Secondary Storage

Whilst Main Memory is used to run the system, a computer also needs places to store programs and data for longer. The term used to describe these types of media is secondary storage.

Hard drive - GCSE Computer science

Whilst secondary storage is used to store data whilst the power is switched off, it is also used to hold data and programs that are not currently in use. Once the system needs to use these, they are moved into the RAM.

The computer hard drive may also be used for virtual memory if the RAM runs out of space.

Secondary storage is placed into three main catagories: Magnetic, Optical, and Solid State.

Magnetic

Magnetic storage uses a magetic charge to store binary on the media. This can then be read with positive indicating a one, and negative indicating a zero.

Hard disk drives (HDD), floppy disks, and magnetic tape are all examples of magnetic storage.

Optical

Optical media can roughly be descibed as “anything that is read using a laser“. These are usually types of disck.

CDs, DVDs, and Blu-Ray are all examples of types of optical storage.

Solid State

Solid state devices come in a number of formats, with many being built on flash memory technology. Solid state media has no moving parts, and as such is less prone to damage whilst being moved about. It is for this reason that solid state storage is used in so many portable devices.

SSDs, USB sticks, and SD cards are all examples of solid state storage.

To read more about the types & characteristics of secondary storage, click here.

Found this page helpful? Please consider sharing!

Share on facebook
Share on twitter
Share on linkedin
Share on pinterest
Share on reddit
Share on tumblr

Looking for more?

Lesson Plan

Presentation

Not a member yet? Sign Up Here

Or Sign In below

Sign Up For Membership Today

Student Subscription

Online revision resources for individual students
£ 2
50
Monthly
  • Over 100 Topic Introductions
  • Additional topic info
  • Download Revision Resources
  • Quizzes
  • Flash Cards
Student

School Subscription

Online revision resources for whole schools
£ 12
50
Monthly
  • Additional topic info
  • Download Revision Resources
  • Quizzes
  • Flash Cards
  • Lesson Plans
  • Lesson Presentations
  • 50 student accounts included
School