sentences:  A drive in the process of being spun up needs more energy input than a drive that is already spinning at operation speeds, since more effort is required for the electric motor to accelerate the platters, as opposed to maintaining their speed.In computers with multiple hard drives, a method called staggered spin-up can be employed to prevent the excessive power-consumption of spin-up, which may result in a power shortage.Power consumption during spin-up is often the highest power draw of all of the different operating states of a hard disk drive.