Check the information of the fan through the management WEB interface and check the hardware state with the power off.
1. Login the management WEB interface and check the current status of the fan from the view of “system information > system status” and make sure the serious noise is resulting from that one fan is abnormal which results in the speeding of other fans.
2. Open the server, and take the defending board. Check the hardware status of the fan locating between the mainboard and hard disk and the location of the binding post of the fan, which is marked yellow in the following figure. Enlarge the binding post and we can see that wrong wiring method in 3,4,5 has resulted in the failure.