1 checksum keeps failing with feisty-desktop-i386 21022007

[Ari Torhamo]

On pe, 2007-02-23 at 18:33 -0500, Matthew Flaschen wrote:
> Michael R. Head wrote:
> > On Fri, 2007-02-23 at 20:18 +0200, Ari Torhamo wrote:
> >> I just downloaded and burned  feisty-desktop-i386.iso of 21.7. I keep
> >> getting one checksum fail when I check the disk no matter what I do. I
> >> have downloaded the  file three times and burned it to two different
> >> disks (from different manufacturers). Could it be that the file is
> >> corrupt? I have downloaded and burned feisty twice before this without
> >> problems. Actually, to my remembering, I have never had a checksum
> >> problem with any of my ubuntu disks before.
> >>
> >> Is anyone else having problems with this file? In the meantime I might
> >> give herd 4 a try to have something to move on with.
> > 
> > You can mount the ISO itself before burning and check the checksums.
> > 
> > $ mkdir iso
> > $ sudo mount -o loop ubuntu-6.06.1-desktop-i386.iso iso
> > $ cd iso
> > $ md5sum -c md5sum.txt
> > ...
> > lots of output
> > ...
> > 
> > If everything's OK, then the ISO is fine, and the problem may lie with
> > the burner or media.
> 
> If you want to check the iso before burning, just run md5sum on it:
> 
> md5sum ubuntu-7.04-whatever.iso
> 
> , then compare to the appropriate md5sum at
> https://help.ubuntu.com/community/UbuntuHashes .  There's no need to
> mount it.


I didn't come to my mind to check the checksums of the ISO. However, I
already downloaded Herd 4, burned and checked it without any errors (I
was installing Ubuntu for someone else and it was late, so I had to move
on). This makes me think that there indeed might be something wrong with
the original daily 21.2.2007 ISO image from cdimage.ubuntu.com.
Remember, I used:

1. Two different machines to download the ISO
2. Two different burners to burn the disk
3. Burned it onto two different disks
4. I downloaded it alltogether three times and burned five times
5. Downloading Herd 4 and burning it was immediately succesfull - no
checksum errors

I was going to download the problematic ISO once more and now test it
directly, but I just noticed that the file has already been replaced by
a newer one on the server.

Thanks for advice Michael and Matthew.

Ari Torhamo