Storage

Storage

1. Optical

   • A laser light creates marks in a pattern on the disk.
   • A laser light detects where the marks are and translates this into a readable format.
   • Examples of Optical Storage: Blu Ray, DVD ROM, CD ROM.

2. Magnetic

   • Read/ Write move across the medium and change how magnetised that part of the medium is.
   • E.g. one level of magnetism will be a 1, a second will be a 0.
   • Examples of magnetic Storage: Hard Disk Drive, Tape Drives.

3. Solid State

   • This is made of microchips (switches).
   • The state of the switches determine if a 1, or 0 is stored.
   • Examples of Solid State: Solid State Drive, SD Card, USB Memory Stick.