One Windows is simply not enough! Call US +1 877 734 6106 to find out Call UK 0800 027 2002 to find out Western Digital Raptor Hard Disk   Specification WD produces the world's most reliable SATA drives. With 1.2 million hours MTBF, enterprise duty cycle, 5-year warranty, next-generation SATA technology, and state-of-the-art vibration tolerance, WD Raptor drives offer the best combination of reliability, high capacity, and performance for enterprise applications. Key Features: Reliable -- designed and manufactured to enterprise-class standards to provide enterprise reliability in high duty cycle environments. With 1.2 million hours MTBF, these drives have the highest available reliability rating on a high-capacity drive. Fast -- with a next-generation SATA interface, 1.5 Gb/s data transfer rate, native command queuing (NCQ), and 16 MB cache, these drives deliver optimum performance. RAID-specific, time-limited error recovery (TLER) -- a feature unique to WD, prevents drive fallout caused by the extended hard drive error-recovery processes common to desktop drives. Rotary Acceleration Feed Forward (RAFF™) -- optimizes operation and performance when the drives are used in vibration-prone, multidrive systems such as rack-mounted servers or network storage. FlexPower™ -- connector technology that accepts power from either industry-standard or new SATA power supplies. 5-year warranty Buffer Size - 8 MB Capacity - 150 GB Form Factor - 3.5" x 1/3H Hard Drive Type - Internal hard drive Interface Type - Serial ATA-150 Spindle Speed - 10000 rpm