Storage Devices

• Diskettes - most common 3 1/2” HD - 1.44 MB

  • write protection - window on disk to prevent writing

• Hard Disks - common 540 MB to 4.2 GB

• CDs - 680 MB or more

  • transfer at 150 K per second
  • double-speed - 300 K per second - sound and video
  • quad-speed - 600 K per second - true multimedia

• Tape - usually for backup

  • slow, sequential access

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