First found two 60mm diameter "220V Cooling Fan", the use of the adhesive tape and glue them together 502 each an edge. Due to the limited width of the chassis drive bay, you can not use a larger diameter fan, it uses two small fan and connected way. Note that these winds to be consistent. Because hot air is rising state, "220V Cooling Fan" is to accelerate the flow of hot air rises, so these two wind fans are from bottom to top. Then found two pencil erasers, glue them on with double-sided "220V Cooling Fan" at the bottom of the frame, and finally with double-sided adhesive paste them on the hard shell, and the "hard" Installation to the chassis drive bays can be. Eraser having a certain thickness increasing the distance between the hard disk and fan, while its elasticity and reduces the vibration of the fan.