Electric Donkey, BT and so on to download the end of the injury does not hurt the hard drive

First, from the working principle of hard disk said

First of all, the working principle of modern hard disk, now the hard disk, whether the IDE or SCSI, using the "Wentzel" technology, have the following characteristics:

1, the magnetic Head, the disc and the movement mechanism seals.

2, fixed and high-speed rotation of the plated disk plate surface smooth.

3, the head along the disc radial movement.

4, the head of the disc contact-type start and stop, but the work is flying State does not have direct contact with the disc.

Platters: The hard disk is the magnetic powder attached to the surface of the disc of the aluminum alloy (new material also useful glass). These magnetic particles are divided into concentric circles called tracks, and on each concentric track there is an infinite number of arbitrarily arranged small magnets, They represent the state of 0 and 1, respectively. When these small magnets are affected by the magnetic force from the head, the direction of the arrangement changes. The magnetic head is used to control the direction of some small magnets, so that each small magnet can be used to store information.

Disk body: The disk body of the hard drive is composed of several platters, these platters overlap together in a sealed box, they rotate at a high speed under the drive of the spindle motor, and its speed is up to 3600,4500,5400,7200 or even more per minute.

Magnetic head: The head of a hard disk is used to read or modify the state of magnetism on a platter, generally speaking, each magnetic field will have a head, starting from the top, numbering from 0. The head is in contact with the disk when it stops working, but it is flying during work. The head takes the form of a contact-type start and stop in the disc's Landing area, The landing area does not hold any data, the head is stopped in this area, there is no problem of damaging any data. When reading data, the disc rotates at high speed, and the magnetic head is in a "flying State"---0.5 microns high in the 0.2 data area due to the delicate aerodynamic design of the disk. No contact with the disk surface caused Wear, and can reliably read the data.

Motor: The motor in the hard drive is brushless motor, in the high-speed bearing support under the mechanical wear is very small, can be continuous work for a long time. The high speed rotating disk produces a significant gyro effect, so working hard drives are not suitable for movement, Otherwise, the bearing workload will be increased. The drive head of the track feeding motor more use of voice coil rotation or linear movement stepper motor, in the feed tracking adjustment to accurately track the disc's track, so in the hard disk work do not have impact collision, moving should be handled with care.