So if this helps just one person its worth a post,
yesterday windows had an optional update (win 7 64) available which is a "Promise ACHI raid controller driver" .....hmm no idea what this is but foolishly I installed it, upon re start my ICH10R raid array was missing............oh dear !
luckily restore got me up and running but for some if the bootdrive is on the intel controller it could be messy, fortunately my boot drive at this time is back on the marvell.