Ok I haven't actually got my raspberry yet but what I want to do is use one as a 'media player' type device, i.e run XBMC (or something similar) off it, AND use it as part of a NAS with two HDD's connected via USB to it and implement some sort of RAID-like functions.
I'm not sure if I can do this with one Raspberry or will I need two? I know I could run one with XBMC and HDD connected but I dunno if this will do the NAS and RAID-like functions too?
My confusion is about the nature of XBMC (or say Xbian). Is this basically an operating system in itself, or does it run as an app on Raspbian? I think I need both on the same machine to do what I want to do?
Thanks...sorry for the newbness.