Western Digital 500GB Hard Disk Drive
 
Western Digital WD RE2-GP WD5000ABPS - Hard drive - 500 GB - internal - 3.5 - SATA-300 - 7200 rpm - buffer: 16 MB
 
Western Digital WD Caviar GP WD5000AACS - Hard drive - 5
 
Western Digital WD AV WD5000AVJS Hard drive