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Why exactly 4.36 Gigs?

Discussion in 'Video problems with Mac' started by beem237, Mar 15, 2003.

  1. beem237

    beem237 Member

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    I just just wondering if anyone knows why you can only make an exact duplicate of a dvd only if its under 4.36 Gigs? I was always under the impression it would work as long as it was under 4.7. If anyone could give me some insight that would be great.

    Kudos,

    Ty Roc
     
  2. dRD

    dRD I hate titles Staff Member

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    4.7 is "Japanese gigs". Just like if you buy normally a "100GB" HDD, the actual space you get is somewhere around 90GB.

    As everybody knows, in reality kilos -> megs -> gigs goes like this:

    1kB = 1,024B
    1MB = 1,024kB
    1GB = 1,024MB

    But the "Japanese gigs" use 1,000 as a multiplier instead. So, "advertised 4.7GB" is in reality 4,700,000,000bytes, which, in real terms is 4.36GB.
     

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