Quota for storage classifications
A quota system similar to what is in place for memory and cpu to govern how much space a user or a subscription from Azure Pack is able to use on different classifications of storage. E.G. User A wants high speed storage for VMs and some low speed storage for general data, so this user gets 80GB of "Silver" tier storage and 300GB of "Bronze tier. This would also need to be accompanied by the ability to select where a VM's disk are placed during provisioning through the Azure pack portal or from VMM.