Burn verify error

lord_valarian · December 2, 2009, 10:27pm

When I burned the suse 11.2-64, I checked the verify data on K3B DVD burner. The checksum matched. So, I proceeded to burn the dvd. It burned successfully. When it tried to verify the data on the dvd, it said data verify mismatch. Is it a program bug or or bad dvd?

Also, the printer tool box is no longer visible from suse 11.1

vader95 · December 2, 2009, 10:29pm

Did you check to see if all the files were burnt. Also, if you have a windows terminal it might be easier to burn the disk on windows, it always was for me.

Barry_Nichols · December 2, 2009, 10:54pm

Hi,

If the md5sum was, correct the iso file is fine.

If it didn’t verify after burning, either the disk is damaged or the write wasn’t successful.

Maybe you could try writing at a slower speed.

With regards to using Windows, I disagree; openSUSE is far superior to Windows.

Regards,
Barry.

vader95 · December 2, 2009, 11:31pm

I respect your opinion, but it all depends on what you need to do.

Vader95

ken_yap · December 2, 2009, 11:39pm

I wouldn’t go so far as to claim that Linux is best for everybody, but I will happily assert that I have never needed to do any CD/DVD burns with anything other than Linux. If it fails, it’s usually one of: bad media, too high a speed for that brand of media, accidentally killing the controlling window for k3b, or bad drive, in that order of frequency.

gogalthorp · December 3, 2009, 4:13am

Same thing happened here 11.2 64bit

burned an ISO tried 3 times bad sector reported by verify on on each try (around sector 250K I think each time the same number) Disks were bad would not run. Could be that I just had 3 bad disks in a row but…

booted to 10.2 64bit(still on old drive) burned it there were no problems, same hardware.

I think there might be a problem with 64bit K3b

I had used to before but with a small data disk files about 6 meg. Had no problems with those.

michael_cheah · December 3, 2009, 4:58am

Happened to me before when using K3B in 11.1. Turns out to be K3B problem in verifying the burned disk. The disk is fine, burned no problem.

You can try to make an iso from the burned disk, compute the md5, and compare with the original iso. If they match then you should not have anything to worry about.

sylerner · December 3, 2009, 5:07am

A few pointers when verifying a CD/DVD after burning:

Always unmount the disk before checking
Because sometimes there are a few otherwise harmless extra sectors written in the process of closing out a disk (depending on program used, timing, phase of the moon, etc.), you should use isoinfo to find the number of sectors from the disk, then limit dd to the proper count to avoid reading any junk that may be at the end of the disk. (See Md5sum of Burned CDs for details)

Hope this helps.

j_xavier · December 3, 2009, 7:33am

i’ve burned a lot of discs over the last few years, and the problem you are experiencing is common, the method that k3b uses to verify data is not compatible with a disc that is “boot-able”.

Any disc you burn that has a boot sector will most likely fail verification, and the previous method of md5sum checking is the only method i know to guarantee that the burn was correct.

this is not a issue with k3b, Nero does it too in windows.

hope it sets your mind at ease. i wish i could give you the precise technical reason for it, but frankly i never took the time to research it.

lord_valarian · December 3, 2009, 9:24pm

I figured it might be a K3B bug. So, I burned the DVD. It worked fine. The printer didn’t install, but I left the modem off for some reason. I’m just going to do an upgrade install. That should fix it. Thanks.

Also, linux is far superior to mswin in security, free software, and open office. MSwin is superior in gaming. I only use mswin when I want to play games. For everything else, I use linux.

Thanks to all who made opensuse possible.

vader95 · December 3, 2009, 10:06pm

I use nero to burn my disks and it always verifies it fine.

AdmiralFubar · December 4, 2009, 12:13am

Are you labeling your disks before or after the burning? I’ve found that if you write on the label side before the burn then your disk most likely will burn incorrectly.
took me a while to pin down why i was having such troubles on my system. I would sometimes label before the burn and have the disc verified as bad.

gogalthorp · December 4, 2009, 3:04am

nope no label or writing.

The iso I was burning was Ubuntu and the burn was bad the disks would not run. Burning from 10.2 on the same machine and all was good Ubuntu booted fine from the CD. Same batch of HP brand CDs

Have not tried a DVD though I did burn the 11.2 DVD from the 10.2 install originally