WD announces the availability of its third-generation WD® S25 SAS hard drives, serving the performance-optimized, mission-critical enterprise server and storage market. Shipping now, the new 2.5-inch, 10,000 RPM, WD S25 with SAS 6 Gb/s interface hard drives offer IT professionals a more advanced array of ultra-reliable and efficient, high-performance storage, available in capacities of 300 GB, 450 GB, 600 GB, and 900 GB.