storage devices

storage devices

1. memory

   • used to hold data
   • stored in chips
   • contents of memory are available immediatley
   • two types ROM and RAM

2. RAM (Random Access Memory)

   • volatile(loses contents when power is turned off)
   • contents can be editied by user
   • stores data aslong as power is supplied

3. ROM (Read Only Memory)

   • non volilate (does not lose content when power is turned off
   • contents can not be altered by user
   • used to hold instructions
   • used to hold instructions needed to start the computer

4. backing and secondary storage devices and media

   • used for the storage of data and programs not needed instantly by the computer
   • used to take backups for security purposes

5. memory stick

   • small and portable
   • large storage for size
   • very reilable
   • can easily be lost
   • slow transfer rate

6. magnetic cartridges

   • used for backing up large amounts data
   • huge storage capcity
   • more used for commerical storage

7. optical drive

   • use removable media
   • can be used for backups
   • dvd used for film
   • cd used for music or software

8. CD DRIVES

   • CD RW
   • CD R
   • CD ROM

9. DVD DRIVES

   • DVD ROM
   • DVD RAM
   • DVD R
   • DVD R+W

10. flash memory

    • thin cards used in digitall cameras