I have found what it is. In respect to:
http://lime- technology.com/wiki/index.php?title=The_Analysis_of_Drive_Issues with the text passage(citing): "Drive Interface Issues These are problems with the cables and connections to the drive, both power and data, or the quality of the power supplied. If your errors match one of these, then almost certainly, your drive is completely fine. There have been many drives returned or thrown out, after numerous errors similar to the following issues, that were entirely the fault of the cables or power or connectors used, NOT the drive itself. " -> You may read on on the linked website for which kernel entries are indicating this. ---------------------------------------------------- I went in the next computer store and came back with a new SATA data and a new SATA energy cable. I changed both against my old ones. I have had runned the system since many days to be sure. -> No ata1 errors anymore with the same harddrive! A deeper look at the cables shows me that the plastic connector of the SATA energy supply to the harddrive was deformed a bit. It was nearly invisible but seems to be enough to interrupt the harddrive and causes this errors. ----------------------------------------------------- So this here was not a problem of qemu-kvm. It was a hard(wired) one. ----------------------------------------------------- I would like to bring this issue up as a blueprint for Ubuntu/apport, because it was a time stealing one which is not easy to identify. The system should inform the user/superuser when there are entries of this type in the kernel log that this affected with the possibility of defect cable or cable connectors to the harddrive. So, for now I close this here as fixed released. ** Changed in: linux (Ubuntu) Status: Confirmed => Fix Released ** Changed in: qemu-kvm (Ubuntu) Status: Confirmed => Fix Released -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/965525 Title: kvm Ubuntu12.04 64bit guest got frozen To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/965525/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
