def METHOD_NAME(self):
    self.assert_no_active_block_jobs()
    result = self.vm.qmp('drive-backup', device='drive0',
                         sync='none', target=target_img)
    self.assert_qmp(result, 'return', {})
    time.sleep(1)
    self.vm.hmp_qemu_io('drive0', 'write -P0x5e 0 512')
    self.vm.hmp_qemu_io('drive0', 'aio_flush')
    # Verify that the original contents exist in the target image.
    event = self.cancel_and_wait()
    self.assert_qmp(event, 'data/type', 'backup')
    self.vm.shutdown()
    time.sleep(1)
    self.assertEqual(-1, qemu_io('-c', 'read -P0x41 0 512', target_img).find("verification failed"))