secondary storage

secondary storage

1. mom volitile storage which stores data permanantly.it is needed in a computor system to store your programs,operating systems and files

   • non volitile storage means that the data is not deleted when the computor system has no power connected to it

2. solid state storage

   • disadvantage
     • less cost effective in comparison to magnetic it is also more engery efficent
   • advantage
     • more durable and can read and write data much faster than magnetic storage

3. optical storage

   • examples
     • any storage method in which data is written and read with a laser .cds dvds and blu ray are examples of this
   • advantage
     • cost effective and very portible compaired to magnetic because it has moving parts
   • disadvantage
     • not very durable and has a limited capacity compaired to magnetic

4. magnetic storage

   • disadvantege
     • not as durable due to moving parts and read and writes data slower in comparison to solid state
   • advantage
     • cost effective compaired to solid state
   • examples
     • data is stored by magnitising the surface of flat circular plates called platters these plates rotate at a very high speed
     • uses microchips to store data instead of magnitised discs and does not contain any moving parts