Amazon.com: Western Digital 500 GB Caviar Black SATA 3 Gb/s 7200 RPM 32 MB Cache Bulk/OEM Desktop Hard Drive - WD5001AALS : Electronics
Amazon.com: Western Digital AV-GP WD5000AVDS 500GB 32MB Cache 5400RPM SATA II 3.0Gb/s 3.5 Internal Hard Drive (CCTV DVR, PC, Mac) (Renewed) : Electronics
Amazon.com: Western Digital 1TB 3.5" SATA HDD 7200RPM Internal Desktop Hard Drive for PC/Mac - OEM WD10EZEX 1 TB : Electronics
Amazon.com: Western Digital Blue WD5000AZLX 500GB 7200 RPM 32MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive Bare Drive : Electronics
Amazon.com: Western Digital WD5000LUCT AV 500GB 5400RPM 16MB Cache (7mm) SATA 3.0Gb/s Internal 2.5inch Notebook Hard Drive : Electronics