Drivel:  This is a bad product.  It sits between your hosts and your storage devices.  Who wants another device between their data and their hosts?  The concepts behind the product is sound, but this is a pore implementation.  A better approach is using an agent based architecture to accomplish the same goals, eliminating the need to put something between your hosts and their data.

##  Unisys readies Sentinel to watch over storage systems. System directs flow of data across hardware [InfoWorld: Top News]