High Performance Tier (also known as High Performance Tier Mode) is an optional upgrade that can increase the performance of MD3200 and MD3220 series arrays that have a high drive count, Solid state drives (SSDs) or high data transfer workloads. This implementation is based on an enhanced firmware algorithm and does not require any new hardware dependencies. Several factors will determine the potential performance increase, including the array configuration, host, operating system, HBA, number and types of drives, and application workload.