1.2 Secondary storage Flashcards
Volatile
Contents lost when computer is shut down
Non-Volatile
Contents not lost when computer is shut down
Purpose of RAM
holds fast and temporary data that is used for active tasks
purpose of ROM
holds permanent and crucial system data
Virtual memory
allows data that is not currently being used to be transferred to the hard disk when ram is full
the need for primary storage
Faster to reach then secondary
the need for secondary storage
Holds data not currently in use
examples of optical storage
Cds, dvds, blue ray
examples of magnetic storage
Hard disk, tape
example of a solid state drive
USB
advantages of optical memory
Cheap, lightweight, portable
advantages of magnetic memory
High storage, quick
advantages of solid state drives
very fast, durable, reliable
disadvantages of optical memory
Prone to scratch, low capacity, slow
disadvantages of magnetic memory
Moving parts, better defragmented