouble reading at a
> slower
> > speed to increase accuracy.
>
> Correct!
>
> I have an Afreey 56x IDE CD-ROM that I use for a ripper, and even though it is
> one of the fastest CD readers that I've ever used or seen, it also only starts
> reading at somewhere between 20x and 24x, and only reaches maximum speed (56X)
> at the very end of the disc.
>
> So having a 48x (max) CD-ROM start reading at 20x, is perfectly normal.
>
> Download CDSpeed from http://www.cdspeed2000.com/ , and benchmark your drive.
> Best to use several CDs, some pressed, some burned, maybe a CD-RW or two, and
> see how your drive reads them, and at what speeds. Even though my drive can read
> pressed and burned CDs at 56x (max), it only reads CD-RWs at a fixed speed of
> 8x.
>

Yeah, I know it, but the problem is that every program I tested (nero drive speed, CDex, Intel Ap. Acel.) tells speed is fixed to 20X.
Also used cdspeed and sometime go 20X fixed sometimes up to 40X. However, it's only happens in tests, in the real thing runs very, very slow (20X)...
Thanks your attention

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Entire Thread
Subject  Posted byPosted On
*My DVD-ROM only reads CDs at 20x. but it's a 48x one...  hagbard08/17/04 11:24 AM
.*Re: Some facts about drive speeds  Looker08/19/04 06:29 PM
..*Re: Some facts about drive speeds  Videoman08/23/04 10:25 PM
....Re: Some facts about drive speeds  hagbard08/31/04 11:31 AM
.*Re: My DVD-ROM only reads CDs at 20x. but it's a 48x one...  Big-Pete08/17/04 06:05 PM
..*Re: My DVD-ROM only reads CDs at 20x. but it's a 48x one...  hagbard08/18/04 10:46 AM
...*Re: My DVD-ROM only reads CDs at 20x. but it's a 48x one...  Big-Pete08/18/04 11:22 AM
....*Re: My DVD-ROM only reads CDs at 20x. but it's a 48x one...  hagbard08/18/04 11:28 AM
.....*Re: My DVD-ROM only reads CDs at 20x. but it's a 48x one...  Big-Pete08/19/04 04:22 AM
......*Re: My DVD-ROM only reads CDs at 20x. but it's a 48x one...  hagbard08/19/04 11:21 AM
.......*Re: My DVD-ROM only reads CDs at 20x. but it's a 48x one...  eevert08/19/04 12:08 PM
........*Re: My DVD-ROM only reads CDs at 20x. but it's a 48x one...  hagbard08/19/04 01:11 PM
.........*Re: My DVD-ROM only reads CDs at 20x. but it's a 48x one...  Big-Pete08/20/04 07:01 AM
..........*Re: My DVD-ROM only reads CDs at 20x. but it's a 48x one...  hagbard08/23/04 12:12 PM
..........*Re: My DVD-ROM only reads CDs at 20x. but it's a 48x one...  hagbard08/20/04 12:08 PM