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120gig PB hard drive only 112gig capacity?

Discussion in 'Macintosh Computers' started by technocoy, Nov 18, 2005.

  1. macrumors 6502a


    What the hell? I know that the capacity is always a bit lower than the listed, but 8gigs? this doesn't make sense... It list my HD's capacity as 111.67 gigabytes. I'm going to have to call apple i guess. damn. what is up with you lately apple? let's keep moving forward, but we also gotta pay attention to the here and now. You are upsetting your loyal user base.

    anyone else get the 120 gig? if i had know this I WOULD have gone with the 100 7200rpm drive.

  2. macrumors 6502


    After being formatted with osx and everything it will be like 8 gigs less. Or at least it was on my computer
  3. macrumors G3


    its formated and has tiger which will lower your total capacity....
  4. macrumors 6502a


    no no...

    after tiger i only have 102gigs. this is the drive itself... in system profiler it lists my drive as only 111.67

    not cool.
  5. macrumors G3


    your forgetting all the applications like all of ilife 05....
  6. Moderator


    Staff Member



    Once again... (sorry, this has been covered a million, bajillion, gazillion times)

    Your math is off, it's not Apple's fault.

    A *byte's math is based on 1024, not on 1000. So your 120GB hard drive, which is listed at 120,000,000,000 bytes.. is actually that number divided by 1024 for kilobytes, then again for megabytes, then again for gigabytes.

    Which means that 120GB is ACTUALLY 111.75GB.

    This is the fault of HARD DRIVE MANUFACTURERS, not Apple.

    Read more about it here: http://en.wikipedia.org/wiki/Hard_drive#.22Marketing.22_capacity_versus_true_capacity

    I will also note that the "missing" space between 111.75GB (my math) and the 111.67GB (from the Finder) is set aside for journalling and partition mapping and whatnot on the hard drive.
  7. macrumors 65816


    I always find it funny how many people complain about this exact problem. If you used that same drive on XP it would be the same way. My iMac has a 250 GB drive but on has a capacity of 233.64 GB. It's the same for everyone.
  8. Moderator


    Staff Member

    Yep, sure is.

    Clearly it's easier to market a 250GB hard drive over a 233.64GB hard drive.. but it's still a fairly dishonest practice.
  9. macrumors 65816


    There's a difference between "formated capacity" and "Advertised Capacity"


    FYI, I have a 100GB drive, and it only lists 93.somthing GB
  10. macrumors 6502a



    yeah, i knew about this, but i guess it's a little exponential... my 60 gig only dropped to like 58 or something. lol. now that i calculate it, it does go way down. that blows.

    oh well, making sure i wasn't crazy, and welcoming myself to the world of higher capacity laptop drives...
  11. macrumors 6502a


    good god

    that really is so busted. well, sorry apple. I still love you like a ho loves crack. I was out of line. (although i have lots of lines in my PB screen).

  12. macrumors regular

    right on yellow

    right on yellow
    not apples fault. do the math.
    every storage drive you use has less capacity than what you would think.
    including all HDDs and flash drives. its only that the difference is prominent when the drive is of a higher capacity.
    the 100 Gb 7200 rpm would have about 93 odd Gb space.

    technocoy my 60GB was 55 something from memory, which is in line with 111/120 and 232.7/250
  13. Moderator


    Staff Member

    Now, THAT is a problem with Apple's QA and needs to be addressed with them.
  14. macrumors 6502


    Well on my 30 GB HD.... (lol) :p

    it doesnt even matter
  15. macrumors 65816


    Call Apple. Yell and threaten to send it back to them and they will likely offer to retroactively discount your purchase by refunding money to your credit card. Be sure to accuse them of false advertising for good measure.
  16. macrumors 65816



    Psst... Picture 3.jpg

  17. macrumors 65816



    Thats whats so funny, 1gb does not equal 1 billion bytes.
  18. macrumors 65816



    Hey, hey. That was a screen shot from Apple's site. I didn't write that. :cool:
  19. Moderator


    Staff Member

    <cough>56</cough> maybe...?
  20. macrumors 603


  21. macrumors 65816


    umm, no. not exponential...it's linear. my 80gb drive shows 74.5GB, which is about 93% of the "advertised" size...same for 56/60 and 111/120.

    yeah, i can't believe how many of these posts always show up...
  22. macrumors 68020


    Like how they sell CRT monitors?

    20" monitor (18.8" viewable)...

    Does dishonesty across the board make you honest?
  23. Administrator/Editor


    Staff Member

    It's not really exponential or linear. It's linear within the GB range...93.1% as stated above. But it's different for other magnitudes. In the MB range, it's 95.4%, while in the TB range, it's 90.9%.

    It comes from the 1024 versus 1000 difference cited above, which compounds with every prefix.

    Wikipedia is your friend: http://en.wikipedia.org/wiki/Byte

    And yes, Apple was correct in their definition of 1 GB being equal to one billion bytes. The problem is that people don't know the difference between a GB and GiB.
  24. macrumors 6502a



    i was poking fun at myself, while also making a sacrcastic point about how many people could respond with how many people post about this.

    lol, thanks for all the responses though, I was freaking out about it at first as i knew there should be a few gigs difference, but i didn't realize it could be 8 until i did the calcs...

    sorry my humor wasn't clear... and it should be pretty obvious i'm not a troll with over 400 posts... HA ha.

    I am still amazed how quikly one can find help on this board though.. after 4 years it still amazes me.

    'preciate it.
  25. Moderator


    Staff Member


    Aaahh.. good call! I forgot about that one. I've not yet scientifically determined if 2 wrong make a right. :)

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