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Hard Drive Technology

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The hard drive uses two important principles about the magnetic fields. When we write data onto the hard drive,it uses THE LAW OF ELECTROMAGNETIC INDUCTION and SOME MATERIAL IS MAGNETIC. When we read data from the hard drive, it uses THE LENZ'S LAW. How hard disk drive works: Firstly we should know the two important part of the hard disk drive, 1. platters and media We put all of the data onto the platters. They are inside of the hard drive. There are several pieces of platter in the hard disk drive, maybe three or four. They are made of special material. The material must be strong and light. Because there are high rotation rates, when the hard disk drive working. Traditionally, people often use aluminum because it is a light material. But today, most platters are made from material like glass or ceramic composite. ...read more.


The arm and its movement mechanism are extremely light and fast. The arm on a typical hard-disk drive can move from hub to edge and back up to 50 times per second. It is hard to believe. But it is the truth. Simply, The read and write head is a ferromagnetic core. It can product a variety magnetic fields through a variety current to be able to write data onto the media in ASC2. And also can product variety current though inducing the variety magnetic field on the surface of the platter to read data from the hard disk drive. Secondly, we should know how they work together. Whenever reading or writing, the platters are rotated at a high speed. The head and the media never touch with each other. Even if they are working. Because a little touch can cause an immense damage of head and the media` surface. ...read more.


The hard disk drive is done. When you want to write the data on the media, the posses almost is the same. But the principle is opposite. This time the hard drive receive the code from the CPU and translate it into variety current and the variety current product variety magnetic fields though the read and write head to made the media magnetic. What careers are related to the use of the technology? Electronic design engineer: the engineer can design better read and write head for the hard drive. Structural engineer: the platter run very fast so a good structure for the hard drive is very important. Mechanical engineer: the motor need improve endlessly with the higher rotation of the platter. The more advanced axletree should be found, which can produce less heat. Material engineer: find better magnetic material for the hard drive. Make the thin-film media technology more mature. Aerostatic engineer: calculate the air flow in the hard drive. Make the arm be right height up the platter when the platter is at different speed. ...read more.

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