A data storage and protection system includes secondary storage and at least one instance of a high efficiency storage application. The redundant vias are formed on one metal level in a stacked via metal fuse structure to force failures to occur in the metal level that does not have the redundant vias. An inert gas such as nitrogen and argon is added to the autoclave when the pressure is lower than 100 psi in the course of the reaction. The subtraction module determines a difference between the first and second angles.