Computer Science Revision Resource

Optical Storage, Magnetic Storage and Solid State Storage

Optical Storage

What is optical storage?

It is storage that is read by light, typically lasers. The optical refers to the laser. An example is a DVD. An advantage is they can be read only and a disadvantage is the fact that they are easily damaged.

Magnetic Storage

What is magnetic storage?

It is a storage that is read and written by magnets. The most common examples include credit card strips and hard drives. A lesser known one is magnetic tape. Some advantages are the fact they are very dense and are relatively cheap for storage capacity. Some disadvantages are that they are very fragile and easily corrupted.

Solid State Storage

It is a storage that stores data electronically using flash RAM. The most common examples are in iPads, smart phones, solid state drives and memory sticks. Some advantages are that the are very resilient and they are fast. A disadvantage is the fact that they are expensive.