[libvirt] problem attaching/detaching disk

[Shi Jin]

Here is the command
[root at test2 images]# virsh attach-disk 1 /var/lib/libvirt/images/disk.qcow2
 vdb  --driver file --subdriver qcow2
Disk attached successfully

Here is the log I found relevant (too much under debug mode)
15:31:52.902: debug : virEventInterruptLocked:668 : Interrupting
15:31:52.902: debug : qemuMonitorCommandWithHandler:235 : Receive command
reply ret=0 errno=0 30 bytes 'unknown command: 'drive_add'^M
'
15:31:52.902: debug : virEventRunOnce:595 : Poll got 1 event
15:31:52.902: debug : virEventDispatchTimeouts:405 : Dispatch 3
15:31:52.902: debug : qemuMonitorAddDevice:1878 : mon=0x7f3628341370
device=virtio-blk-pci,bus=pci.0,addr=0x6,drive=drive-virtio-disk1,id=virtio-disk1
15:31:52.902: debug : virEventDispatchHandles:450 : Dispatch 8
15:31:52.902: debug : qemuMonitorCommandWithHandler:230 : Send command
'device_add
virtio-blk-pci,bus=pci.0,addr=0x6,drive=drive-virtio-disk1,id=virtio-disk1'
for write with FD -1

Than you very much.

Shi





On Thu, Mar 3, 2011 at 10:12 PM, Wen Congyang <wency at cn.fujitsu.com> wrote:

> At 03/04/2011 01:00 PM, Shi Jin Write:
> >>
> >>
> >>
> >>     <disk type='file' device='disk'>
> >>       <driver name='qemu' type='qcow2' cache='none'/>
> >>      <source file='/var/lib/libvirt/images/rhel6rc_64.img'/>
> >>      <target dev='hda' bus='ide'/>
> >>      <alias name='ide0-0-0'/>
> >>      <address type='drive' controller='0' bus='0' unit='0'/>
> >>    </disk>
> >>    <disk type='file' device='cdrom'>
> >>      <driver name='qemu' type='raw'/>
> >>      <source file='/var/lib/libvirt/images/test.iso'/>
> >>      <target dev='hdc' bus='ide'/>
> >>      <readonly/>
> >>      <alias name='ide0-1-0'/>
> >>      <address type='drive' controller='0' bus='1' unit='0'/>
> >>    </disk>
> >>     <disk type='file' device='disk'>
> >>      <driver name='file' type='qcow2'/>
> >>       <source file='/var/lib/libvirt/images/test3.img'/>
> >>       <target dev='vdb' bus='virtio'/>
> >>       <alias name='virtio-disk1'/>
> >>      <address type='pci' domain='0x0000' bus='0x00' slot='0x06'
> >> function='0x0'/>
> >>    </disk>
> >>    <controller type='ide' index='0'>
> >>      <alias name='ide0'/>
> >>      <address type='pci' domain='0x0000' bus='0x00' slot='0x01'
> >> function='0x1'/>
> >>    </controller>
> >>
> >>
> >> Thank you very much. It is exactly the same output as mine, particularly
> >  <driver name='file' type='qcow2'/>
> > I thought it has to be name='qemu' to detach properly but since you
> didn't
> > have a problem, I am very lost on why mine didn't work.
> >
> > My libvirtd.log shows (with debugging turned on)
> > 14:43:18.965: debug : qemuMonitorCommandWithHandler:235 : Receive command
> > reply ret=0 errno=0 33 bytes 'Device 'virtio-disk1' not found^M
> > '
> > 14:43:18.965: debug : virEventDispatchTimeouts:405 : Dispatch 3
> > 14:43:18.965: debug : virEventDispatchHandles:450 : Dispatch 8
> > 14:43:18.965: error : qemuMonitorTextDelDevice:2314 : operation failed:
> > detaching virtio-disk1 device failed: Device 'virtio-disk1' not found^M
> >
> > Do you know what the "device not found" error means?
>
> It seems attaching virtio-disk1 failed.
> Can you provide the log when you attach virtio-disk1?
>
> Thanks.
> Wen Congyang
>
> >
> > Thanks.
> >
> > Shi
> >
>
>


-- 
Shi Jin, Ph.D.
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