Western Digital 250 GB AV 100 Mb/s 7200 RPM 8 MB Cache Bulk/OEM AV Hard Drive- WD2500AVJB Smooth streaming; whisper-quiet acoustics; low-power consumption and thermally optimized operation for unparalleled reliability. Optimized for smooth, continuous digital video playback of up to twelve simultaneous HD streams Ideal for set-top boxes (PVR, DVR and IPTV), media servers, media centers, and surveillance applications