nodeEvacInstance nl il ChangeSecondary
                 inst@(Instance.Instance {Instance.diskTemplate = DTDrbd8})
                 gdx avail_nodes =
  evacOneNodeOnly nl il inst gdx avail_nodes
nodeEvacInstance nl il ChangeSecondary
                 inst@(Instance.Instance {Instance.diskTemplate = DTDrbd8})
                 gdx avail_nodes =
  evacOneNodeOnly nl il inst gdx avail_nodes
nodeEvacInstance nl il ChangeSecondary
                 inst@(Instance.Instance {Instance.diskTemplate = DTDrbd8})
                 gdx avail_nodes =
  evacOneNodeOnly nl il inst gdx avail_nodes