S-Series f/w 7.03.03.0001 displays alternating Environmental Temperature Hot / Normal messages

[FAQ_User]

Article ID: 13226

Products
S-Series, firmware 7.01.03.0004 through 7.03.06.0004

Symptoms
The system logs "

code:

hot

" messages, then "

code:

normal

" messages a short time later.

Here is the syslog output ('

code:

show logging buffer

') - in ascending sequence - from an affected system:<163>Jun 15 10:41:14 10.21.31.2 System[3]Environmental temperature is hot.
<163>Jun 15 10:41:24 10.21.31.2 System[3]Environmental temperature is normal.
<163>Jun 19 07:51:18 10.21.31.2 System[3]Environmental temperature is hot.
<163>Jun 19 07:51:28 10.21.31.2 System[3]Environmental temperature is normal.
<163>Jun 22 17:41:20 10.21.31.2 System[3]Environmental temperature is hot.
<163>Jun 22 17:41:30 10.21.31.2 System[3]Environmental temperature is normal.
<163>Jun 25 00:22:40 10.21.31.2 System[3]Environmental temperature is hot.
<163>Jun 25 00:22:50 10.21.31.2 System[3]Environmental temperature is normal.
<163>Jun 25 08:51:13 10.21.31.2 System[3]Environmental temperature is hot.
<163>Jun 25 08:51:23 10.21.31.2 System[3]Environmental temperature is normal.
<163>Jun 28 20:40:14 10.21.31.2 System[3]Environmental temperature is hot.
<163>Jun 28 20:40:24 10.21.31.2 System[3]Environmental temperature is normal.
<163>Jun 29 13:32:37 10.21.31.2 System[3]Environmental temperature is hot.
<163>Jun 29 13:32:47 10.21.31.2 System[3]Environmental temperature is normal.
Here is the fault log output ('

code:

show support

') - in descending sequence - from the same system:==============================================================================
Message 1/43 Syslog Message 07.03.03.0001 06/29/2010 13:32:47
<3>System[3]Environmental temperature is normal.

==============================================================================
Message 2/43 Syslog Message 07.03.03.0001 06/29/2010 13:32:37
<3>System[3]Environmental temperature is hot.

==============================================================================
Message 3/43 Syslog Message 07.03.03.0001 06/28/2010 20:40:24
<3>System[3]Environmental temperature is normal.

==============================================================================
Message 4/43 Syslog Message 07.03.03.0001 06/28/2010 20:40:14
<3>System[3]Environmental temperature is hot.

==============================================================================
Message 5/43 Syslog Message 07.03.03.0001 06/25/2010 08:51:23
<3>System[3]Environmental temperature is normal.

==============================================================================
Message 6/43 Syslog Message 07.03.03.0001 06/25/2010 08:51:13
<3>System[3]Environmental temperature is hot.

==============================================================================
Message 7/43 Syslog Message 07.03.03.0001 06/25/2010 00:22:50
<3>System[3]Environmental temperature is normal.

==============================================================================
Message 8/43 Syslog Message 07.03.03.0001 06/25/2010 00:22:40
<3>System[3]Environmental temperature is hot.

==============================================================================
Message 9/43 Syslog Message 07.03.03.0001 06/22/2010 17:41:30
<3>System[3]Environmental temperature is normal.

==============================================================================
Message 10/43 Syslog Message 07.03.03.0001 06/22/2010 17:41:20
<3>System[3]Environmental temperature is hot.

==============================================================================
Message 11/43 Syslog Message 07.03.03.0001 06/19/2010 07:51:28
<3>System[3]Environmental temperature is normal.

==============================================================================
Message 12/43 Syslog Message 07.03.03.0001 06/19/2010 07:51:18
<3>System[3]Environmental temperature is hot.

==============================================================================
Message 13/43 Syslog Message 07.03.03.0001 06/15/2010 10:41:24
<3>System[3]Environmental temperature is normal.

==============================================================================
Message 14/43 Syslog Message 07.03.03.0001 06/15/2010 10:41:14
<3>System[3]Environmental temperature is hot.

==============================================================================
Cause
These are false positive readings, when no actual over-temp condition exists.

Solution/Workaround
Upgrade to firmware 7.11.01.0026 or higher.
Release notes state, in the '

code:

Firmware Changes and Enhancements

' section:

code:

Management

code:

Incorrect data read from the temperature sensor device may produce intermittent warning messages regarding environmental temperatures. Inaccurate warning messages similar to "

<

code:

3

>

code:

System[3]Environmental temperature is hot." may occur followed 10 seconds later by a messages similar to "

<

code:

3

>

code:

System[3]Environmental temperature is normal."

Pre-upgrade workaround:
Such rapidly-correcting "

code:

hot

" messages may be safely ignored.
Messages that do not appear to be self-correcting should be investigated further, by using the '

code:

show system hardware

' command to view the underlying board temperature readings (13189).
Contact the GTAC for assistance, as necessary.