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Storage System in DBMS

Databases are stored or saved in file formats, which hold records. The real data in Databases is stored or saved in an electromagnetic format.

Storage Classification:

Primary Storage: The memory storage that is directly and easily accessible to the CPU comes under this kind. This storage is normally very small, ultra-fast, and volatile. Primary storage needs uninterrupted power supply in order to maintain or preserve its state. In case of a power breakdown, all its data is lost.

Secondary Storage: Secondary storage devices are generally used to store and save data for future use or as backup. Secondary storage consists of memory devices that are not part of the CPU chipset or motherboard, for instance, magnetic disks, optical disks (DVD, CD, and so on), hard disks, flash drives etc.

Tertiary Storage: Tertiary storage is normally used to store and save huge volumes of data. In view of the fact that such storage devices are peripheral to the computer system, they are the slowest in speed. These storage devices are regularly used to take the back up of an entire system. Optical disks and magnetic tapes are broadly used as tertiary storage.

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