What is Hard Disks! How They Stored Data?

How Hard Disks Stored Data?

The hard disks memories store information on one more circular platters (or disks) which are continually spinning. These rotating disks are coated with a magnetic material and stacked with space between them. Information is recorded on the surface of rotating disks by magnetic heads as tiny magnetic spots . These heads are mounted on access arms. Information is recorded in bands. Each band of information on a given disk is called a track.

A hard disk is really a set of stacked “disks,” each of which, like phonograph records, has data recorded electromagnetically in concentric circles or “tracks” on the disk. A “head” (something like a phonograph arm but in a relatively fixed position) records (writes) or reads the information on the tracks. Two heads, one on each side of a disk, read or write the data as the disk spins. Each read or write operation requires that data be located, which is an operation called a “seek.” Concentric circles on the magnetized surface of the magnetic disk are known as Tracks.

The tracks are commonly divided into pie-shaped sections called sectors. In most systems, the minimum quantity of the information which can be transferred is a sector. The subdivision of one disk surface into tracks and sectors.

The tracks on the disk surface are divided into invisible segments known as Sectors.

A motor rotates the disk at a rapid speed. Data are recorded on the tracks of a spinning disk surface and read from the surface by one or more read/write heads.

The hard disks of today have storage capacity measured in Tera bytes(TB), most common being 1TB to 4TB.

About Manish Singh

Hey Mania, Welcome to the Techmenia! I’m Manish Singh, a blogger from Varanasi, UP, India. Here at Techmenia, I write about latest news on technology and science, and also making money online. We also have some knowledge about Health & fitness. So, Stay with us and Subscribe our blog via email don't forget latest update.

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