Secondary Storage

Secondary Storage

1. Optical Storage

   • Advantages
     • Its portable
     • Cost effective
   • Disadvantages
     • Not durable
   • Examples
     • DVD
     • CD
   • Any storage method that is written and read by a laser
   • limited capacity

2. Magnetic storage

   • Advantages
     • High Capacity
     • Cost effective due to having a larger capacity than solid state
   • Disadvantages
     • Slow read/write speed than ss
     • Not as durable due to moving parts
   • Data is stored by magnetising the surface of flat, circular plates called platters. these platters rotate at a very high speed.

3. Solid state storage

   • Uses microchips to store data instead of magnetised disks and do not contain any moving parts.
   • Examples
     • USB stick
     • Micro chip
   • Advantages
     • More durable and can read and write data much faster than magnetic storage.
   • Disadvantages
     • Less cost effective in comparasion to magnetic because it has a smaller capacity.
     • Has a limited read/write lifespan.