Monitoring the Cooling Fans in a Junos Space Appliance
Purpose
For optimal cooling of the Junos Space appliance, verify the condition of the fans.
Action
Monitor the status of the fans. The cooling fans work in unison to cool the appliance components. An alarm is triggered when a fan fails and the Hardware Fault LED on the appliance front panel starts blinking. When one fan fails, the remaining fan begins to run at full speed.
To monitor the fans, do the following:
Log in to the appliance as the admin user.
The Junos Space Settings Menu appears.
Type
6, which is the(Debug) run shelloption.You are prompted to enter your password.
Type the password for the admin user and press Enter.
You are taken to the shell.
To view the status of the cooling fans, execute the following command:
[root@host ~]# sensors
Note:The Junos Space installer automatically sets up the Linux-monitoring sensors (lm_sensors) and configures lm_sensors to run at startup.
Sample Output
command-name
nct6776-isa-0a30 Adapter: ISA adapter Vcore: +0.66 V (min = +0.00 V, max = +1.74 V) in1: +1.51 V (min = +0.00 V, max = +0.00 V) ALARM AVCC: +3.41 V (min = +2.98 V, max = +3.63 V) VCC: +3.39 V (min = +2.98 V, max = +3.63 V) in4: +1.13 V (min = +0.00 V, max = +0.00 V) ALARM in5: +1.01 V (min = +0.00 V, max = +0.00 V) ALARM 3VSB: +3.42 V (min = +2.98 V, max = +3.63 V) Vbat: +3.38 V (min = +2.70 V, max = +3.30 V) ALARM fan1: 0 RPM (min = 0 RPM) ALARM fan2: 0 RPM (min = 0 RPM) ALARM SYSTIN: +27.0°C (high = +0.0°C, hyst = +0.0°C) ALARM sensor = thermistor CPUTIN: +97.5°C (high = +80.0°C, hyst = +75.0°C) ALARM sensor = diode AUXTIN: +25.5°C (high = +80.0°C, hyst = +75.0°C) sensor = thermistor cpu0_vid: +2.050 V w83793-i2c-0-2f Adapter: SMBus I801 adapter at f040 VcoreA: +0.22 V (min = +0.60 V, max = +1.21 V) ALARM VcoreB: +0.65 V (min = +0.60 V, max = +1.21 V) in2: +1.05 V (min = +0.99 V, max = +1.33 V) in3: +1.49 V (min = +0.40 V, max = +0.67 V) ALARM in4: +0.53 V (min = +1.34 V, max = +1.65 V) ALARM in5: +1.04 V (min = +2.96 V, max = +3.63 V) ALARM in6: +0.23 V (min = +0.90 V, max = +1.10 V) ALARM +5V: +5.07 V (min = +4.52 V, max = +5.50 V) 5VSB: +5.07 V (min = +4.52 V, max = +5.50 V) Vbat: +0.00 V (min = +2.70 V, max = +3.30 V) fan1: 0 RPM (min = 329 RPM) ALARM fan2: 0 RPM (min = 329 RPM) ALARM fan3: 3206 RPM (min = 329 RPM) fan4: 3461 RPM (min = 329 RPM) fan5: 0 RPM (min = 329 RPM) ALARM fan6: 0 RPM (min = 329 RPM) ALARM fan7: 0 RPM (min = 329 RPM) ALARM fan8: 0 RPM (min = 329 RPM) ALARM fan9: 0 RPM (min = 329 RPM) ALARM fan11: 0 RPM (min = 329 RPM) ALARM fan12: 0 RPM (min = 329 RPM) ALARM temp1: +33.0°C (high = +70.0°C, hyst = +65.0°C) sensor = Intel PECI temp2: -128.0°C (high = +60.0°C, hyst = +55.0°C) sensor = Intel PECI temp3: -128.0°C (high = +60.0°C, hyst = +55.0°C) sensor = Intel PECI temp4: -128.0°C (high = +60.0°C, hyst = +55.0°C) sensor = Intel PECI temp5: +37.0°C (high = +70.0°C, hyst = +65.0°C) sensor = thermistor temp6: +34.0°C (high = +70.0°C, hyst = +65.0°C) sensor = thermistor beep_enable:disabled
Meaning
The output of the sensors command provides
information about the fan speeds and whether an alarm has been triggered.
In the output, fans 3 and 4 represent the two rear chassis fans. The
speed of the fans (in revolutions per minute [RPM]) and an indication
of an alarm, if any, are displayed.