WD  160 GB AV SATA III 7200 RPM 16 MB Cache Bulk/OEM AV Hard Drive (WD1600AVKX) - Amazon Frustration-Free Packaging WD AV hard drives deliver the characteristics electronics manufacturers seek most: smooth streaming; whisper-quiet acoustics; low-power consumption and thermally optimized operation for unparalleled reliability. SilkStream - 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. Ideal for set-top boxes (PVR, DVR and IPTV), media servers, media centers, and surveillance applications. 160 GB capacity holds up to 32,000 digital photos, 40,000 MP3 files, and up to 19 hours of HD video. Ships in Certified Frustration-Free Packaging