secondary storage

secondary storage

1. purpose

   • Why we use it.
     • Store different things e.g. files and applications.
     • save our work so we always have it

2. magnetic

   • Advantages
     • Affordable even for large files and applications
     • Removable
   • Disadvantages
     • You could take it to another computer to read...

3. solid state

   • Disadvantages
     • Processed while computer is running
     • Not as cost effective
   • Advantages
     • high storage copacity
     • Low cost

4. Optical

   • Created by James T Russel
   • Disadvantages
     • Low powered
     • Low powered laser beam
     • Developed in the 1960s
   • Advantages
     • Mass storage capacity
     • High data stability