How computers work: How hard disc works?

How computers work: How hard disc works?: "How hard disc works?
The area of data storage is a set of flat plates coated with magnetized lining.Data is stored as a series of coordinated magnetized area inside lining, called "domains". To read the data or write, a device called an executive device moves heads to read or write to position, vertical compared to the disk, while the plates spinning at high speed. Then, the signals are sent to the head, or the head receives signal, which records or reads data."

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