500 GB external HDD info

Po Di-Al

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  • Jun 19, 2009
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    TheWetDreamZ.Blogspot.Com
    Yeah!
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    Malinga

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  • Jul 20, 2006
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    mokakda ban reason eka ?

    saralava kiyanavanum Hard Disk vala capacity eka maninne manufacture la 1GB = 1000MB kiyala. eeth Operating System ekedi eeka 1GB = 1024MB kiyalai maninne. eekai othana thiyana venasa.
     
    Dec 17, 2008
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    The metric system goes in the multiples of 1000 (10^3). So Giga is 10^9 in metric system...

    but in computers everything is binary. Therefore it goes in the multiples of 1024 (2^10).

    So 500GB= 500 000 000 000 Bytes in metric system.

    But when it comes to computers

    500 000 000 000/ (1024*1024*1024) = 465.66 GB

    We define the capacity in Metric system so in real world it shows less capacity in the computer..

    Hope this answered your question....
     
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    Deadman_Rox

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    Jun 11, 2009
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    Manufacturers make drives in what is known as a decimal size, where Kilo = 1000

    So for the example take a 10Gb drive which has 10,000,000,000 bytes.


    But a binary Kilobyte has 1024,Bytes, so you have to divide 10,000,000,000 by 1024 ...


    10,000,000,000 Bytes ÷ 1024 = 9765625,Kb


    9765625,Kb ÷ 1024 = 9536,7431640625,Mb (9536,74Mb)


    9536,7431640625Mb ÷ 1024 = 9,31Gb


    (If the manufacturers had made a 10Gb drive with 10737418240,Bytes you would have a full 10Gb)
     

    smother

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  • Jan 27, 2009
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    Six Feet Under
    1GiB = 1024MiB

    1MiB = 1024KiB

    1KiB =1024B

    Therefore ...

    1GiB = 1024 x 1024 x 1024 = 1 073 741 824 bytes

    1GB = 1 000 000 000 bytes

    500GB = 465GiB
    500gb is the nominal capacity, not the actual usable capacity you get.

    When you build a filesystem on the disk there are several factors to consider which you cannot necessarily control under Windows, and there are data structures required which take up some of the space on the disk.

    The filesystem needs to maintain a location to store all the information (block addresses) of where all the files are on your disk , when you create them, and by default the filesystem will be built to accomodate normally a generous number of files.

    In contrast , under Unix/Linux , when you create a file system you can tell it how mush space (overhead) you want to use for this , thus get more usuable space on the disk.

    So , forget about '500gb' or '1Tb' disks , you never get the amount of space you think you will get.
     
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