I'm working on a project that will create a commercial image photo library. I am planning my hardware requirements for the future and am looking into how many images i will require to be stored. At the moment i am looking at about 500gb of images to start with. My question is, if i get an xServe and max out the storage (750gb) and feel i need more than this and get an xRaid, can i create an array that will include both the 750gb from the xServe and the 1tb-3.5tb that the xRaid provides? i.e. create an array that can theoretically store 4.25tb. I haven't decided on which type of array i will create yet. Also, would i be best to get the Hardware Raid that comes with the xServe if i was going to get an xRaid, or would the xRaid manage the Raid on the xServe? Any help would be appreciated.