Memory

Memory

1. RAM

   • Random Access Memory
   • Volitile memory
     • requires power to keep its data
   • Can be read and written too

2. ROM

   • Read only memory
     • Can only be read and not written to
   • tells CPU how to boot up
     • comes on small, factory made chip built into motherboard
   • Non Volitile memory
     • Permanent memory. It keeps its contents even when it has no power

3. Storage

   • Primary Storage
     • Refares to memory areas that the cpu can access very quickly
   • Secondary Storage
     • Where all data is stored when not in use
   • Tertiary Storage
     • Used for storing data for long term purposes. Mainly used for achives and back ups
   • Capacity
     • How much data does it hold
   • Speed
     • How quickly can the data be transfared and read
   • Portability
     • Does the data storage device need to be transported
   • Durability
     • How robust is it?
   • Reliability
     • Does it need to be able to be used over and over again without failing?
   • Solid State drive
     • Most of them used a type of flash memory
     • storage devices with no moving parts
     • Significantly faster read/write times than HDD's
   • Optical Disk
     • Standard CD -- 700 MB
     • DVDs -- 4.7 GB
     • Blu-Rays -- 25 GB