K3b .iso images problem

[Xaleandr]

Hello,

I encountered some weird problem which I cannot understand. I downloaded iso-image of 64-bit SuSE 10.2 DVD from the site of Novell, the md5sum is correct (dfded111c6a79d3efcf04b9c390f59f9)

Next, I start burning it with K3b, after 30 min the disk is ready, but after checking md5sum get the wrong value

Now switch to root and start the process -again get the wrong value for md5sum.
Next, repeat burning at the lowest possible speed (2.1 Mb/s)--again get the wrong value.

But the most interesting is that in all three cases I get the same wrong value (b3d4cfea8555fff97a335ee6b7801736)
I am using SUSE 10.2 32bit version on IBM Thinkpad laptop,
TSSTcorp CD/DVDRW TS-L532A
[I wanted 64-bit version for the recently bought Desktop].

If in all three cases I got different md5sums, I would say that this is a problem of DVD writer. But each time I got the same wrong values, which is totally confusing for me.

Could anybody please explain me what is wrong ???

[MikeTbob]

Are you absolutely positive you are reading the correct md5sums? Did you get the md5sums from the same directory as the image you downloaded?
Are you using the k3b checker? I can't remember right off hand, but I seem to recall k3b doesn't use md5sums, I think it uses sha1sums.

[Xaleandr]

Hello, MikeTbob,

Yes I am sure. The problem is NOT with downloading--downloaded image has correct md5sum.
The problem is that when I burn image, every time I get the same wrong value for the md5sum of the disk. I run md5sum directly from the command line, "md5sum /dev/hdc" or "md5sum -b /dev/hdc".
As for K3b: yes indeed it uses Md5sum .I have K3b version 0.12.17: cdrecord:: v.2.1.1a03, md5sum version 6.4.

Since the last post I tried to copy the old data CD--to check the DVD writer--and I get correct value for md5sums. The problem is with one particular disk.

Xaleandr

[Xaleandr]

Don't know what was the source of the problem-all the log files are clean, no errors/warnings.
Found that
(1) Under SUSE there is no cdrecord, there is a symbolic link to another program called "wodim"
(2) It was possible to burn the DVDs from command line with

cdrecord dev=/dev/hdc speed=44 driveropts=burnproof -eject -v OpenSUSE10.2-64bit.iso

Made 2 copies without any problem with md5sum.
Suspect this might be a problem of K3b.

[MikeTbob]

Don't know what was the source of the problem-all the log files are clean, no errors/warnings.
Found that
(1) Under SUSE there is no cdrecord, there is a symbolic link to another program called "wodim"
(2) It was possible to burn the DVDs from command line with

cdrecord dev=/dev/hdc speed=44 driveropts=burnproof -eject -v OpenSUSE10.2-64bit.iso

Made 2 copies without any problem with md5sum.
Suspect this might be a problem of K3b.

Glad you solved it!! WOOT!
On my machine, (Gentoo), K3b uses cdrecord, I had never heard of wodim, but it is installed too. You can change the k3b settings to use cdrecord, under external settings.