[Lvlug] verifying copied cd's

[Randy Kramer]

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.)