Storage ICT

Storage ICT

1. Primary

   • ROM
     • Non-volatile (contents are permanent)
     • Read Only Memory
     • Cannot be written to
     • Contains the BIOS
   • RAM
     • Volatile (Loses data when the power supply is lost)
     • Stores programs that are currently being used
     • Random Access Memory
     • Can be written to

2. Secondary

   • Contains files, music and applications
   • Solid State
     • USB
       • Small
         • Portable
       • Quite expensive
     • SD
       • Phones
       • Camera
     • SSD
       • Very Expensive
       • Faster Read and Write
       • More durable
       • No moving parts
   • Optical
     • DVD
       • Movies
     • CD
       • Can only be written to once
       • Songs
       • Lowest capacity
     • Blu-Ray
       • High-Definition video
       • Highest storage for optical
     • Light, portable
   • Magnetic
     • Hard Drives
       • Internal
         • OS, programs, files etc
       • Portable
         • Transport files and programs
         • Relatively cheap
       • Moderately cheap
     • Magnetic tape
       • Holds CCTV footage, as it has lots of storage capacity
       • Stores archived data
       • Holds backup data
       • CHEAP
       • Cassette