ubuntu-vm-builder로 생성하면 ide disk임

 

    <disk type='file' device='disk'>
      <driver name='qemu' type='qcow2'/>
          <source file='/root/vm/g1/g1.qcow2'/>
      <target dev='hda' bus='ide'/>
      <address type='drive' controller='0' bus='0' unit='0'/>
    </disk>

 

virtio 사용

    <disk type='file' device='disk'>
      <driver name='qemu' type='qcow2' cache='none' io='native'/>
          <source file='/root/vm/g1/temp.qcow2'/>
      <target dev='vda' bus='virtio'/>
    </disk>