Attached is a pdf diagram showing I've stacked together 4 x Catalyst 3750 switches. It's working fine at the moment but if the power to one rail is lost, the complete stack is broken. Hence I thought of moving the power connection in the 'New Setup' to make it better. This kind of taking care of the power rail issue but even in the new setup, it is still possible to break the stack should two of the switches fail at the same time (eg switch1 and 3 or switch2 and 4). I just wanted to know whether my stack cables are in the most effective position and there's little I can do if the switches fail at the same time (as mentioned). I've already taken into consideration of using RPS.
Thanks in advance for your help.