>> agssom.exe -x *all*
import os os.system(r"X:\ArcGIS\Tools\Stop_All_ArcServer_Services.bat")
X:\ArcGIS\Tools\AGSSOM\AGSSOM.exe [ServerName] -x *all*
Thinking a little further (and I haven't tried this) - you might be able to do an advanced field calculation and within that have the python calls to restart the services via the agssom. Not sure if that would work, but it would be an interesting idea. (maybe I'm just over complicating it now).
Hope this helps some
I inserted this in my Modelbuilder via Calculated Value and it worked. Now to pull the whole thing together...
How exactly did you get this to work using the Calculate Value tool???