Comment 25 for bug 1735839

My perspective is that if curtin introduced a change of behavior on when to create dnames that's breaking current working software, then curtin needs to handle backwards compatibility.

That means that new version of curtin needs to work exactly the same way as it used to for older versions of MAAS.

That is, if no serial or wwn's are present for a disk, curtin should fallback to create dnames the way it did before.