Why I get ERROR_INVALID_FUNCTION ( winapi error 1 ), when I execute GetFileSizeEx?-CodePudding

I would like to get file size of my external hard disk.

handle = CreateFile(L"\\\\.\\PhysicalDrive5", GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL , NULL);

if (handle == INVALID_HANDLE_VALUE) {
   std::cout<<"ERROR!"<<std::endl;
   return -1;
}

LARGE_INTEGER size;
if(!GetFileSizeEx(handle, &size))
{
    auto lastError = GetLastError();
    std::cout<<"Last Error: "<<lastError<<std::endl;
    CloseHandle(handle);
    return -1;
}

When I execute my application with admin rights ( it is necessary for CreateFile ), I get Last Error: 1.

OS: Windows 10, Compiler: MinGW 7.3.0

CodePudding user response：

Afaik wrong function for the object "physical disk".

User DeviceIoControl with IOCTL_DISK_GET_DRIVE_GEOMETRY.