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?

The error message seems pretty self-explanatory to me.

What are you passing as the first parameter?

Your should really use GetDiskFreeSpaceEx anyway.

Quote:

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Originally Posted by iMalc

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 ?

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.

GetDiskFreeSpace works on drives, not directories.
So it must be a root directory, as your results clearly shows.

Quote:

---

Originally Posted by Elysia

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!

anybody??