Secondary Storage GCSE Computing. Objectives… Understand the need for input and output devices. Describe suitable input devices for a wide range of computer.

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Presentation transcript:

Secondary Storage GCSE Computing

Objectives… Understand the need for input and output devices. Describe suitable input devices for a wide range of computer controlled situations. Describe suitable output devices for a wide range of computer controlled situations. Discuss input and output devices for users with specific needs

Secondary Storage All desktop computers and most other computer devices need some secondary storage to store the following items: The operating system. Any programs and applications that the user installs onto the computer. Any files and documents containing the user’s data.

Secondary Storage These cannot be stored in the primary memory. If they were stored in the ROM, they will not be alterable which means the user will not be able to install any programs or modify any files. If they were stored in the RAM, they will be lost every time the computer is switched off.

Secondary Storage When something is to be used, it needs to first be transfered from the secondary storage to the primary memory. This is called ‘loading’ and it is the reason why we say that we are loading a program or loading a file.

Secondary Storage Magnetic devices Optical devices Solid State/Flash devices What are they? How much do they hold? What can they be used for? Advantages/Disadvantages?

Secondary Storage