GetDiskFreeSpace Windows API fails on windows 2000

This is a discussion on GetDiskFreeSpace Windows API fails on windows 2000 within the Windows Programming forums, part of the Platform Specific Boards category; Hi All, I need to calculate the cluster size using my program. Windows provides API - GetDiskFreeSpace, to serve the ...

  1. #1
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    GetDiskFreeSpace Windows API fails on windows 2000

    Hi All,
    I need to calculate the cluster size using my program.
    Windows provides API - GetDiskFreeSpace, to serve the purpose.
    But the API fails on windows 2000 host giving the following error-
    --------------------
    ERROR_DIR_NOT_ROOT 144 (0x90) :The directory is not a subdirectory of the root directory.
    --------------------
    The same program runs successfully on windows 2003 and above.

    Does anyone knows the solution of this problem?

  2. #2
    and the hat of int overfl Salem's Avatar
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    The error message seems pretty self-explanatory to me.
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    Algorithm Dissector iMalc's Avatar
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    What are you passing as the first parameter?

    Your should really use GetDiskFreeSpaceEx anyway.
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    Quote Originally Posted by iMalc View Post
    What are you passing as the first parameter?

    Your should really use GetDiskFreeSpaceEx anyway.
    Hi iMalc!,
    I can't use GetDiskFreeSpaceEx because i need cluster size.
    Is there any way to calculate cluster size, other than GetDiskFreeSpace ?
    Last edited by dnyampawar; 06-29-2009 at 01:19 AM.

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    Hi,

    Just to make the qustion more clear-

    Here is my code-
    -----------------------------------------------------------------------------------------------------------
    Code:
    #include "stdafx.h"
    
    int _tmain(int argc, _TCHAR* argv[])
    {
    DWORD SectorsPerCluster, BytesPerSector, FreeClusters, TotalClusters;
    
    if (GetDiskFreeSpace(argv[1], &SectorsPerCluster, &BytesPerSector, &FreeClusters, &TotalClusters))
    {
    printf ("GetDiskFreeSpace Success\n");
    }
    else
    {
    printf ("GetDiskFreeSpace Failed : '%d'\n", GetLastError ());
    }
    
    return 0;
    }
    ----------------------------------------------------------------------------------------------------------

    basically, using win2k host , i am trying to access file/directory resided on netapp volume from using UNC path.

    argv[1] is my case is " \\?\UNC\netapp2704\aniket\tempQtree\" for which the API is failing(error code 144).

    whereas, I am able to access " \\netapp2704\aniket\tempQtree\" from file explorer.

    "tempQtree" is qtree on share "aniket".

    The GetDiskFreeSpace API succeeds on the path " \\?\UNC\netapp2704\aniket\ ".

    Hope this clears my question. Please let me know if any additional inputs required.

  6. #6
    C++まいる!Cをこわせ!
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    GetDiskFreeSpace works on drives, not directories.
    So it must be a root directory, as your results clearly shows.
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  7. #7
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    Quote Originally Posted by Elysia View Post
    GetDiskFreeSpace works on drives, not directories.
    So it must be a root directory, as your results clearly shows.
    Hi Elysia,
    GetDiskFreeSpace works fine on directories too with Windows 2003 and above.
    It is giving me the correct output on the same path mentioned earlier.

    here is the output -
    ----------------------------
    C:\Documents and Settings\Dnyaneshwar_Pawar\My Documents\Visual Studio Projects\
    GetDiskFreeSpace\Debug>GetDiskFreeSpace.exe \\?\UNC\netapp2704\aniket\tempQtree\
    GetDiskFreeSpace Success
    SectorsPerCluster = 8
    BytesPerSector = 733106
    TotalClusters = 12582912
    ----------------------------

    Thanks!

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    Red face

    anybody??

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