FC3 coasters

Dave Roberts ldave at droberts.com
Wed Nov 17 15:11:40 UTC 2004


On Tue, 2004-11-16 at 08:23, Paul Howarth wrote:

> Most likely all of your CDs are fine. Try booting using "linux ide=nodma".

I had this problem too and was trying to figure out what was wrong. I
have not yet tried the linux ide=nodma solution. When should I be
entering that? When I'm first booting for the install?


> You can check that your ISO downloads are OK by comparing the md5sums with 
> those published on the download site:
> 
> md5sum -c MD5SUM

So I have done that. The sums all check. It seems I have the isos all
downloaded correctly.


> where MD5SUM is the file of that name in the iso directory that you downloaded 
> the ISO images from
> 
> You can check that your burned CDs are OK by getting the data back off the CD 
> and either comparing the file with the original ISO or checking its md5sum.
> 
> dd if=/dev/cdrom of=burned-iso-1.iso bs=16384
> cmp burned-iso-1.iso FC3-i386-disc1.iso
> md5sum burned-iso-1.iso  (then compare the result with that in the MD5SUM file)

So this does not work for me. The dd command completes with an error for
every CD I try this with. When I do the cmp command, it always tells me
that the dd-created iso is short, which it is by byte count. Everything
appears to match up to that point, but it looks like dd isn't getting
all the info.

Now, I also tried this on an older FC1 CD that I had laying around and
the same thing happens.

I'm not very familiar with dd, having always used it to simply do basic
conversions (byte-swapping, etc.). Does use of this command really
create a full iso image? Knowing what I know about it, I would think
that it would just pick up the user data in the file system and that you
would still be missing the TOC info, etc. Does that explain the file
size difference?

Confused,

-- 
Dave Roberts <ldave at droberts.com>




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