The Hitachi Deskstar 7K500 series 500GB internal, 3.5 Parallel ATA hard drive features a 7,200 RPM rotational speed, 8MB buffer, an ATA-133 interface, and transfers rates of up to 133MB/second. With 500GB of storage capacity and enhancements to enable faster data access and improved data integrity, it's perfect for storage upgrades, Nearline storage, DVD / HDD recorders, digital video surveillance, video editing, home media servers and more. Huge 500GB storage capacity is the highest capacity available in the industry Huge 500GB storage capacity stores up to Approx. 56 hours of HDTV broadcast or Approx. 125,000 high quality, 4 min. MP3 recordings Reliability - Load / unload ramp protects user data when power is removed ECC and CRC protection Data integrity enhancements throughout circuitry Low power mode reduces system heat/cooling requirements and enables industry-leading acoustics Internal thermal sensor improves data integrity Data buffer = 8MB Rotational Speed (rpm) = 7,200 Media transfer rate (max. Mbits/Sec) = 817 Interface transfer rate (max. MB/sec) = 133 Sustained data rate (MB/sec) = 64.8 - 31 (zone 0 - 29) Average seek time (ms) (read, typical) = 8.5