How to Verify Optical Media after Burning

[Dazed_75]

Thanks for testing that.  I did not think to md5sum the device itself but it
it probably not a surprise as the md5sum for that might include unused but
recorded space (zero filler and such).  I am also reminded of back in my
development days that it was nearly impossible to guarantee that two builds
from exactly the same sources would be physically identical (logically and
functionally of course, but ...).

I am going to recheck the DVD on another and better machine.  Perhaps the
old, slow, well used, and limited resources on the other one affected the
verification.

BTW, this thread would be better titled How to Verify Optical Media after
Burning.

On 9/27/06, Kenneth <madhse at yahoo.com> wrote:
>
> I always thought you could md5sum the device, but when I tried that on the
> Ubuntu CD it gave a different sum, even though their self-check was ok, so
> I'm not sure any more.
>
>
> --- Dazed_75 <lthielster at gmail.com> wrote:
>
> > I downloaded ubuntu-6.06.1-dvd-i386.iso and verified the md5sum against
> > that
> > listed at the download site.  I then burned the DVD and got no
> errors.  One
> > nice thing ubuntu has in the 6.06 release is a menu option (on booting
> the
> > CD/DVDs) to verify the CD/DVD content.  When I tried this, it shows
> errors
> > for some files.
> >
> > Surely there could be a problem with the burn, but I was wondering if
> there
> > is any way to md5sum the DVD?  The only thing I could think of is to
> make a
> > .iso from it and I do not know if that would even be expected to
> reproduce
> > the original iso and match its sum.
> >
> > I realize I probably need to burn another DVD, but the question is still
> a
> > valid one.
> > --
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-- 
Be who you are and say what you feel, because those who mind don't matter
and those who matter don't mind.  - Dr. Seuss
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