windows的磁盘操作，如何根据逻辑分区号获得物理磁盘号

桃扇骨 2023-05-29 05:09 9阅读 0赞

对于物理驱动器x，形式为 \\.\\PhysicalDriveX，编号从0开始，例如

<table> 
 <thead> 
  <tr> 
   <th>名称</th> 
   <th>含义</th> 
  </tr> 
 </thead> 
 <tbody> 
  <tr> 
   <td>\.\PhysicalDrive0</td> 
   <td>打开第一个物理驱动器</td> 
  </tr> 
  <tr> 
   <td>\.\PhysicalDrive1</td> 
   <td>打开第二个物理驱动器</td> 
  </tr> 
 </tbody> 
</table>

分区（卷），形式为 \\.\\X: ，例如

<table> 
 <thead> 
  <tr> 
   <th>名称</th> 
   <th>含义</th> 
  </tr> 
 </thead> 
 <tbody> 
  <tr> 
   <td>\.\A:</td> 
   <td>打开A盘（软驱）</td> 
  </tr> 
  <tr> 
   <td>\.\D:</td> 
   <td>打开D盘（磁盘逻辑分区）</td> 
  </tr> 
 </tbody> 
</table>

Tips:  
打开逻辑磁盘的时候，`\` 注意要转义，并且与物理驱动相比多了个冒号`:`,  
如下所示：

//硬盘文件名
       LPCSTR DiskFileName="\\\\.\\PhysicalDrive2";
       handle = CreateFile(QString("\\\\.\\PhysicalDrive2").toStdWString().data(), GENERIC_READ|GENERIC_WRITE, FILE_SHARE_READ | FILE_SHARE_WRITE,NULL, OPEN_EXISTING, 0, NULL);
       handle = CreateFile(QString("\\\\.\\H:").toStdWString().data(), GENERIC_READ|GENERIC_WRITE, FILE_SHARE_READ | FILE_SHARE_WRITE,NULL, OPEN_EXISTING, 0, NULL);

参考自：  
[https://blog.csdn.net/weixin\_34343308/article/details/91754123][https_blog.csdn.net_weixin_34343308_article_details_91754123]

[https://www.cnblogs.com/chaikefusibushiji/p/7475616.html][https_www.cnblogs.com_chaikefusibushiji_p_7475616.html]

--------------------

## 根据逻辑分区号获得物理磁盘号，代码示例： ##

#include <stdio.h>
    #include <Windows.h>
    #define DISK_PATH_LEN 128
    /****************************************************************************** * Function: get disk's physical number from its drive letter * e.g. C-->0 (C: is on disk0) * input: letter, drive letter * output: N/A * return: Succeed, disk number * Fail, -1 ******************************************************************************/
    DWORD GetPhysicalDriveFromPartitionLetter(char letter)
    { 
        HANDLE hDevice;               // handle to the drive to be examined
        BOOL result;                 // results flag
        DWORD readed;                   // discard results
        STORAGE_DEVICE_NUMBER number;   //use this to get disk numbers
     
        CHAR path[DISK_PATH_LEN];
        sprintf(path, "\\\\.\\%c:", letter);
        hDevice = CreateFile(path, // drive to open
                             GENERIC_READ | GENERIC_WRITE,    // access to the drive
                             FILE_SHARE_READ | FILE_SHARE_WRITE,    //share mode
                             NULL,             // default security attributes
                             OPEN_EXISTING,    // disposition
                             0,                // file attributes
                             NULL);            // do not copy file attribute
        if (hDevice == INVALID_HANDLE_VALUE) // cannot open the drive
        { 
            fprintf(stderr, "CreateFile() Error: %ld\n", GetLastError());
            return DWORD(-1);
        }
     
        result = DeviceIoControl(
                    hDevice,                // handle to device
                    IOCTL_STORAGE_GET_DEVICE_NUMBER, // dwIoControlCode
                    NULL,                            // lpInBuffer
                    0,                               // nInBufferSize
                    &number,           // output buffer
                    sizeof(number),         // size of output buffer
                    &readed,       // number of bytes returned
                    NULL      // OVERLAPPED structure
                );
        if (!result) // fail
        { 
            fprintf(stderr, "IOCTL_STORAGE_GET_DEVICE_NUMBER Error: %ld\n", GetLastError());
            (void)CloseHandle(hDevice);
            return (DWORD)-1;
        }
        //printf("%d %d %d\n\n", number.DeviceType, number.DeviceNumber, number.PartitionNumber);
     
        (void)CloseHandle(hDevice);
        return number.DeviceNumber;
    }
    
    
    int main(int argc, char *argv[], char *envp[])
    { 
    
    	int i = 0;
    	for (i = 0; i < argc; i++)
    	{ 
    		printf("%d:%s\n", i, argv[i]);
    	}
    	//system("pause");
        char disk_name = argv[1][0];
        printf("disk_name:%c\n", disk_name);
    
        int disk_num;
        disk_num = GetPhysicalDriveFromPartitionLetter(disk_name);
        printf("disk_num:%d\n", disk_num);
    
    	return 0;
    }

--------------------

注意：要 ***管理员权限*** 运行，才能获取正常

## 结果 ##

C盘的物理磁盘号为0，  
D,E,F盘的物理磁盘号为1，  
G盘的物理磁盘号为2  
H盘，没有H盘，返回-1

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![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xpbmJvdW5jb25zdHJhaW50_size_16_color_FFFFFF_t_70 1]

[https_blog.csdn.net_weixin_34343308_article_details_91754123]: https://blog.csdn.net/weixin_34343308/article/details/91754123
[https_www.cnblogs.com_chaikefusibushiji_p_7475616.html]: https://www.cnblogs.com/chaikefusibushiji/p/7475616.html
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xpbmJvdW5jb25zdHJhaW50_size_16_color_FFFFFF_t_70]: https://img-blog.csdnimg.cn/20191104144037517.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xpbmJvdW5jb25zdHJhaW50,size_16,color_FFFFFF,t_70
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xpbmJvdW5jb25zdHJhaW50_size_16_color_FFFFFF_t_70 1]: https://img-blog.csdnimg.cn/20191104143722431.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xpbmJvdW5jb25zdHJhaW50,size_16,color_FFFFFF,t_70