Hello,Possibly a known kernel problem, you may have read past the end of data into the pad sectors of the DVD and gotten garbage at the end of the ISO image. Use isoinfo to determine the correct size of the ISO filesystem, and compare. You can try setting readahead on the DVD reader to zero with blockdev.
anything started with a try to burn Slackware 12.0 from the original DVD to an new medium with different boot settings. I always got corrupted results and didn't know why.
So I started with an "md5sum -c CHECKSUMS.md5" directly on the original media. This resulted in "anything OK".
Now I copied the whole DVD to my hard drive and created an ISO from it. I mounted the ISO locally and my md5sum now results in 5 corrupted files.
--> A Bug in mkisofs?
No, unfortunately not, as a md5sum on the copy, I have created from the original DVD by using "cp -vr" is corrupted, too!
So md5sum on the original DVD is OK, but after copying to my hard drive, several files are corrupted.That's odd, I would expect the data on the disk to just be the wrong size, and get a CRC on that. You might also use readcd to pull the data, that almost always does what it should.
I'm using kernel 2.6.21.5. Distribution is Slackware 12.0Could be anything, in no order dirty lens, bad drive, bad DVD, firmware error, cable, power supply, acpi confused... could even be a poorly handled end of data on the DVD. Not enough info for me to tell, for sure. Trying readcd is cheap, turning off readahead on the DVD drive is easy, if the problem persists you probably want to take it to the mailing list.
All my "partitions" are LVs in LVM2
I also updated the kernel to 2.6.23.12 to test with this one, but I still get corrupted files.
Is this a LVM bug? Do I already have a corrupted LVM filesystem? How to check/fix it? Is this a known kernel bug? Which may be the reason for corrupted files?
I've created a backup of my important data to a second disc to a "real ext2 partition" (without LVM), but this is connected to the same IDE controller and I don't even know if I may still trust my mainboard...
I also get those kernel messages via dmesg:
http://pastebin.org/16537
Thank you very much in advance for any help!I'm not sure I helped, but you now have more and better things about which to be confused. ;-)
Yours
Manuel