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Re: [libvirt] problem attaching/detaching disk



Here is the command
[root 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 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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