7 Replies Latest reply: Nov 27, 2007 4:20 PM by GLNHP
hikaru7 Level 1 Level 1 (0 points)
Hi! I have 160 Gb ipod but when I connect to my pc they said 148 Gb even in my ipod said too, what happen with the rest 12 GB, I know they using some for the ipod but I know it's no more then 1 Gb but what happen with the rest 11 Gb lost or this ipod they are no really 160 GB, please answer me soon thank you.

Windows XP
  • Moff Level 1 Level 1 (20 points)
    It's due to the difference in the way that hard drive manufacturers and computers define what a Gigabyte is. I'll probably muck these figures up, but manufactures say that a gigabyte is 1,000,000,000 bytes. Your computer says that a gigabyte is 1,073,741,824 bytes. [edit: retrieved figure from wikipedia]

    Message was edited by: Moff
  • Jeff Bryan Level 9 Level 9 (61,785 points)
    And further info for you.

    All hard drives never have the full advertised storage space, and as a general rule it's around 7% less than stated. Your computer hard drive is exactly the same in this respect.

    It's because hard drive manufacturers calculate hard drive space different than computers actually read it.

    For a full technical explanation, see this.

    Hard disk: Is it missing space?
  • Soapy Level 1 Level 1 (20 points)
    Thanks for this. I was wondering the same. Interesting stuff.
  • poemapaul Level 1 Level 1 (0 points)
    Ok, this is all nice and well, and i understand how the calculations work.
    However, i payed for 80GB, and not for 74,6.
    I didn't calculate my Euro's differently when i had to pay...
    My advice to apple: advertise with 75GB please, it would've saved me a disappointment.

    I'll keep you posted when i hear something from customer support.
  • Jeff Bryan Level 9 Level 9 (61,785 points)
    Doubtless you'll be contacting the manufacturer of your computer too because the hard drive in that has less space than advertised.

    It's true of all hard drives.
  • chadmoore Level 1 Level 1 (0 points)
    I never understood why they couldn't just call it a 145gig ipod or something, then when you crack open the box and start using it and realize you have an extra 3 gigs, you would be happy. Rather than starting it up and saying "WHERE THE HECK ARE THOSE TWELVE GIGS!?!" I mean... my first ipod only had 5 gigs, and now my current one is actually short by more than twice that. I don't really honestly care about the difference, but you'd think they would want to spin it in a way that consumers feel like they're getting a bonus, not getting robbed..

    my .02
  • GLNHP Level 3 Level 3 (850 points)
    Not to beat a dead horse, but to every hard drive manufacturer, OEM, and reseller, 1 billion bytes = 1 gigabyte. Your 160GB iPod contains a hard drive that has 160 billion bytes (give or take). The problem is that computers count in binary (base 2) as opposed to decimal (base 10). This is - and has been - true since the the earliest computers. One gigabyte is actually 2 to the 30th (1,073,741,824) bytes. My 160GB PC hard drive reports a formatted capacity of 149GB. I'm willing to bet that your 500GB drives are reported by Windows as having only about 465GB. Yes, it's all marketing - hard drive manufacturers should advertise the capacity as reported by the computers (and back in the day, they did), but Apple is far from alone in this respect. Oh, and your 5gig iPod, really only had about 4.66 gigs.