[UWF] [WIN10 LTSB] Not able to create a UWF_VOLUME instance

Question

Hello.

I am creating a small helper program that will apply the right UWF configurations.

A part of it is to protect the C:/ drive.

Now with a fresh install there is only one UWF_Volume instance, which is for the current session. uwfmgr.exe volume protect c: creates the instance.

The docs hint at creating the UWF_Volume instance yourself, but i was not able to do this.

I used Mgmtclassgen.exe to generate strongly typed wmi classes, and i then tried the following code:

            string CreatedWmiNamespace = "ROOT\\StandardCimv2\\embedded";
            string CreatedClassName = "UWF_Volume";

            var managementScope = new ManagementScope();
            managementScope.Path.NamespacePath = CreatedWmiNamespace;
            managementScope.Path.Server = Environment.UserDomainName;
            managementScope.Path.RelativePath = "UWF_Volume.CurrentSession=false,DriveLetter=\"C:\",VolumeName=\"Volume{61f048ac-d2e8-48b3-973d-1d14ac35c409}\"";
            var managementPath = new ManagementPath(CreatedClassName);

            var managementClass = new ManagementClass(managementScope, managementPath, null);
            
            var mgtmObject = managementClass.CreateInstance();
            
            var putoptions = new PutOptions();
            putoptions.Type = PutType.UpdateOrCreate;

            mgtmObject.Put(putoptions);

Both the strongly typed class and this give an exception:

System.Management.ManagementException was unhandled
  HResult=-2146233087
  Message=Invalid parameter 
  Source=System.Management

How can I create the UWF_Volume instance correctly?



Answer 1

Since there is multiple sessions with UWF, a foreach is needed to get the correct instance. There is a UWF C# source code example that comes with my book: http://www.annabooks.com/Book_SGWin10IoTE.html. Please look at the downloads. 

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Sean Liming - Book Author: Starter Guide Windows 10 IoT Enterprise - www.annabooks.com / www.seanliming.com