Re: IDE CDROM and dd...

[Jim Nance]

On Wed, Jun 07, 2000 at 12:46:09AM -0400, Jeff Garzik wrote:
> Jens and lkml,
> 
> I have consistently had a problem with kernels >= 2.2.x where dd'ing
> from /dev/cdrom to a file fails.  In fact this operation has never
> worked for me on a CDROM drive faster than 4X, and this behavior is
> noted across multiple CDROM drivers and multiple IDE controllers. 
> Mounting the CDROM (as opposed to 'dd') works just fine, even under
> stress.

I am having similar problems trying to dd a music CD.  Is this supposed to
work, or does the driver "know" something about what the data on the CD is
supposed to look like?  I see from your other posts that you did manage to
get some data off the disc.  It fails for me at the beginning and I do not
get anything.

Thanks,

Jim