Does anyone know about raid migration? I've just got my new Promise NS4600 and 1 WD20EVDS 2TB drive in one bay(obviously RAID 1). I've put some media files on it and it works fine. I intend to put 3 more 2TB drives in it and have it running as RAID 5. Just want to check that what will happen is the machine will recognise that there are now 4 drives, offer me the choice of RAID (0,1,5 or 10) and set up the configuration I choose without me losing the files I have on the drive that was in originally.