获取物理磁盘物理索引号

int GetPhysicalDriveIndex(char cLable)

{

char szDriverName[64] = "\\\\.\\C:\0";

szDriverName[4] = cLable;

int PhysicalDriveNum = -1;

HANDLE hDev = CreateFile(szDriverName,

0,

FILE_SHARE_READ|FILE_SHARE_WRITE,

NULL,

OPEN_EXISTING,

0,

NULL);

if (hDev == INVALID_HANDLE_VALUE)

{

return PhysicalDriveNum;

}

STORAGE_DEVICE_NUMBER sdn;

DWORD dwBytesRetuned=0;

long res = DeviceIoControl(hDev,

IOCTL_STORAGE_GET_DEVICE_NUMBER,

NULL,

0,

&sdn,sizeof(sdn),

&dwBytesRetuned,

NULL);

if(res)

{

PhysicalDriveNum = (int)sdn.DeviceNumber;

}

CloseHandle(hDev);

return PhysicalDriveNum;

}