如何枚举NVMe（M2）驱动器的温度，以c＃为单位？
无法通过WMI常规查询访问它。
可以在c中使用此MSFT参考来执行此操作，但它相当晦涩，代码不完整：
https://docs.microsoft.com/en-us/windows/desktop/fileio/working-with-nvme-devices#temperature-queries
最佳答案
一种快速的实现（但不是最简单的实现）是使用nvme.h winioctl.h ntddstor.h API，并在c＃中与之互操作。这是一个完整的实现。
申报方：
#include <nvme.h>
#include <winioctl.h>
#include <ntddstor.h>
#ifndef Pinvoke
#define Pinvoke extern "C" __declspec(dllexport)
#endif
typedef void(__stdcall *MessageChangedCallback)(const wchar_t* string);
class __declspec(dllexport) NVmeQuery final
{
public:
NVmeQuery(MessageChangedCallback managedDelegate);
~NVmeQuery();
template <class ... T>
auto LogMessage(T&& ... args) -> void;
auto GetTemp(const wchar_t* nvmePath) -> unsigned long;
MessageChangedCallback LogMessageChangedCallback{};
PNVME_HEALTH_INFO_LOG SmartHealthInfo{};
PSTORAGE_PROPERTY_QUERY query{};
PSTORAGE_PROTOCOL_SPECIFIC_DATA protocolSpecificData{};
PSTORAGE_PROTOCOL_DATA_DESCRIPTOR protocolDataDescriptor{};
};
定义面：
我用来将错误消息回传到托管端的功能；对于了解哪里出了问题，如何/在何处至关重要：
template<class ...T>
auto NVmeQuery::LogMessage(T&&... args) -> void
{
wchar_t updatedMessage[256];
swprintf_s(updatedMessage, forward<T>(args)...);
if (LogMessageChangedCallback != nullptr)
LogMessageChangedCallback(updatedMessage);
}
核心功能不容易设计。它分为四个部分：
1.处理NVMe驱动器
2.准备查询
3.做查询
4.检查并传输结果
auto NVmeQuery::GetTemp(const wchar_t* nvmePath) -> unsigned long
{
auto nvmeHandle = CreateFile(nvmePath, 0, 0,
0, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0);
{
auto lastErrorID = GetLastError();
if (lastErrorID != 0)
{
LPVOID errorBuffer{};
FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS,
nullptr, lastErrorID, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), (LPTSTR)&errorBuffer, 0, nullptr);
LogMessage(L"Query: ERROR creating handle to NVMe [%s]: %d, %s", nvmePath, lastErrorID, errorBuffer);
}
}
unsigned long bufferLength = FIELD_OFFSET(STORAGE_PROPERTY_QUERY, AdditionalParameters)
+ sizeof(STORAGE_PROTOCOL_SPECIFIC_DATA) + NVME_MAX_LOG_SIZE;
void *buffer = malloc(bufferLength);
ZeroMemory(buffer, bufferLength);
query = (PSTORAGE_PROPERTY_QUERY)buffer;
protocolDataDescriptor = (PSTORAGE_PROTOCOL_DATA_DESCRIPTOR)buffer;
protocolSpecificData = (PSTORAGE_PROTOCOL_SPECIFIC_DATA)query->AdditionalParameters;
query->PropertyId = StorageDeviceProtocolSpecificProperty;
query->QueryType = PropertyStandardQuery;
protocolSpecificData->ProtocolType = ProtocolTypeNvme;
protocolSpecificData->DataType = NVMeDataTypeLogPage;
protocolSpecificData->ProtocolDataRequestValue = NVME_LOG_PAGE_HEALTH_INFO;
protocolSpecificData->ProtocolDataRequestSubValue = 0;
protocolSpecificData->ProtocolDataOffset = sizeof(STORAGE_PROTOCOL_SPECIFIC_DATA);
protocolSpecificData->ProtocolDataLength = sizeof(NVME_HEALTH_INFO_LOG);
unsigned long returnedLength{};
继续，实际查询，然后进行其他检查：
auto result = DeviceIoControl(nvmeHandle, IOCTL_STORAGE_QUERY_PROPERTY,
buffer, bufferLength,
buffer, bufferLength,
&returnedLength, nullptr);
if (!result || returnedLength == 0)
{
auto lastErrorID = GetLastError();
LPVOID errorBuffer{};
FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS,
nullptr, lastErrorID, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), (LPTSTR)&errorBuffer, 0, nullptr);
