Drive surfaces (or "solid face") is the actual surface or "solid face" you want to cut. Sometimes during cutting of those surfaces or faces, the tool will cut beyond those drive surfaces and cut into a surrounding surface or solid face.
The surface or solid face you don't want to cut is called the check surface. if your tool is destroying the part by cutting into those surrounding check surfaces, then you need to go to your parameters and select those surfaces you don't want cut as check surfaces. Regenerate your tool path, verify and see if it's what you want.