Why is my data disk not available in the Create Virtual Machine Role dialog?
In order for a data disk to show up in the UI, the following settings need to be configured in the Virtual Machine Manager library:
The hard disk must have a family name set.
The release field needs to be set in the format x.x.x.x (e.g. 220.127.116.11).
The Operating system: field needs to be set to None.
The Virtualization platform: field should be set to Unknown.
The VHD needs to be exposed to the cloud that the WAP plan is based in.
3 people are following this question.