Traditional approach to moving data from expensive storage to secondary storage hasn’t worked well in the enterprise. Automated Tiered Storage (ATS) is only available from one vendor today, Compellent. File virtualization has the benefit of being able to move between different storage platforms, for example, from a primary NAS to a data deduplication appliance. The downside to ATS is that it requires a storage system that can support it. If you aren’t ready to part with your existing system or if you need the ability to move data to a different type of storage that is designed for long-term retention.”]