The calulator says if you start off witn one 2TB disk you only get aprox 1TB available space. Is it so? How can half of one single disk be used for safety when there is no other disk to spread the data on?
I was hoping it would be like RAID 0 with only one disk and if I pop in another I wont get any more space - just safety. When I pop in the third, available data will grow.