On Tue, Nov 28, 2006 at 10:35:43PM +0000, Paul Smith wrote:
> On 11/28/06, John Aldrich <john@xxxxxxxxxxxxxxx> wrote:
> >> > > Is there some way to verify whether a CD/DVD was correctly burned?
> >> >
> >> > In K3b you have the option to verify written data. See
> >> > Project:Burn:Writing:Options:Verify written data.
> >>
> >> Thanks, Zoltan, but I was looking for a command line solution.
> >>
> >Use the MD5sum or SHA1 sum and check it against the CD/DVD.
>
> Could you please give some more details?
There are two things you can do:
1. Compare images.
* Get a file with the md5sum of the image. Verify it against the
image when you download it:
md5sum -c md5sums
* Burn the image. Then compare the image against the burned medium:
diff /dev/hdd image.iso
2. Compare file by file.
* Check the md5sum of the image as above.
* Burn it.
* Mount both, and compare them.
mkdir foo
mount -o loop image.iso foo
mount /dev/hdd /media/cdrecorder
diff -r --brief foo /media/cdrecorder
And umount/eject as appropriate when you are done.
I prefer the file by file comparison because I'm interested in the
files rather than any padding ot other miscellaneous data the burn
software may have sent to the burner.
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