Hi Wen, Thank you very much. Here are my versoins: [cloudadmin@test2 ~]$ virsh version Compiled against library: libvir 0.8.1 Using library: libvir 0.8.1 Using API: QEMU 0.8.1 Running hypervisor: QEMU 0.12.1 [cloudadmin@test2 ~]$ cat /etc/redhat-release Red Hat Enterprise Linux Server release 6.0 (Santiago) [cloudadmin@test2 ~]$ uname -a Linux test2 2.6.32-71.el6.x86_64 #1 SMP Wed Sep 1 01:33:01 EDT 2010 x86_64 x86_64 x86_64 GNU/Linux Could you please post the "virsh dumpxml" result of the VM after the vdb is attached? Thanks in advance. Shi > > 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 > > libvir-list@xxxxxxxxxx > > https://www.redhat.com/mailman/listinfo/libvir-list > > > > -- libvir-list mailing list libvir-list@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/libvir-list