HP SAS enterprise and midline hard drives are designed to deliver better performance and reliability. SAS drives are customized for HP ProLiant, Integrity, storage systems, and system management tools. They are designed and tested to provide tolerance against vibration, as well as thermal and electrical stresses, with firmware that is specifically designed and tested to improve performance and reliability. The 10K and 15K rpm enterprise drives are ideal for mission-critical server and storage applications, while the 7.2K rpm midline drives are better suited for capacity and cost-optimized solutions.