Secondary Storage

Secondary Storage

1. optical storage

   • advantages
     • Its cost affective
       • not expensive
     • its very portable
       • you can take it every where
   • disadvantages
     • its not very durable
       • doesn't last very long
     • has a limited capacity
       • it has a limit to how much data it can store
     • can easily be scratched
       • not very reliable
   • examples
     • CDs , DVDs and blue-rays are examples
   • least reliable but most portable

2. magnetic

   • advantages
     • cost effective
       • doesn't cost much
     • high capacity
       • it can hold alot of data
   • disadvantages
     • not as durable due to moving parts
       • wont last forever
     • writes data slower
       • so takes longer
   • examples
     • the hard disc inside your pc is probably magnetic
   • highest capacity

3. purpose

   • to store data
     • you can store your work and information

4. solid state

   • advantages
     • durable
       • last longer
     • high read write speed
       • so it is very reliable
   • disadvantage
     • not cost affective
       • cost more
   • example
     • found in iphones , tablets and USB sticks
   • most reliable