客戶一臺F5 3400報風扇報警，b platform提供的信息如下：
[root@bb-f5standby:Standby] config # b platform
PLATFORM INFORMATION --
| Marketing Name: C100
| BIOS Rev: AMIBIOS(C)2002 American Megatrends, Inc. BIOS Date: 02/21/05 15:21:14 Ver: 08.00.06 OBJ-0075-01 REV A.
| base MAC: 00:01:D7:75:2C:00
| PVA Version: 2
+-> SYSTEM INFO
| Type: C100
| Chassis serial: bip256870s Level 200 part: 200-0281-01 REV C
| Switch board serial: PCA0124M0646 part: PCA-0124-01 REV D
| Host board serial: TY8BU09A0552 part: MOB-0013-03 REV A
| Annunciator board serial: 0751CF098122 part: OEM-0029-06 REV B
| Memory: 2.047GB
+-> HARDWARE CARDS
| | Type: compress Model: Cavium NITROX
| | version: CN1000-MC-Main-SSL-0.99a
+-> CPU 0
| | Type: Intel(R) Pentium(R) 4 CPU 2.80GHz Speed: 2799.309MHz
| | Temp: 37degC Fan speed: 10546rpm
+-> CHASSIS TEMPERATURE
| | (101) 31degC (102) 34degC (1) 46degC
+-> CHASSIS FAN
| | (101) active (102) active (103) active (104) active
| | (105) active (106) active
////可以看到機箱風扇組有6個風扇。
+-> POWER SUPPLY
| | (101) active
+-> LICENSE ADD LTM MODULE add ons
| | ADD 5 MBPS COMPRESSION
| | ADD SSL 100
[root@bb-f5standby:Active] config #
爲了找出是哪個風扇錯誤，找了臺測試機，測試風扇的次序
F5機箱裏面風扇的分佈，分CPU FAN和CHASSIS FAN
拔第1個風扇的電源線
+-> CHASSIS FAN
| | (101) active (102) DOWN! (103) active (104) active
| | (105) active (106) active
拔第2個
+-> CHASSIS FAN
| | (101) active (102) active (103) active (104) active
| | (105) active (106) DOWN!
拔第3個
+-> CHASSIS FAN
| | (101) active (102) active (103) DOWN! (104) active
| | (105) active (106) active
拔第4個
+-> CHASSIS FAN
| | (101) active (102) active (103) active (104) active
| | (105) DOWN! (106) active
拔第5個
背後2個風扇的電源線在這裏，難找點。
+-> CHASSIS FAN
| | (101) active (102) active (103) active (104) DOWN!
| | (105) active (106) active
拔第6個
+-> CHASSIS FAN
| | (101) DOWN! (102) active (103) active (104) active
| | (105) active (106) active
B plateform中CHASSIS FAN編號對應如下圖：
因此判斷用戶f5的側邊第一個風扇有問題。