[NTLUG:Discuss] CDROM images

[Chris Cox]

Bug Hunter wrote:
>   MY OPINION, best thing to do is the following.  I know it works :)
> 
> 
>   unmount cdrom
> 
>   dd if=/dev/hdc  of=/cdimage.iso
> 
>   (assuming cdrom is drive hdc)
> 
>   This copies everything verbatim, including errors, so start with a good 
> cdrom!  the resultant ISO file is burnable with windows and linux cd 
> burning programs.

This will not work in all cases.  Mr. Schilling has added
readcd for this purpose to the newer versions of cdrecord.
You can read his source/documentation if you want to
know why the above doesn't work in all cases.
... but it does work in most cases, might get some
read errors toward the end on some cd's depending upon
how they were created (esp. true with regards to many
commerical cds... not that anyone copies those).


> 
> bug
> 
> On Mon, 4 Nov 2002, Val W. Harris wrote:
> 
> 
>>Does anyone know what options to use for mkisofs to create an iso file
>>image of a bootable CD?
>>
>>I have the CD mounted at /mnt/cdrom1.
>>I've tried both:
>>      mkisofs -o vwh.iso /mnt/cdrom1, and
>>      mkisofs -o vwh.iso -R /mnt/cdrom1
>>In each case my file (vwh.iso) was larger than the original iso image
>>that I burned the CD from.  (And I suspect that my file won't create a
>>bootable CD, but I didn't burn it to test that suspicion.)
>>
>>This is mainly curiosity, (job hunting hasn't been entertaining enough
>>lately,) but any help would be appreciated.
>>
>>Thanks,
>>
>>Val
>>
> 
>