IAAS-3: Self-service acquire and use a hosted storage volume

Executive Summary: 
An XSEDE-allocated researcher needs exclusive access to a hosted storage volume that satisfies a specific set of requirements.
User Importance Summary: 
Researchers are increasingly using externally hosted ("cloud") virtual machines to extend their computing environments without requiring capital investment.
Target Communities and Sizes: 
Researchers - O(1000) Science gateways - O(10)