Alerts are generated as the fans RPMs are read as 0 when the regular hardware monitoring script pulls the data (outcome is that the fans are shown in failed state)

Article:TECH209323  |  Created: 2013-08-02  |  Updated: 2014-01-17  |  Article URL
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Technical Solution



Alerts are generated as the fans RPMs are read as 0, and as the RPMs are reported as 0, the fans are reported in failed state. This gives the customers that there is something wrong with the fans. Please note that similar problem can also be reported against the temperature sensor



SNMP trap reports shows the following status/state for the fans:

- speed; na RPM
- State: warning
- Speed: -
- Status: no reading
- State: failure

The entire SNMP report can be seen in the attachment section.

Contents of the alerts would look like the following



NetBackup 5000, 5020 and 5220 appliances.


A. There is some limitation in the firmware of HuaSy appliances (5000/5020), that ipmitool may return 'na' for current speed of FAN, and that’s when we get the SNMP error as we don’t get any RPM count for the fans (instead we get NA)

B. When the hardware probing data is collected by the monitoring script, the data might not be available. This will lead to reporting the data as 0.


'hwmon' command and DataCollect data will show that all fans are OK:

support> hwmon show all

Fan Information
|ID| Status | Speed |LowWaterMark|HighWaterMark|State|
|1 |Device Present|5076.000 RPM|1974.000 RPM|11468.000 RPM|OK |
|2 |Device Present|5076.000 RPM|1974.000 RPM|11468.000 RPM|OK |
|3 |Device Present|5123.000 RPM|1974.000 RPM|11468.000 RPM|OK |
|4 |Device Present|5029.000 RPM|1974.000 RPM|11468.000 RPM|OK |

FAN1_STATUS      | 1Eh | ok  | 160.96 | Device Present
FAN2_STATUS      | 1Fh | ok  | 160.96 | Device Present
FAN3_STATUS      | 20h | ok  | 160.96 | Device Present
FAN4_STATUS      | 21h | ok  | 160.96 | Device Present

So, these are reporting errors.


SNMP errors
SNMP Errors.jpg (46 kBytes)

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