Hard drive the essential part of our computer was invented on September 13, 1956, by the IBM team. It is simply a disk by which we can read or write. New laptops came with the lots of storage spaces due to increasing hard disk memory. Do we purchase hard disk having a capacity of 500 GB but the available space of 476.8 GB Why?

Why hard drive shows less capacity?

When we buy 500 GB Hard disk, then in terms of bytes is 1GB=1000MB=1000KB as by universal formula. But when Windows shows the capacity, it counts 1024 Bytes as 1 KiloByte

A 500 GB hard drive is approximately 500,000,000,000 bytes (500 x 1,000,000,000).

500,000,000,000 / 1,048,576 = 476,837 megabytes (MB) = 465 gigabytes (GB)

Thus, it shows the hard disk capacity as almost 466 GB. That is the reason for showing less capacity. Actually, the capacity is the same as written only the way of calculating the capacity is different which makes a differentiation.

16 Tb hard disk Features

Western Digital’s CEO Michael Cordano launched 16TB hard drives that have passed all their internal tests. It will function  10 to 15 percent faster than current high capacity hard drives. This hard drive is based on the Microwave Assisted Magnetic Recording (MAMR) technology instead of HAMR which uses Heat Assisted Magnetic Recording.

What is MAMR technology?

MAMR technology works on the magnetic write head which contains a spin torque oscillator (STO) which generates microwaves. They lower the surface resistance of the underlying recording media and make writing bits easier.In MAMR, the magnetic write head is modified to also carry a tiny spin torque oscillator (STO) that generates microwaves with a frequency of 20-40GHz.

How  MAMR technology make Hard Drives more efficient?

If we talk about the Hard drives how they can store information then we get to know the information is stored in the metal hairs presented in the disc. The more the metal hairs more we get the capacity of storing information. This is the main process of making this large capacity hard drive works. Conventional Hard drives record information on tiny metal hairs. This metal ions flipped magnetically by the read/write head to represent a 1 or 0. In MAMR to increase the density of storage manufacturers have shrunk the size of those hairs. Now we get more metal hairs in that space to flipped on.

The challenge was that more hairs, more energy they require to handle and therefore chances of getting an error is more. MAMR solves this problem by integrating a Spin Torque Oscillator into the read/write head that outputs a magnetic field which gives the hairs more energy.

MAMR technology makes Hard drives 15% faster than current high capacity hard drives. This 16TB hard drive is first in the market based on the microwave assisted magnetic recording (MAMR) technology. MAMR lets manufacturers increase the density of information stored on the disk, which improves capacity and speed.

HAMR technology also released a hard drive of 16tb. The difference is that instead of using electric energy to flip metal hairs HAMR using laser light. This makes this drive to expensive to purchase.

The 20tb harddrive will launch in the year 2020 said by the company.