FUNDAMENTALS OF COMPUTER

Detailed explanation-1: -Hard disk drives contain neodymium-iron-boron magnets. Their role is to control the movements of the heads that read and write data. The data is on the platters and remains unchanged.

Detailed explanation-2: -For hard drives, the magnetic alloys are typically CoPtCr (cobalt+platinum+chromium) with traces of boron or tantalum added at times to improve the stability of magnetic domains.

Detailed explanation-3: -Hard drives uses disks made of magnetic material, called platters, to store information. An electromagnet in the read/write head writes writes information to the disk by magnetizing small sections of the disk, called sectors, in a one direction or another to indicate a 1 or a 0.

Detailed explanation-4: -Voice coil motors for hard disk drives usually have a structure that places a coil between two magnet sheets and drive the suspension arm with the force generated by the magnetic field and the current flowing in the coil. The detection head is mounted on the suspension arm.