[one-users] Upgrade 4.2 to 4.4: System DS missing

[Tobias Brunner]

Hi,

After upgrading from 4.2 to 4.4 an attempt to deploy a new VM fails with 
the error:

FAILURE [VirtualMachineDeploy] cluster [100] does not have any datastore 
of type SYSTEM_DS

The system DS 0 is not assigned to a cluster (anymore, I'm not sure). 
Trying to assign it to the cluster 100 leads to the error:

FAILURE [ClusterAddDatastore] Cannot add object to cluster. Datastore 0 
cannot be added to any cluster

Is it not possible anymore to use DS 0 on a cluster? Do I have to create 
a new system DS? And if yes, how can I migrate the VMs saved in DS 0 to 
the new DS?

Cheers,
Tobias