Need advise of Power Supply for File server !


Limp Gawd
Oct 8, 2010
Hi guys.
I have a home file server which have 13 x 2TB Seagate LP hard disk and a miniITX mainboard . The PSU power this system is Cooler Master Silent Pro M 600W which is quite a good and expensive power supply. This is a picture of this PSU module :


There are 4 port for power Hard disk. But the problem is everytime i place 4 hard disk to 1 port , the hard disk just lost in window or clicking like crazay. And it only stop if i put 1 hard disk out and place only 3 hard disk per module but with it i can have only 12 hard disk for 4 module port.
This power supply is single rail so i beleive that any module port can supply a 40A line to the Hard disk. But why one module port can only place 3 hard disk ?Any one have any idea about this ? It not about the power supply, i'v tried to change 3 power supply already and i found out that all of the Cooler Master Silent Pro M 600W have this same problem.
Thanks and sorry for my bad english, hope your guys can understand what my problem is.