Secondary Storage

Secondary Storage

1. It is non-volatile storage. It is needed in a computer system to your programs, Operating systems and files.

   • Non-volatile means that the data is not deleted when the computer system has no power connected to it

2. Optical storage

   • Blu-Ray
   • DVD
   • Advantages: Optical storage is very cost effective and portable compared to magnetic or solid state storage.
   • Disadvantages: It can shatter easily unlike Solid State storage where there is no moving parts and it does not hold much storage capacity.

3. Magnetic storage

   • Disadvantages: Magnetic storage has moving parts making it less durable and less portable compared to solid state.
   • Advantage: very high storage compared to solid state.
     • Magnetic storage is also very cost effective as it has a low cost per GB.
   • Disadvantages: slower read/ write speed than solid state.

4. Solid State storage

   • USB drive
   • Very fast read/ write speed compared to magnetic storage
     • It is also very durable as it has no moving parts whereas optical and magnetic storage do.
   • Does not have as much storage capacity as magnetic
     • Is not as cost effective as magnetic because it has a higher cost per GB