Western Digital WD5000LPZX 500 GB 2.5,WD Blue 500GB Desktop Hard Disk Drive - 7200 RPM Class SATA 6Gb/s 32MB Cache 3.5 Inch - WD5000AZLX,Amazon.com: HP 500GB 7.2K RPM SATA3 3.5 INCH WD Caviar Blue 6GB/S 16MB Cache Hard Drive. WD5000AAKX-606CA0 : Electronics,WD Blue 500GB Desktop Hard Disk Drive - 7200 RPM Class SATA 6Gb/s 32MB Cache 3.5 Inch - WD5000AZLX,WD Blue WD5000LPZX 500 GB Hard Drive - 2.5