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[libvirt-users] Error attaching tape drive device to KVM guest


i'm trying to configure a host SCSI device (tape drive) so that it is available in a KVM guest VM, but am receiving an error when attempting to attach the device.  My guest xml has the following scsi controller defined:

<controller type='scsi' index='0' model='virtio-scsi'>
    <alias name='scsi0'/>
    <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/>

I created tapedrive.xml with following contents:

<disk type='block' device='lun' sgio='unfiltered'>
    <driver name='qemu' type='raw' cache='none'/>
    <source dev='/dev/st0'/>
    <target dev='st0' bus='scsi'/>
    <address type='drive' controller='0' bus='0' target='0' unit='0'/>

I then attempt to attach using following command, and receive this error:

# virsh attach-device instance-0000002d tapedrive.xml --config
error: Failed to attach device from tapedrive.xml
error: internal error: Invalid harddisk device name: st0

Does anyone know cause of the error?  In <address> section of tape drive definition I am using type='drive', I tried type='tape' also but same error. is there a different property value I should use here, or general advice for attaching tape drive to KVM guest?  Thanks, Jake

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