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Storage devises

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Storage devises Storage devises Presentation Transcript

  • STORAGE DEVICES By, MARIE AMIRTHARAJ. F.
  • PENDRIVE Internals of a typical USB flash drive 1 USB connector 2 USB mass storage controller device 3 Test points 4 Flash memory chip 5 Crystal oscillator 6 LED 7 Write-protect switch (Optional) 8 Space for second flash memory chip
  • MEMORY CARD
  • RANDOM ACCESS MEMORY
  • HARD DISK DRIVE
  • FLOPPY DISK 8-inch, 5¼-inch, and 3½-inch floppy disks
  • COMPACT DISK
    • Diagram of CD layers.
    • A polycarbonate disc layer has the data encoded by using bumps .
    • A reflective layer reflects the laser back.
    • A lacquer layer is used to prevent oxidation
    • Artwork is screen printed on the top of the disc.
    • A laser beam reads the polycarbonate disc, is reflected back, and read by the player.
  • DIGITAL VERSATILE DISK