Secondary Storage

Secondary Storage

1. Optical Storage

   • Advantages
     • Disadvantages
       • Not very durable
       • Limited capacity
     • Cost effective
     • Very portable
   • It is read with a laser. CD's, DVD's and Blu-Ray are examples of this type of storage

2. Solid State

   • Advantages
     • It is the most durable than any other storage
     • It can read and write faster than magnetic storage
   • Disadvantages
     • Less cost effective
     • It has a limited lifespan
   • It uses microchips to store data instead of magnetised disks
   • It does not contain any moving parts

3. Magnetic storage

   • Advantages
     • Cost effective
     • It has a larger capacity than solid state
   • Disadvantages
     • Not as durable due to moving parts
     • Reads/writes data slower in comparison to solid state
   • Data is stored by magnetising the surface of flat circular plates called platters
   • The platters rotate at a high speed

4. Secondary storage is non volatile which means the data does not get deleted when the computer turns off

5. A computer system stores data, programs, the operating system and files