Secondary Storage

Secondary Storage

1. When considering secondary storage there are three key areas: cost, speed and capacity. This is just how much the storage costs per MB, how quickly it can recall information ad instructions and how much data it can hoild

2. Magnetic

   • Magnet storage requires a magnet and magnetic material. The magnet is used to change the polarity of some sections of the material, giving different patterns of magnetisation. The different patterns represent different binary strings. A magnetic storage device (like hard disk or magnetic tape) may be used because it has a high capacity at a low production cost

3. Optical

   • Optical storage uses a laser to determine the reflection on a disk. The reflection represents 1's and 0's. Because optical disks are cheap to distribute and can be very resistant and still work, they are used for wide stream media districbution.