harddrive general question

Discussion in 'Windows Desktop Systems' started by celticfan11, Sep 18, 2003.

  1. celticfan11

    celticfan11 Moderator

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    when you buy a 120 GIG harddrive
    you format it and it is 111GB and a 60 will be 56 gig
    etc why is this??? does this have to do with bits and byes or something?

    also when you right clikc a file
    it will say size of the file
    then it will say size on disk
    what is the difference between the 2?
     
  2. JJB6486

    JJB6486 Retired Mod Political User

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    File Allocation Tables and other indexing information is created during formatting, and takes up a small portion of the disk.

    JJB
     
  3. Terrahertz

    Terrahertz Extinction Agenda Political User Folding Team

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    If 8 gigs is a small portion Im afraid to find out what large is :)
     
  4. cpugeniusmv

    cpugeniusmv Computer Genius

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    no....

    it's just different viewpoint...

    HD manufacturer: 1 gig = 1000 MB
    Windows, everything else: 1 gig = 1024 MB
     
  5. celticfan11

    celticfan11 Moderator

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    ig 1 gig =1024 mg
    then 120 gigs would end up as more in windows not less
    rite?
     
  6. cpugeniusmv

    cpugeniusmv Computer Genius

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    okay, hard drive manufacturer makes a 120 gb drive (120000 MB)

    you install windows on it, windows wants to see how big it is in GB, so... 120000/1024 = 117.1875 GB

    see it now?
     
  7. Petros

    Petros Thief IV

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    Actual number of bytes on the disk:
    120,000,000,000
    and 1,000 bytes is 1KB in the strictest sense of the prefix "kilo".


    But Windows says that 1024 bytes=1 kb. So Windows does this:

    120,000,000,000/1024=117,187,500 bytes, or 117.1875 GB.

    EDIT: DOH! Ya beat me! :p
     
  8. cpugeniusmv

    cpugeniusmv Computer Genius

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    heh...

    gotta love calc
     
  9. j79zlr

    j79zlr Glaanies script monkey Political User

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    actually, 120 GB is 120,000,000,000 bytes, and would show up as 120,000,000,000/1024/1024/1024 = 111.75GB
     
  10. Petros

    Petros Thief IV

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    Glad we got that cleared up :)
     
  11. Hipster Doofus

    Hipster Doofus Good grief Charlie Brown

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    Too early in the morning for me. :p :D
     
  12. chris

    chris Free to Fly

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    My 120gb Maxtor drive formatted comes to 114.49Gb
     
  13. Zedric

    Zedric NTFS Guru Folding Team

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    The "file size" vs. "size on disk" has to do with clusters. The disk is devided into clusters of a certain size, say 8kb. Only one file can be in one cluster, so if the file is smaller than 8k, there will be some wasted space.

    So "file size" is the acctual file size, whereas "size on disk" is the file size plus the extra slack space.
     
  14. celticfan11

    celticfan11 Moderator

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  15. Zedric

    Zedric NTFS Guru Folding Team

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    Feels a bit strange. I mean, the manufacturers have been counting like this for 20 years or so.

    Not that anyone would notice before the disk became pretty large, >20GB or so. :)
     
  16. LeeJend

    LeeJend Moderator

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    LATE BREAKING NEWS ON THIS THREAD!

    Seems 4 guys in LA have filed a suit against Dell, IBM, Gateway, etc. They are claiming damages for fraud because the companies' 120 gig HD is actually only 113 gig. They hope to take the suit to class action status.

    I'd drop the link but can't find it now. Bummer.

    I'm really excited, this means the companies will end up paying 100's of millions of dollars which will be put into a fund for distribution back to us all. Just like with the CD price fixing scam where we all DIDN'T get money back....................
     
  17. Zedric

    Zedric NTFS Guru Folding Team

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    Oh brilliant. This means they have to pay tons of money we will never see any of and then have to increase their prices to compensate. Brilliant. :mad: