3D storage technology that doubles the hard disk capacity

This year, regardless of movies or games, more and more high-definition, larger and larger, do you think your hard drive is not enough? Want to delete things and not willing to delete, want to buy hard drives and reluctant to purse ... ... Is there a kind of want to shout at the night sky, "pit father ah" impulse?

The principle of a hard disk is to use a magnetic head to read and write on a rotating disk, that is, to rewrite or read the magnetic pole direction of the magnetic powder on the disk. With the advancement of technology, magnetic powder can be made smaller and smaller, and the read-write head can be made more and more fine, so that more storage units can be divided per unit area. So the new hard drive is as big as the old hard drive, but the space can be several times larger.

However, there are limits to all things, magnetic particles can not be infinitely reduced, so someone has developed a new method: not only use the disc's two-dimensional area, we have to look at the three-dimensional!

As shown in the figure, this kind of 3D storage technology adds one layer under the original storage surface with only one layer. The magnetic arrangement direction in the upper layer can be changed from left to right, and the lower layer is changed in two layers. This technology is applied. After the hard disk capacity can be doubled (do not understand the students you directly think of it as a kind of single-sided double-layer DVD on the line).