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.
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 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 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 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!
Looking for more?
Sign Up For Membership Today
Computer Science Student
Individual Site License
Topic Introduction Pages
Additional Revision Resources
Exam Question Walkthroughs
Discounted Group Lessons
£2.50 per Month. After your initial payment, your first payment is Free.
Whole School Site License (teacher access)
Up to 50 student accounts (£3 per student, per annum for additional students)
Online Topic Lesson Plans
Differentiated Homework Tasks
Monthly Bundle of Downloadable Resources
Discounted Live Lessons
£12.50 per Month.
|Number of courses||0||0|
|GET IT NOW||GET IT NOW|
The Secondary Storage Doodle Notes provide a structured way for students to revise the areas covered in class in a visual way. Students should be encouraged to colour and add to the notes page being as creative as possible.
There are known benefits to using Doodle Notes (whether structured like these, or independently created):
- Increased Attention
- Reduction of stress levels
- Increased memory for content
- Deeper learning
*scroll to the bottom to download*
Revise with Alexa
- Click here to install the Skill (once only)
- Say “Alexa, open Memory Cards”
Revise With Google Home
- No need to install, just say “Ok Google, talk to Secondary Storage”