Toshiba 500GB SATA 6Gb/s 5400rpm 2.5" Internal Hard Drive (PH2050U-1I54) Works with Serial ATA 3GB/s enabled notebook computers Read/Write cache for increased performance Low power consumption with adaptive power modes Internal shock sensor and ramp loading technology to help protect your drive Perpendicular Magnetic Recording (PMR) Technology Tunnel Magneto-Resistive (TMR) Recording Head Technology Native Command Queuing (NCQ) Support 3 Year Limited Warranty