LogMessage(L"Query: drive path: %s, nvmeHandle %lu", nvmePath, nvmeHandle);
LogMessage(L"Query: ERROR DeviceIoControl 0x%x %s", lastErrorID, errorBuffer);
}
if (protocolDataDescriptor->Version != sizeof(STORAGE_PROTOCOL_DATA_DESCRIPTOR) ||
protocolDataDescriptor->Size != sizeof(STORAGE_PROTOCOL_DATA_DESCRIPTOR))
{
LogMessage(L"Query: Data descriptor header not valid (size of descriptor: %llu)", sizeof(STORAGE_PROTOCOL_DATA_DESCRIPTOR));
LogMessage(L"Query: DataDesc: version %lu, size %lu", protocolDataDescriptor->Version, protocolDataDescriptor->Size);
}
protocolSpecificData = &protocolDataDescriptor->ProtocolSpecificData;
if (protocolSpecificData->ProtocolDataOffset < sizeof(STORAGE_PROTOCOL_SPECIFIC_DATA) ||
protocolSpecificData->ProtocolDataLength < sizeof(NVME_HEALTH_INFO_LOG))
LogMessage(L"Query: ProtocolData Offset/Length not valid");
SmartHealthInfo = (PNVME_HEALTH_INFO_LOG)((PCHAR)protocolSpecificData + protocolSpecificData->ProtocolDataOffset);
CloseHandle(nvmeHandle);
auto temp = ((ULONG)SmartHealthInfo->Temperature[1] << 8 | SmartHealthInfo->Temperature[0]) - 273;
return temp;
} // end of GetTemp
对于互操作性：
Pinvoke auto __stdcall New(MessageChangedCallback managedDelegate) -> NVmeQuery*
{
return new NVmeQuery(managedDelegate);
}
Pinvoke auto GetTemp(NVmeQuery* p, const wchar_t* nvmePath) -> unsigned long
{
return p->GetTemp(nvmePath);
}
和C＃方面：
public static class NVMeQuery
{
[DllImport("NVMeQuery.dll", CallingConvention = CallingConvention.StdCall)]
internal static extern IntPtr New(InteropBase.AssetCallback callback);
[DllImport("NVMeQuery.dll", CallingConvention = CallingConvention.Cdecl)]
internal static extern ulong GetTemp(IntPtr p, IntPtr drivePath);
}
public class NVMeQueries : InteropBase
{
public NVMeQueries()
{
_ptr = NVMeQuery.New(_onAssetErrorMessageChanged);
}
public ulong GetTemp() => GetTemp(@"\\.\PhysicalDrive4");
public ulong GetTemp(string drivePath)
{
var strPtr = Marshal.StringToHGlobalAuto(drivePath);
var result = NVMeQuery.GetTemp(_ptr, strPtr);
Marshal.FreeHGlobal(strPtr);
return result;
}
}
和我用于互操作的通用基类：
public class InteropBase : INotifyPropertyChanged
{
protected IntPtr _ptr;
protected readonly AssetCallback _onAssetErrorMessageChanged;
public delegate void AssetCallback(IntPtr strPtr);
public List<string> LogMessages { get; private set; } = new List<string>();
public InteropBase()
{
_onAssetErrorMessageChanged = LogUpdater;
}
private unsafe void LogUpdater(IntPtr strPtr)
{
var LastLogMessage = new string((char*)strPtr);
LogMessages.Add(LastLogMessage);
OnPropertyChanged(nameof(LogMessages));
}
public event PropertyChangedEventHandler PropertyChanged;
[NotifyPropertyChangedInvocator]
protected virtual void OnPropertyChanged([CallerMemberName] string propertyName = null)
{
PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
}
}
就我而言，我要查询的NVMe驱动器是第4个物理驱动器。我们通过以下方式获得所有这些：
Get-WmiObject Win32_DiskDrive
在我的情况下：
Partitions : 4
DeviceID : \\.\PHYSICALDRIVE4
Model : Samsung SSD 970 EVO Plus 1TB
Size : 1000202273280
Caption : Samsung SSD 970 EVO Plus 1TB
备注
这种实现非常快（没有LogMessage调用时，不到1ms）。您可以定义并填充自己的结构，以获得其他相关信息；在这种情况下，该结构必须保存在本机类的字段中（例如，在本示例中为
SmartHealthInfo），并且查询将仅发送指向该结构的指针。关于c# - 如何枚举NVMe(M2)驱动器的温度，以C#为单位？，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/55132739/