How come Capacity says 28.1GB and not 32GB?

Discussion in 'iPhone' started by MrMacBookPro, Oct 18, 2012.

  1. MrMacBookPro macrumors 6502

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    #1
    Just found this under "General"- "About"...

    I under stand programs take up space and memory but shouldn't capacity be 32GB? just curious.. thanks
     
  2. rwilliams macrumors 68040

    rwilliams

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    #2
    The operating system and the preloaded Apple apps are taking up that initial difference in free space. It's no different from buying a new hard drive and loading Windows, OS X or Linux on it - the space you have left for storing files and such is going to be less than there was fresh out of the box.
     
  3. MrMacBookPro thread starter macrumors 6502

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  4. darster Suspended

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    Aug 25, 2011
    #4
    Because there are really 1024 MB in a GB. Vendors however, use 1000 MB to a GB. Then add the apps and os and you will have less than 32 GB. In fact with a totally clean phone with nothing on it, your true capacity is 31.25 GB.
     
  5. FieldingMellish Suspended

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    Jun 20, 2010
    #5
    That's a relief. I thought it was another Foxconn debacle during manufacture.
     
  6. vastoholic macrumors 68000

    vastoholic

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    #6
    Was this your first iPhone or smart phone? It's always been this way.
     
  7. skidbubble macrumors 6502

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    #7
    Agreed. And it isn't strictly just phones. Memory cards, hard drives, USB thumb drives, etc. all have less capacity than stated on the box.
     
  8. vastoholic macrumors 68000

    vastoholic

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    #8
    actual-formatted-capacity-less-gate

    I apologize.
     
  9. Surrylic macrumors regular

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    Jun 26, 2010
    #9
    I think you quoted the wrong person, that's not the thread starter :)
     
  10. vastoholic macrumors 68000

    vastoholic

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    #10
    I know, but the other individual seemed ill-informed as well and actually thought it was a manufacturing defect. That's why I quoted him.
     
  11. dasx macrumors 65816

    dasx

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    #11
    They say it's a 32GB device. That's true although they use 10^x instead of 2^y.
    That is:

    Reality (2^y):
    1B = 8 bits.
    1KB = 1B*2^10 = 1024B.
    1MB = 1KB*2^10 = 1024KB.
    1GB = 1MB*2^10 = 1024MB.
    So 32GB = 32 * 1GB = 32 * 1*2^(10*3) = 32 * 1.073.741.824 = 34.359.738.368B

    Now, they tell you it's a 32GB capacity but they use 10^x:
    1B = 8 bits.
    1KB = 1B * 10^3 = 1000KB.
    1MB = 1000KB.
    1GB = 1000MB.
    So 32GB = 32 * 1GB = 32 * 1.000.000.000 = 32.000.000.000B

    Let's calculate how much that actually is:

    32.000.000.000B / 1024 = 31.250.000KB
    31.250.000KB / 1024 = 30517,59MB
    30517,59MB / 1024 = 29,8GB

    So the actual capacity of the 32GB iPhone is 29,8GB. Now add the iOS and some default apps and it'll go down to the 28.1GB you see.
     
  12. fat jez, Oct 18, 2012
    Last edited: Oct 18, 2012

    fat jez macrumors 68000

    fat jez

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    #12
    It's something the hard disk manufacturers started years back. Their marketing departments realised if they used the base 10 to represent capacity instead of base 2, they could market the disks as being bigger than they really were.

    Sadly, this has become a de facto standard, even OSX uses Base 10 to report disk capacity (so it matches what is printed on the label).
     
  13. BFizzzle, Oct 18, 2012
    Last edited: Oct 18, 2012

    BFizzzle macrumors 68020

    BFizzzle

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    #13
    lol he seemed to be making a joke.. hence the
     
  14. Mercenary macrumors 6502a

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  15. megapopular macrumors 6502a

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    #15
    Also keep in mind that future updates for your current phone should be larger files so that number will shrink further. I wonder how large ios 12 will be, 6-8gbs??
     
  16. darngooddesign macrumors G3

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    Atlanta, GA
    #16
    The OS also holds some of the drive space away in the System Partition so even if you fill your phone it has the extra free space it needs to run.
     
  17. vastoholic macrumors 68000

    vastoholic

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    #17
    but....but....he didn't use a smiley......
    How am I supposed to keep up with all this sarcasm and humor if you don't use smiley's?
     
  18. BFizzzle macrumors 68020

    BFizzzle

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    #18
    you are true on that.
    maybe he was serious.sorry didnt mean to come off rude.

    i just dont think anyone who would use the word debacle would be dumb enough to think the reason of smaller amounts gbs than advertised was due to a manufacturing error. (no offense OP)

    maybe its just that im a sarcastic person and read it naturally with sarcasm :p
     
  19. vastoholic macrumors 68000

    vastoholic

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    #19
    You didn't come off rude to me. Don't worry about that. I probably read it too seriously. Oh well. Perhaps I'll never know unless FieldingMellish comes back in here.
     
  20. FieldingMellish Suspended

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    Jun 20, 2010
    #20

    You're kidding me, right?
     
  21. vastoholic macrumors 68000

    vastoholic

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    #21
    and there's my answer. I'm just gonna shut up from now on. :eek: Sorry Fielding.
     

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