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What are Magnetic Disks in DBMS?

Magnetic Disks make use of the theory of magnetization to store or save information. Hard disks include metal disks coated with magnetizable material. These disks are placed perpendicularly on a spindle. A read/write head moves in between the disks and is used to magnetize or de-magnetize the spot under it. A magnetized spot can be recognized as 0 (zero) or 1 (one).


Hard disks are formatted in a well-defined order to store and save data efficiently. A hard disk plate has many concentric circles on it, known as tracks. Every track is additional separated into sectors. A sector on a hard disk usually stores 512 bytes of data.

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