I have two hdd one 1tb and second 2tb and one 250 gb ssd ,I connected all to provided sata slots in order 1,2,4 where 0th slot is connected to my cd rom and 3rd is connected to my front usb hub, now I when I change my 2tb hdd sata connection to different slot or my ssd sata connection to different slot ,it doesn't connect and computer doesn't boot up. Please anyone tell me why this is happening and what should I do ,so that I can change the slot and use it in normal manner and I do not want to format any drives. Please suggest.