Apple Macbooks use what they call Sudden Motion Sensor and Lenovo Laptops use what they call Active Protection Service.What theses services are suppose to do is to protect from shock or sudden vibration or even rapid movement. Basically a sensor inside is suppose to trigger when the above conditions occur and put a break on a parking break so to speak. This disengages the drive disk heads from the hard disk platter preventing data lose and drive damage from disk head crash. I don't see this service mentioned in most other laptops and wonder what value it actual serves,unless you drop your laptop often or live in a area prone to earth quakes. In some cases the service needs to be disabled for example a music recording studio subject to vibrations or perhaps a night club.So in this case what stops data lose or disk damage.