That’s all there is to it. My conjecture is that excluding the system disk from server storage will help lower the overall space required by the system disk which is currently 160GB.
I’m testing to figure out if this would allow one to install WHS V2 on a smaller hard drive such as a SSD. While neither necessary, nor cost effective, it may free up another 3.5″ bay in WHS systems if a smaller SSD could be used and mounted elsewhere within an enclosure.
Another thing I am looking at is whether the smaller drive can be 80GB (Intel X25-M size) or if it needs to be 100GB (OCZ Agility 2 100GB sized)/ 120GB (OCZ Vertex 120GB sized). From the looks of it, a default installation takes over 80GB. The initial results look bad (see below) but I think this is easy to get around.