Western Digital 320 GB AV SATA 3 Gb/s 7200 RPM 8 MB Cache Bulk/OEM AV Hard Drive- WD3200AVJS 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. Optimized for smooth, continuous digital video playback of up to twelve simultaneous HD streams; compatible with the ATA streaming command set Ideal for set-top boxes (PVR, DVR and IPTV), media servers, media centers, and surveillance applications