How Data Is Read And Written On A Hard Disk?

1.	How Data Is Read And Written On A Hard Disk?
Answer» In a hard disk information / data is written on the rotating platters by the read and write heads. The heads are not in actual contact with the disk they are actually slightly above the magnetic SURFACE of the platter. The heads DETECTS the magnetization of the platter right below them. The actuator arm aids the heads in covering the platter area. The surface is divided into MICRO sized AREAS known as magnetic domains. Every magnetic DOMAIN has a magnetic dipole which has their own field. The write heads read/write by magnetizing the area. It generates a strong magnetic field for this purpose.

Answer»

In a hard disk information / data is written on the rotating platters by the read and write heads.
The heads are not in actual contact with the disk they are actually slightly above the magnetic SURFACE of the platter.
The heads DETECTS the magnetization of the platter right below them. The actuator arm aids the heads in covering the platter area.
The surface is divided into MICRO sized AREAS known as magnetic domains. Every magnetic DOMAIN has a magnetic dipole which has their own field.
The write heads read/write by magnetizing the area. It generates a strong magnetic field for this purpose.

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