Theoretically, almost any storage system and software can be used to build a private storage cloud. But over the past year or so, vendors have come out with new products or re-worked old ones by adding multitenancy and security features that make the products suited to power private storage clouds in the enterprise.

This product guide gives a rundown of the major products in the private cloud storage space, some of which are cloud storage software applications that can run on commodity hardware, while others are integrated hardware/software systems.