The 160GB WD AV PATA hard drive combines optimized AV performance with best-in-class power consumption and thermally optimized operation, enabling unparalleled cost of ownership for manufacturers of digital video recording devices. This drive has been tested for compatibility in a broad range of AV products including set top boxes, DVD recorders, and mainstream surveillance systems. WD AV drives are reliable and quiet. Noise levels have been minimized to less than one sone - virtually below the threshold of human hearing. And with an MTBF of 1 million hours, they are designed to last in high temperature always-on streaming digital audio/video environments such as PVR/DVR, DVR recorders and surveillance video recorders. SilkStream technology is optimized for smooth, continuous digital video playback of up to twelve simultaneous HD streams. SilkStream is compatible with the ATA streaming command set so CE customers can use standard streaming management and error recovery options.