My hoster needed a second downtime, to remove the old harddisk (160gb), not sure why he needs that and why it couldn't stay in the server. Sorry again. And there will be a 3rd downtime, because my hoster found a RAID controller in my server which shouldn't be there. And he wants to remove the controller and get me a 3rd downtime. How unprofessional.
Update: The support was very supportive, the issues are resolved and no 3rd downtime needed.