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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