Most array-based SAN management tools are deficient in their ability to detect and help remediate storage network performance problems. Organizations in high performance, high growth SAN environments should evaluate heterogeneous tools such as Virtual Instruments NetWisdom which can provide valuable metrics, trending data and end-to-end visibility on performance bottlenecks. Tools like NetApp's SANscreen are complimentary and can simplify change management and capacity planning. The ROI of these tools will be a function of the size of the SAN, its growth rate, and the value of applications to the business.