Add HW Inventory class that does not exist in a default inventoried class

Question

Hello all, 
I am trying to find a way to create a new class to supersede the win32_logicaldisk class. We are looking to add the VolumeDirty flag since it does not exist in the current SMS_logicaldisk class. However I cant seem to find a good way to do this. Has anyone
done something like this before? Adding new classes doesn't seem to be difficult, but since this is a default WMI class that is being inventoried, I don't want to make any modifications to it as I know I will regret it down the road. I was thinking maybe creating
a configuration item and inventorying it that way? Thoughts? Or is this even possible? Thanks in advance! 
Scott

Answer 1

I do similar things--create a new I-Made-It-Up class to pull in something that the default doesn't.  I understand and agree with not modifying default classes--it perhaps would never be a problem--but if (perhaps maybe) some future upgrade or cumulative
update failed to install because you modified a default class, it could be a sad sad day.  :)
If you want me to just write the mof edit for you, let me know.  Otherwise for a sample of how to do that; look at the mof edits for 'making up my own' SQL inventory:
http://mnscug.org/blogs/sherry-kissinger/328-installed-sql05-sql08-sql12-sql14-version-information-via-configmgr-hardware-inventory
Essentially, you make up a configuration.mof edit; making a 'copy of' what you really want out of win32_logicaldisk, but you dump it into a cm_scott_x_awesomeness  (or whatever you want to call it), and you put that at the bottom of configuration.mof
on your server.
Then your to-be-imported.mof into default client, hardware inventory, classes... import (if you're old skool, the sms_def.mof piece of it) will be a .mof file to inventory cm_scott_x_awesomeness
Just be careful to name what you really want to see in v_gs_NameThatView inside the quotes SMS_Group_Name and SMS_Class_ID.  You'll be living with that table and view name forever, so maybe, perhaps, calling it Scott_X_Awesomeness just might not be
the best name ever (although it sounds great right now, at review time w/the boss maybe not so much).
Standardize. Simplify. Automate.