[Lvlug] verifying copied cd's

[Joel]

I had used the following to check burnt cd's dd if=/dev/cdrom
of=/dev/null  It is direct from suse's site when I had a bitch of a time
installing it on a sparc20.  Here is the link.

http://sdb.suse.de/en/sdb/html/hmeyer_install_media.html

Is this a viable way also to check cd's?

joel



Randy Kramer wrote:
> 
> Linc Fessenden wrote:
> > The cdrom and the ISO *should* match before and after burning as long as
> > you are using a proper iso image.  At least as long as you are using a
> > proper ISO.  I don't know about those windows ISO's though.  Most times I
> > generate my cd images the easy way in unix by doing a:
> > cat /dev/cdrom > cdimage.iso
> 
> Thanks!
> 
> Interesting!  Haven't had that happen yet!  Usually my installs work
> fine.  And, I can make  copies of a copy and each has the same md5sum,
> but the copies never match the md5sum of the downloaded iso (not that
> I've downloaded that many).  The md5sums of the downloaded isos do match
> the published md5sums (or, if not, I "repair" the iso with rsync).
> 
> People on other mailing lists have hinted that my problem is a bad
> burner, but that doesn't ring true if I can successfully make a copy of
> a copy.
> 
> I guess this will remain a puzzle for a while longer. ;-)
> 
> Randy Kramer
> 
> (PS: If anybody is interested in my results, see
> http://twiki.org/cgi-bin/view/Wikilearn/CdromMd5sumsAfterBurning.)
> 
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