code: func vdiskmanager(dest string, size int) error {
  	cmd := exec.Command(vdiskmanbin, "-c", "-t", "0", "-s", fmt.Sprintf("%dMB", size), "-a", "lsilogic", dest)
  	if os.Getenv("MACHINE_DEBUG") != "" {
  		cmd.Stdout = os.Stdout
  		cmd.Stderr = os.Stderr
  	}
  
  	if stdout := cmd.Run(); stdout != nil {
  		if ee, ok := stdout.(*exec.Error); ok && ee == exec.ErrNotFound {
  			return ErrVMRUNNotFound
  		}
  	}
  	return nil
  }
docs: // Make a vmdk disk image with the given size (in MB).