Tuesday, 1 July 2014

Computer Studies Made Simple : Computer Storage Devices:

Computer Storage Devices


These are devices that are used to store data and programmes permanently.      
 
They are important because the main memory of a computer is not permanent and tends to lose data and programmes when the computer is powered off.

Also the main memory of a computer has limited capacity while these storage devices can store a large amount of data.

Following are common types of storage devices:

Magnetic Disk

Optical Disk

Magnetic Disc:

This includes the most widely used Hard Disk and the older discs such as floppy disc and magnetic tape.

Hard Drive / disc:

This is a type of magnetic disc.

It consists of several circular discs called platters which are used to store data.

A platter in a hard disc is coated with a magnetic material.

The hard disk in most personal computers is fixed inside the system unit.

It is a faster means of data storage and can store a large amount of data upto 500 Giga Bytes – 1 Tera 
Bytes.

It is also safer than most other means of data storage.












1 comment:

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