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I have to define some stuff for my operating systems class based on a computer ad, and it says the hard disk capacity is "9-in-1." What does that mean?

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up vote 3 down vote accepted

That has nothing to do with the capacity of the drive, but rather it has to do with other features that the enclosure supports.

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Likely it's referring to a memory card/"media" reader that can accept many different kinds of memory card form factors, such as:

  • SecureDigital (SD) cards, including Mini and Micro variants
  • Olympus/Fujifilm xD cards
  • SmartMedia cards
  • Sony Memory Stick, including PRO and or M2 variants

These media readers often sport USB connectors as well so they can accept a USB external hard drive as well.

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