Because StorPool presents block-based storage volumes, QoS Policies can be applied to VMware datastores as well as Raw Device Mappings (RDMs). This also extends to individual vdisks when Cloud Management Platforms (eg. OpenNebula, OpenStack, CloudStack, and OnApp) are leveraged. For a demonstration of this please view: https://www.youtube.com/watch?v=WZ6UggyVEfg