Hello, in another mail list with another issue I had problems with HTML content. Due no response I send my question in PLAIN/TEXT again. Bye Markus -------- Original-Nachricht -------- Betreff: Connecting disks to controller virtio-scsi of qemu/kvm Datum: Wed, 05 Feb 2014 18:37:06 +0100 Von: chickenmarkus@freenet.de An: libvirt-users@redhat.com Hello, I try to use the virtio-scsi driver to use my disks. But my setup at first: * in general Debian Wheezy * Kernel: 3.11-0.bpo.2-amd64 (http://packages.debian.org/wheezy-backports/linux-image-3.11-0.bpo.2-amd64) * Qemu-KVM: 1.7.0 (http://packages.debian.org/jessie/qemu-kvm) * Virsh 1.2.1 (http://packages.debian.org/jessie/libvirt-bin) The new kernel and dirty things from Jessie are for discard support (also not working with current configuration despite thin volumes with working discard). Once I have the this "new" qemu version, why not to use virtio... Every disk with target bus "scsi" gets an own scsi-hd device. Libvirt ignores the scsi controller of type virtio-scsi. Here is a XML snippet: <devices> <controller type='scsi' model='virtio-scsi' index="0"/> <disk type="block" device="disk"> <source dev="/dev/ssd0/sarabi"/> <driver discard="unmap"/> <target dev="sda" bus="scsi"/> <address type="drive" controller="0" bus=0/> </disk> </devices> This creates the virtio-scsi controller (verified by lspci in guest) but do not "connect" the disks to it. The resulting command line looks following: kvm [...] -device virtio-scsi-pci,id=scsi0,bus=pci.0,addr=0x5 -drive file=/dev/ssd0/sarabi,if=none,id=drive-scsi0-0-0-0,format=raw,discard=unmap -device scsi-hd,bus=scsi0.0,channel=0,scsi-id=0,lun=0,drive=drive-scsi0-0-0-0,id=scsi0-0-0-0,bootindex=2 [...] How get my disk to run over virtio-scsi? Or did I found something like a bug? Bye Markus