I forgot: this is on Ubuntu 10.04, Qemu 0.12.3. -- I/O errors with qemu-nbd/qcow2 https://bugs.launchpad.net/bugs/583296 You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU.
Status in QEMU: New Bug description: I tried to open a qcow2 file with qemu-nbd and backup the files in it. After some coping I get lot of I/O errors in dmesg and the system hangs. One time I got even a kernel panic (Of course on a productive Server ;-) ) How to reproduce: 1. Connect nbd to a qcow2 file, a virtual machine mustn't use this file: qemu-nbd --connect=/dev/nbd0 /mnt/qcow/andromeda.qcow2 2. Read some data from /dev/nbd0p1 dd if=/dev/nbd0p1 of=/dev/null bs=1M After a few Seconds till Minutes somethings crash's Attached some dmesg logs
