OT: need script md5sum help

Hi All,

    Please forgive this somewhat off topic post.  I know
that the intellectual knowledge exist here and I have
had no luck elsewhere.

    I have a script that creates an ISO and then burns
the iso to disk with cdrecord.  When I am finished, I
take an MD5SUM of the original ISO and the raw cd in
the drive.  They never match (I know the disk cut
correctly too).

   Now, I know K3B does the same thing when cutting an ISO
to disk.  What am I doing wrong?

Sum1=`md5sum MyNew.iso | awk '{print $1}'`
Sum2=`md5sum /dev/scd0 | awk '{print $1}'`
if [ "$Sum1" != "$Sum2" ]; then
    echo "CRITICAL ERROR: Check sums do not match.  Bummer..."
else
    echo 'SUCCESS!'
fi


Many thanks,
-T

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