ST3500830A Seagate Barracuda 7200.10 500GB 7200RPM Hard Drive
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Amazon.com: Seagate Barracuda 7200.10 Hard Drive - 250GB, Ultra ATA/100, 3.5", 8MB, 7200RPM - Internal Hard Drive : Electronics
Seagate BarraCuda 7200.10 ST3500630AS 500GB 7200 RPM 16MB Cache SATA 3.0Gb/s 3.5" Hard Drive (Perpendicular Recording) Bare Drive - Newegg.com