如何查询Windows C环境下物理磁盘缓存、机械转速、逻辑磁盘Inode可用及使用率？

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为了获取物理磁盘的缓存大小，您可以使用Windows API函数`GetSystemFileCacheSize()`和`GetSystemFileCacheSizeEx()`。以下是一个示例代码：

c#include

int main() { ULONGLONG cacheSize; if (GetSystemFileCacheSize(&cacheSize)==ERROR_SUCCESS) { printf(物理磁盘缓存大小: %llu 字节\n, cacheSize); } else { printf(获取物理磁盘缓存大小失败。\n); }

ULONGLONG extendedCacheSize; if (GetSystemFileCacheSizeEx(&extendedCacheSize)==ERROR_SUCCESS) { printf(扩展物理磁盘缓存大小: %llu 字节\n, extendedCacheSize); } else { printf(获取扩展物理磁盘缓存大小失败。\n); }

return 0;}

要获取物理磁盘的缓存，您可以使用Windows API函数GetSystemFileCacheSize()和GetSystemFileCacheSizeEx()。以下是一个示例代码：

#include <iostream> #include <windows.h> int main() { DWORD cacheSize; DWORD cacheSizePeak; if (GetSystemFileCacheSize(&cacheSize, &cacheSizePeak, NULL)) { std::cout << "Physical disk cache size: " << cacheSize << " bytes\n"; } else { std::cout << "Failed to get physical disk cache size\n"; } return 0; }

要获取机械磁盘的转速，您可以使用Windows WMI（Windows管理信息） API。以下是一个示例代码：

#include <iostream> #include <comdef.h> #include <Wbemidl.h> #pragma comment(lib, "wbemuuid.lib") int main() { HRESULT hres; // Initialize COM hres = CoInitializeEx(0, COINIT_MULTITHREADED); if (FAILED(hres)) { std::cout << "Failed to initialize COM library\n"; return 1; } // Connect to WMI namespace IWbemLocator* pLoc = NULL; hres = CoCreateInstance(CLSID_WbemLocator, 0, CLSCTX_INPROC_SERVER, IID_IWbemLocator, (LPVOID*)&pLoc); if (FAILED(hres)) { std::cout << "Failed to create IWbemLocator object\n"; CoUninitialize(); return 1; } IWbemServices* pSvc = NULL; hres = pLoc->ConnectServer(_bstr_t(L"ROOT\\CIMV2"), NULL, NULL, 0, NULL, 0, 0, &pSvc); if (FAILED(hres)) { std::cout << "Failed to connect to IWbemServices\n"; pLoc->Release(); CoUninitialize(); return 1; } // Set security level on proxy hres = CoSetProxyBlanket(pSvc, RPC_C_AUTHN_WINNT, RPC_C_AUTHZ_NONE, NULL, RPC_C_AUTHN_LEVEL_CALL, RPC_C_IMP_LEVEL_IMPERSONATE, NULL, EOAC_NONE); if (FAILED(hres)) { std::cout << "Failed to set security level on IWbemServices proxy\n"; pSvc->Release(); pLoc->Release(); CoUninitialize(); return 1; } // Query Win32_DiskDrive class IEnumWbemClassObject* pEnumerator = NULL; hres = pSvc->ExecQuery(_bstr_t("WQL"), _bstr_t("SELECT * FROM Win32_DiskDrive"), WBEM_FLAG_FORWARD_ONLY | WBEM_FLAG_RETURN_IMMEDIATELY, NULL, &pEnumerator); if (FAILED(hres)) { std::cout << "Failed to execute Win32_DiskDrive query\n"; pSvc->Release(); pLoc->Release(); CoUninitialize(); return 1; } // Get properties of each disk drive IWbemClassObject* pObj = NULL; ULONG uReturn = 0; while (pEnumerator) { HRESULT hr = pEnumerator->Next(WBEM_INFINITE, 1, &pObj, &uReturn); if (0 == uReturn) { break; } VARIANT var; hr = pObj->Get(L"MediaType", 0, &var, 0, 0); if (SUCCEEDED(hr) && var.vt == VT_BSTR && wcscmp(var.bstrVal, L"HDD") == 0) { hr = pObj->Get(L"RotationalSpeed", 0, &var, 0, 0); if (SUCCEEDED(hr) && var.vt == VT_I4) { std::cout << "Mechanical disk rotational speed: " << var.intVal << " RPM\n"; } else { std::cout << "Failed to get mechanical disk rotational speed\n"; } } VariantClear(&var); pObj->Release(); } // Cleanup pEnumerator->Release(); pSvc->Release(); pLoc->Release(); CoUninitialize(); return 0; }

要获取逻辑磁盘的Inode可用和Inode使用率，您可以使用Windows API函数GetDiskFreeSpaceEx()。以下是一个示例代码：

#include <iostream> #include <windows.h> int main() { ULARGE_INTEGER freeBytesAvailable; ULARGE_INTEGER totalNumberOfBytes; ULARGE_INTEGER totalNumberOfFreeBytes; if (GetDiskFreeSpaceEx(L"C:", &freeBytesAvailable, &totalNumberOfBytes, &totalNumberOfFreeBytes)) { std::cout << "Inodes available: " << freeBytesAvailable.QuadPart / 4096 << '\n'; std::cout << "Inode usage: " << (1.0 - (double)totalNumberOfFreeBytes.QuadPart / totalNumberOfBytes.QuadPart) * 100 << "%\n"; } else { std::cout << "Failed to get inode usage\n"; } return 0; }

请注意，这只是一个示例，并且在其他操作系统上可能需要不同的API来访问文件系统信息。

error C2664: “BOOL GetSystemFileCacheSize(PSIZE_T,PSIZE_T,PDWORD)”: 无法将参数 1 从“DWORD *”转换为“PSIZE_T”

该错误意味着您在调用GetSystemFileCacheSize函数时，第一个参数的类型不正确。PSIZE_T是一个指向SIZE_T类型的指针，而DWORD*是一个指向DWORD类型的指针。根据错误信息，您正在尝试将一个DWORD类型的指针转换为PSIZE_T类型的指针，这是不兼容的。

要解决此问题，请将第一个参数的类型更改为PSIZE_T类型的指针。下面是一个示例代码：

#include <iostream> #include <windows.h> int main() { SIZE_T cacheSize; SIZE_T cacheSizePeak; if (GetSystemFileCacheSize(&cacheSize, &cacheSizePeak, NULL)) { std::cout << "Physical disk cache size: " << cacheSize << " bytes\n"; } else { std::cout << "Failed to get physical disk cache size\n"; } return 0; }

请注意，如果您使用的是Visual Studio编译器，并且正在使用更高版本的SDK，则可能还需要在代码中添加以下宏定义：

#define _WIN32_WINNT 0x0601

这将指示编译器使用Windows 7或更高版本的SDK，以便您可以使用PSIZE_T类型的指针。