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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