Read/write head of a hard disk

Read/write head of a hard disk

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Caption: Read/write head of a hard disk. Data is recorded on to a computer hard disk by a read-write head on the tip of a metal arm (centre). The arm moves as often as 50 times per second over the spinning magnetised disk or platter without touching it. The read/write head magnetizes and demagnetizes domains on the platter, thereby storing and retrieving bytes of information. Due to the speed of the read/write head, data can be accessed from the hard disk in a fraction of a second. Most hard drives have more than one platter and several read/write heads to increase the amount of information that can be stored.

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Keywords: arm, circuit, circuitry, components, computer data storage, control, controller, electromagnetic, electromagnetism, electronic, electronics, hard disk assembly, high-tech, macrophotograph, magnetic, material, memory, metal, platter, read/write head, store, technology

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