WD Blue 1TB Mobile Hard Disk Drive - 5400 RPM SATA 6 Gb/s 9.5 MM 2.5 Inch - WD10JPVX 3 IntelliSeek: Calculates optimum seek speeds to lower power consumption, noise and vibration. Data LifeGuard: Advanced algorithms monitor your drive continuously so it stays in optimum health. NoTouch Ramp Load Technology: Safely positions the recording head off the disk surface to protect your data.