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STORAGE DEVICES - Coggle Diagram

- - - - disk easily damaged/scratched
      - magentic and not magentic parts used to store data magnetically
      - read/write arm
        
        can check if parts are magnetic
        
        can magnetised /de magnetise parts
        
        magnetised = 1
        
        de-magnetised = 0
      - moving parts makes it easier to damage
      - hard to move around due to size
      - life cycle of like 20yrs
        
        normally outdated by the time its done
      - high storage capacity
  - - - very fast read /write speed
        
        (don't hit me)
    - - electron =1
      - no electron = 0
  - - - outdated
      - has pits and lands that don't reflect light and reflect light respectively
        
        therefore pits = 0 and lands =1
- - - - it's called this because it cannot be altered