Friday, September 30, 2011

Lasers HDD

Lasers will increase HDD speed 100 times
Today is the era of optical data. Floppy disks and other magnetic media are expelled by the USB flash drives, CDs, DVD and even Blu Ray. But there is a part of your team always remains magnetic. Is your hard drive. There are many advantages in its magnetic origin, ie, magnetic disk drives are much cheaper than flash memory-based. However, there is a huge flaw - speed. Access time of flash memory is much shorter than usual in hard disk drives. However, modern technology made a big step in solving this problem.

Scientists at the University of Nijmegen Radbout really did a wonderful invention. Usually, you need a magnet to change the magnetic polarity of a metal. This is how modern hard disks work. However, scientists thought of a way to change the polarity of the laser pulses. Each laser pulse causes a layer of information on the disk surface to change its value from 0 to 1 and vice versa.

The present invention increased the speed of the hard drive a few hundred times! But there is one limitation - the recording density is much lower than the standard magnetic method. This is because the area that is affected by laser, is about 5 um big. In the next 3-4 years, scientists hope to reach the 10 nm beam, these laser-based hard drives can really compete with the magnetic.

Information technology to improve every day. And the things you once thought impossible are now a reality. Lasers have played an important role in the advancement of portable technology. From the hard disk scanning to laser printers, its intrinsic value is clear. Laptops, even refurbished can be modified to include this technology.

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