Question about disk space

Discussion in 'Mac Pro' started by ghall, Aug 25, 2006.

  1. ghall macrumors 68040

    ghall

    Joined:
    Jun 27, 2006
    Location:
    Rhode Island
    #1
    Okay, this is something I have been wondering for a while now, so I just thought I'd ask. I have an 80 GB hard drive on my MacBook Pro, but the Macintosh HD has only 74.21 GB. Where is the other 5.9 GB? I know it has something to do with formatting, but I'm not entirly sure why this happens.
     
  2. WildCowboy Administrator/Editor

    WildCowboy

    Staff Member

    Joined:
    Jan 20, 2005
    #2
    It has to do with the difference between gigabytes and gibibytes...computers and hard drive manufacturers see things differently. This question gets asked here a lot, so I'll direct you to another thread that answers the question a bit more thoroughly.
     
  3. ghall thread starter macrumors 68040

    ghall

    Joined:
    Jun 27, 2006
    Location:
    Rhode Island
    #3
    Thanks. It still doesn't make sense to me, but I kinda' get what it's about.
     
  4. WildCowboy Administrator/Editor

    WildCowboy

    Staff Member

    Joined:
    Jan 20, 2005
    #4
    It comes from the fact that 1 kB is equal to 1024 bytes...that's how your computer sees it. But hard drive manufacturers like to use base-10 systems, so they call 1 kB equal to 1000 bytes. So there's a 2.4% difference in capacity at the kilobyte level. But this error compounds itself as you continue to go up through prefixes...by the time you get to gigabytes, it's a pretty noticeable amount. It will only get worse as capacities continue to increase.
     

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