硬盘原理（HDD principle）.docVIP

硬盘原理（HDD principle） Now the hard disk, either IDE or SCSI, are used in technology, Wen Che Stewart has the following characteristics: 1. Magnetic head, disk and movement mechanism seal. 2. Fixed and high speed rotating disk with smooth surface. 3. The head moves radially along the disk. 4. The magnetic head contacts the disc to start and stop, but when it is working, it is in the flying state without direct contact with the disc. Disk: hard disk disk is to attach magnetic particles to the surface of the aluminum alloy (new material, also useful glass) disc It is divided into several concentric circles called tracks, and on each concentric circle there seems to be an infinite number of permutations Magnets, which represent the states of 0 and 1, respectively. The magnets are arranged when they are affected by the magnetic force of the head The direction will change. The magnetic head is used to control the direction of the specified small magnets so that each small magnet can be used Save information. Disk: the disk of a hard disk consists of a number of disks that overlap and are placed in a sealed box The shaft motor rotates at a high speed, with a speed of 3600450054007200 or more per minute. Magnetic head: the magnetic head of a hard disk used to read or modify magnetic material on a disk. Generally, every magnetic surface will There is a magnetic head, starting at the top, numbering from 0. The magnetic head is in contact with the disk when it stops working, but Flying during work. The magnetic head takes the form of contact start and stop in the landing area of the disk, and the landing zone does not hold any number According to the head in this region, there is no problem of any data damage. When reading data, the disc rotates at high speed due to A sophisticated aerodynamic design of the head motion is performed at which the head is located at a 0.20.5 micron height from the disk data region Degree of flight. Not only the contact with the disk causes the abra