The Hitachi PK500 extends on the companies reliability and performance leadership. Hitachi standardized features in desktop end entry level server solutions to enable faster transfer rates, scalable performance and quicker boot up times. Features: 500GB Capcacity 8MB buffer size - faster data processing ATA133 / EIDE interface 7200RPM Rotation Speed SMART Command Transport (SCT) - Adaptive error correction Internal thermal sensor - Improves data integrity Brand New w/ 3 Year Warranty Specification: Manufacturer Hitachi Manufacturer Part # 0A37041 Data Storage Formatted Capacity 500GB Data Transfer Rate To/From Media 133 MBps Buffer 8 MB Seek Time Average 8.5 ms Rotational Speed 7200 rpm Interface PATA133 (EIDE) Dimensions (H x W x D) Unit 4 in x 5.8 in x 1 in Weight Unit 1.4 lbs Warranty 3 Year Warranty Includes in the Box Sealed Bulk Pack