Hi list, I've ridden carefully the reported error. Seems to be some features from qcow2 format image (create with a newer version of qemu-kvm) that can't be used with qemu version shipped with centos 6.5. To accomplish my work, I've followed a chain of conversions. I've copied the image on a guest with a newer version of qemu-kvm and converted all qcow2 image in a raw format. Then on CentOS, I've reconverted them in a qcow2 format (this time with supported features) and I've started them without problems. At the end: [qcow2 featured] [conversion qemu 1.7.0] -> [raw] -> [conversion with centos qemu-img] -> [qcow2 supported]. Solved. Il 05/05/2014 12:58, Alessandro Baggi ha scritto: > Hi there, > I'm new to Centos. I've installed version 6.5 x86_64. I'm coming from > slackware/debian utilizzation environment. I'm trying to setup libvirt > and qemu-kvm, but I have some problems. > > I've different vms (2 centos, 2 slackware, 3 Debian) and I'm trying to > import all of them. > I want prefix that all of them was created from debian host and vdisk > had bus=sata and format=qcow2. > > Importing debian I've no problem with the following command: > > > # virt-install -n DEB -r 1024 --vcpus=2 --accelerate --os-type=linux > --os-variant=debianwheezy --disk > path=/path/to/deb.img,format=qcow2,bus=ide,cache=writeback --import > --network=bridge:br0 --vnc -v > > > It starts and works fine. > > Importing Centos 6.5 with the following command: > > # virt-install -n CENT1 -r 1024 --vcpus=2 --os-type=linux > --os-variant=rhel6 --accelerate --disk > path=/path/to/cent.img,format=qcow2,bus=ide,cache=writeback --import > --network=bridge:br0 --vnc -v > > return an error: > > Starting install... > ERROR errore interno Process exited while reading console log output: > char device redirected to /dev/pts/3 > qemu-kvm: -drive > file=/mnt/dati/qemu-system/CENTOS1/cent.img,if=none,id=drive-ide0-0-0,format=qcow2,cache=writeback: > 'drive-ide0-0-0' uses a qcow2 feature which is not supported by this > qemu version: QCOW version 3 > qemu-kvm: -drive > file=/mnt/dati/qemu-system/CENTOS1/cent.img,if=none,id=drive-ide0-0-0,format=qcow2,cache=writeback: > could not open disk image /mnt/dati/qemu-system/CENTOS1/cent.img: > Operation not supported > > Domain installation does not appear to have been successful. > > > I've tried also to remove disk options and set to virtio,scsi. It starts > but says "no bootable disk". > > The same happens with slackware 14.1 without --os-type and --os-variant. > > Always, trying delete cent.img and recreate it, all works with the same > option (but is not so good, because I must reinstall all). > > On my new centos installation I have qemu-kvm-0.12.1.2, on the last > Slackware system I had qemu-1.7.0 and on Debian 1.1.2+dfsg-6+deb7u2. > > I've also tried to reimport them on another system with Slackware and > have no problem. > > Maybe there is a problem with version of qemu-kvm tools or some problem > with img. It's possible? > > I can't get the real problem. Can someone point me in the right direction? > > > Thanks in advance.