For computers to run faster, There is needed to create "solid-state" drives that eliminate the need for moving parts -- essentially making the data move, not the device on which it's stored. Flash-based solid-state disk drives have achieved this, and store information electrically rather than magnetically. However, while they operate much faster than normal hard disks, they last much less time before becoming unreliable, are much more expensive and still run much slower than other parts of a modern computer -- limiting total speed.
Creating a magnetic solid-state drive could overcome all of these problems. One solution being developed is 'racetrack memory', which uses tiny magnetic wires, each one hundreds of times thinner than a human hair, down which magnetic "bits" of data run like racing cars around a track.
Source: [
http://www.sciencedaily.com/releases/2015/11/151103064603.htm ]
