Please enable JavaScript.

Coggle requires JavaScript to display documents.

C&D A-Level (Operating system (types (real time (aircarft, self drive…

- - - - windowns
      - windows nt
    - - aircarft
      - self drive car
  - - - dedicated OS
- - - - os
      - programs
      - data used for programs
  - - - power off
- - - - setup
      - working
  - - - OS
        
        boot strap
        
        kernel
        
        hand control to OS
- - - - use magnetic field
      - types
        
        hdd
        
        can be used in data centres
        
        spinning disks
        
        reader
        
        to read it has magnetic reader
        
        usefull string
        
        1 more item...
        
        magnets
        
        metal grains
        
        grouped together store data
        
        each graiin bit
        
        1 more item...
        
        this is coverted from bits
        
        store
        
        floppy
        
        tape
      - read write head
        
        nanometers
        
        1/1000th mm
    - - shine
        
        laser
        
        reads
        
        land 1
        
        pit 0
        
        starts center
        
        spirals out
        
        1/2 micromter wide
      - plastic
        
        bumps burned on plastic
        
        alluminium layer
    - - stored when power lost
      - data
        
        to blocks on chip
        
        read
        
        written
      - flash
        
        read/written
      - no moving parts