how to identify the drive type?

[VCProgrammer]

hi all, i am getting all drives list connected in my system. as list of logical drive and physical drive. for logical drives i m using GetLogicalDrives() and for physical drives using com with this query "Win32_DiskDrive". but how can i indetify which drive is external drive in out of all drive for both logical and physical. please help me for this. thank in advance.

[Lost User]

You could always check the documentation[^].

One of these days I'm going to think of a really clever signature.

[VCProgrammer]

this is working only for physical disk drive i have done this with MediaType parameter with "External hard disk media" value. now what can i use for logical drives.

[Lost User]

Since a physical drive can contain many logical drives it probably does not make sense for logical. You probably need to find the logical drive's parent device and check that.

One of these days I'm going to think of a really clever signature.

[VCProgrammer]

ok so how can i get its parent disk

[Lost User]

Sorry, I'm not sure, but maybe one of these functions[^] will help.

One of these days I'm going to think of a really clever signature.

[VCProgrammer]

thanks for you help its done...

[Lost User]

Maybe you could give the details here, so it will be available for others facing similar issues.

One of these days I'm going to think of a really clever signature.

[VCProgrammer]

using this to get hard disk num of selected drive

CString drive_is;//logical drive letter
int ret_disk_num=-1;//disk numer of passed logical drive

drive\_is.Remove('\\\\');
drive\_is.Trim();

CString szDrive=\_T("\\\\\\\\.\\\\");
szDrive+= drive\_is;

	
int rt;

HANDLE h = CreateFile(szDrive, GENERIC\_READ, FILE\_SHARE\_READ|FILE\_SHARE\_WRITE,NULL,OPEN\_EXISTING,/\*0\*/FILE\_ATTRIBUTE\_NORMAL | FILE\_FLAG\_OVERLAPPED,NULL);
if(INVALID\_HANDLE\_VALUE != h)
{
	VOLUME\_DISK\_EXTENTS vdExtents;
	ZeroMemory(&vdExtents, sizeof(vdExtents));

	DWORD d =32;
				
	DWORD dwRet;
	rt = DeviceIoControl(h, IOCTL\_VOLUME\_GET\_VOLUME\_DISK\_EXTENTS, NULL, 0, &vdExtents, d, &dwRet, NULL);
		
	CloseHandle(h);
	h=NULL;

	if(rt != 0)
	{
		//vdExtents.Extents\[0\].DiskNumber;

		for (DWORD n = 0; n < vdExtents.NumberOfDiskExtents; ++n)
		{
			PDISK\_EXTENT pDiskExtent = &vdExtents.Extents\[n\];
			
			ret\_disk\_num =pDiskExtent->DiskNumber;
			
		}
	}
	else
	{
		DWORD d;
		d = GetLastError();

	}
		 	
	if(h!=NULL)
		CloseHandle(h);
}
else
{
	

	return ret\_disk\_num;
}

return ret\_disk\_num;	 

}

after getting disk drive num chek the media type of drive using Win32_DiskDrive.