[NTLUG:Discuss] K3b question

[Fred James]

erich wrote:
> Are you sure,
>           This is a k3b problem? Maybe you mean *,iso.md5sum. When you 
> get
> an *.iso file from online. You also get an *.iso.md5sum. K3b Takes 
> these two
> files and flies with them.
>
>                                                                        
>                                     Erich
>
> Fred James wrote:
>> I have never seen this one before and I would appreciate any clues ...
>> Downloaded some iso files (some CD and some DVD) ... all of them 
>> check out OK for sums (both md5 and sha1)
>> But one file (619.0 MB) always fails the write verification ... the 
>> others pass.
>> I even downloaded the suspect file a second time ... it too passed 
>> the sums, but failed the write verification
>>
>> One of the files that passes verification is 692.0 MB, so it can't be 
>> size ... anyway it is a 700 MB CD-R disk
>> Thank you
>> Regards
>> Fred James
>>
>> Mandriva 2008.0
>> K3b 1.0.3 (Using KDE 3.5.7)
Erich
1st ... I am not sure of anything
2nd ... the process, step by step ...
(a) download *.iso
(b) download *.iso.md5
(c) download *.iso.sha1
(d) cat *.iso.md5 > file1
(e) cat *.iso.sha1 >> file1
(f) md5sum *.iso > file2
(g) sha1sum *.iso >> file2
(h) diff file1 file2
(i) if no difference, then sums check out OK
(j) start ISO write process in K3b, with verify written data checked
(j.1) K3b, of course checks the md5 sum, and it is OK, too
(j.2) write succeeds
(j.3) verify fails (says the original and the written don't match)
(j.3.1) does not give fail until verify secession is complete
(j.3.2) I have not found another error message or any other explanation
3rd ... history ...
(a) I have downloaded 2 DVD ISO's and 4 CD ISO's (and one of the CD's 
twice, as mentioned above)
(b) both DVD files have written and verified OK
(c) 3 of the CD files have written and verified OK
(d) 1 of the CD files (and just that one - the one I have downloaded 
twice) has written successfully, but failed on verify
(d.1) 6 fails on the first download, and 1 on the second ... I may learn 
slow, but I do learn
(d.2) after the 6 fails, I wrote and verified a different CD file just 
to verify that ...
(d.2.1) the drive is still OK
(d.2.2) the blank CD-R's were OK ... a moot point since the other files 
were all writing on this batch of CD-R's

My guess (operative word being guess) is that the K3b software is OK, 
the CD-R's are OK, and the DVD/CD drive is OK

My original statement was that I have never seen this before, and I do 
wonder what it might be.

Hope that isn't TMI
Thanks
Regards
Fred James