Kopieren und bearbeiten

Unit 1.3 Storage

Beschreibung

My Computing Unit 1.3 Mind Map
Mathew Wheatley
Mindmap von Mathew Wheatley, aktualisiert more than 1 year ago
Mathew Wheatley
Erstellt von Mathew Wheatley vor fast 7 Jahre
243
3
0

Zusammenfassung der Ressource

Unit 1.3 Storage
  1. Characteristics of storage devices
    1. Capacity
      1. Speed
        1. Portability
          1. Durabilty
            1. Cost
              1. Reliabilty
              2. Data Capacity
                1. Sound
                  1. bytesPerSample * samplesPerSecond * channels * duration = size
                  2. Images
                    1. (Number of pixels * Number of bytes per pixel) + 10% for any overheads
                    2. Text Files
                      1. 1 byte per character + 10% for any overheads
                    3. Storage Units
                      1. Past a byte tradititonally they go up x1,024 each time but in exams just use x1,000
                        1. Bits (1 or 0), Smallest
                          1. Nibble, 4 bits
                            1. Byte, 8 bits
                              1. Kilobyte (KB), 1,000 bytes
                                1. Megabyte (MB), 1,000 KB
                                  1. Gigabyte (GB), 1,000 MB
                                    1. Terabyte (TB), 1,000 GB
                                      1. Pettabyte (PB), 1,000 TB, this is rare but there are even larger!
                                      2. Data Types
                                        1. Text = 1B/charcater
                                          1. Integer = 4/8B
                                            1. Real = 4/8B
                                              1. Boolean = 1B
                                                1. Date = 8B
                                                2. Forms of Storage
                                                  1. Magnetic
                                                    1. Read/write makes certain parts more/less magnetised
                                                      1. How magnetised each part is represents a 1 or 0
                                                      2. Optical
                                                        1. A laser light leaves markings on a disk
                                                          1. Another laser scans these and makes them into a readable format
                                                          2. Solid State
                                                            1. Made of microchips
                                                              1. The state of each chip represents a 1 or 0
                                                              2. Secondary
                                                                1. We need this storage to save data ready for future use
                                                                  1. We need it to interact with computers
                                                                    1. It lets us use software
                                                                      1. Without it, you couldn't store data and so would need to redownload everything with every boot up
                                                                        1. It's needed for more Capacity.
                                                                          1. It's also used for Backing-Up data.
                                                                        Zusammenfassung anzeigen Zusammenfassung ausblenden

                                                                        Möchten Sie kostenlos Ihre eigenen Mindmaps mit GoConqr erstellen? Mehr erfahren.

                                                                        ähnlicher Inhalt

                                                                        Types and Components of Computer Systems
                                                                        Jess Peason
                                                                        Input Devices
                                                                        Jess Peason
                                                                        Output Devices
                                                                        Jess Peason
                                                                        Computing
                                                                        Kwame Oteng-Adusei
                                                                        Pack of playing cards answer
                                                                        Karl Taylor
                                                                        Code Challenge Flow Chart
                                                                        Charlotte Hilton
                                                                        Memory
                                                                        Jack Willson
                                                                        Computer Systems
                                                                        Beth Barnes
                                                                        Data Representation
                                                                        loz .
                                                                        Computing Hardware - CPU and Memory
                                                                        ollietablet123
                                                                        Computer Systems
                                                                        lisawinkler10
                                                                        Bibliothek durchsuchen