Let me make the following information more detailed:
http://pubs.vmware.com/Release_Notes/en/vra/vrealize-automation-701-release-notes.html
- Moving a datastore from one vSphere Storage DRS to another causes the system to delete instead of create a virtual machine*
If you move a datastore from one vSphere Storage DRS cluster to another vSphere Storage DRS cluster and the target cluster's automation level is not automatic, reprovisioning a created machine causes the system to delete the machine with the following error: StoragePlacement: datastore unspecified for disk in sdrs-disabled VM. This issue does not occur if the virtual machine is cloned.
Workaround: Verify that the target cluster's automation level is set to automatic before you move a datastore from one vSphere Storage DRS cluster to another.
The above known issues is related to vRA? This seems to be related to only vSphere environment without vRA.