320GB 5400RPM 8MB Cache SATA Hard Disk Drive/HDD for Lenovo Thinkpad R500-2718 R500-2720 R500-2731 R500-2732 R500-2733 SL300-2738 SL400-2743 SL400C-4413 SL410-2842 SL410-2874 SL410K-2842 SL410K-2874 SL500-2746 SL500C-4414 SL510-2847