At 03/03/2011 02:11 PM, Shi Jin Write: > Hi there, > > Attaching/detachnig virtio disk to a VM used to work fine with RHEL-5 but > with RHEL-6 it seems to have problems. > > Attaching seems to work. For example, I can do > virsh attach-disk <vmname> <qcow2 file name> vdb --driver file --subdriver > qcow2 > However, it generates a bit weird XML: > <disk type='file' device='disk'> > <driver name='file' type='qcow2'/> > <source file='<file>/> > <target dev='vdb' bus='virtio'/> > <alias name='virtio-disk1'/> > <address type='pci' domain='0x0000' bus='0x00' slot='0x07' > function='0x0'/> > </disk> > > In contrary, our original VM system disk has > <disk type='file' device='disk'> > <driver name='qemu' type='qcow2'/> > <source file='<sys disk image>'/> > <target dev='vda' bus='virtio'/> > <alias name='virtio-disk0'/> > <address type='pci' domain='0x0000' bus='0x00' slot='0x04' > function='0x0'/> > </disk> > > Note the different of driver name: qemu vs file. > I think qemu is the proper name to use. This has been mentioned last year on > this list [1]. I wonder if there has already been a proper fix for this > problem. > > More seriously about this is that I am not able to detach the just attached > disk, most likely due to the problem of wrong driver name. > [cloudadmin@test2 ~]$ virsh detach-disk one-52 vdb > error: Failed to detach disk > error: operation failed: detaching virtio-disk1 device failed: Device > 'virtio-disk1' not found This error message is reported by qemu.
I try to reproduce this bug with upstream libvirt and qemu, but it works fine to me: # virsh attach-disk RHEL6RC /var/lib/libvirt/images/test3.img vdb --driver file --subdriver qcow2 Disk attached successfully # virsh detach-disk RHEL6RC vdb Disk detached successfully What is version of libvirt and qemu that you use? > But if I tried to remove the vda which uses qemu as driver name it would work. > [cloudadmin@test2 ~]$ virsh detach-disk one-52 vda > Disk detached successfully > > I also tried with raw disks to attach/detach and saw the same problems. > > Thank you very much. > Shi > > > [1]: http://www.redhat.com/archives/libvir-list/2010-August/msg00449.html > > -- > Shi Jin, PhD > > > > > -- > libvir-list mailing list > [email protected] > https://www.redhat.com/mailman/listinfo/libvir-list > -- libvir-list mailing list [email protected] https://www.redhat.com/mailman/listinfo/libvir-list
