Seagate ST3500830A 500GB UDMA/100 7200RPM 8MB IDE 3.5-Inch Hard Drive Seagate Barracuda 7200.10 ST3500830A 500 GB IDE Hard Drive General Features: 500 GB formatted capacity UDMA/100 data transfer rate 7200 RPM spindle speed 8MB buffer 4.16 ms average latency &lt;11 ms random seek time (read) &lt;12 ms random seek time (write) E-IDE/ATAPI interface Power Specifications: +5V~ 0.72A +12V~ 0.52A Regulatory Approvals: UL CE C-Tic