All fans are reported faulty in a Sun SPARC Enterprise T5240 Server

Asset ID:	1-72-1473756.1
Update Date:	2012-09-24
Keywords:

Solution Type Problem Resolution Sure

Solution 1473756.1 : All fans are reported faulty in a Sun SPARC Enterprise T5240 Server

Applies to:

Sun SPARC Enterprise T5240 Server - Version All Versions to All Versions [Release All Releases]
Information in this document applies to any platform.

Symptoms

Customer reports a multiple fan failure and is probably suspecting of a faulty fan power board.

Changes

The issue is associated to Bug 6989852 that causes the system to display a strange message and also causes the 0 rpm FAN failure for all fans.

Cause

There are HW related warnings reported from explorer data collection such as the following:

##### Tx000/showfaults_-v #####

Last POST Run: Fri Jun 17 12:35:12 2011

Post Status: Passed all devices
  ID Time FRU Class Fault
  1 Jul 05 13:48:08 /SYS/FANBD0/FM1 SP detected fault: TACH at /SYS/FANBD0/FM1/F0 has reached low non-recoverable threshold.
  2 Jul 05 13:48:02 /SYS/FANBD0/FM1 SP detected fault: TACH at /SYS/FANBD0/FM1/F1 has reached low non-recoverable threshold.
  3 Jul 05 13:48:18 /SYS/FANBD0/FM0 SP detected fault: TACH at /SYS/FANBD0/FM0/F0 has reached low non-recoverable threshold.
  4 Jul 05 13:48:13 /SYS/FANBD0/FM0 SP detected fault: TACH at /SYS/FANBD0/FM0/F1 has reached low non-recoverable threshold.

##### Tx000/showenvironment #####

/SYS/LOCATE /SYS/SERVICE /SYS/ACT
OFF ON ON

/SYS/PS_FAULT /SYS/TEMP_FAULT /SYS/FAN_FAULT
OFF OFF ON

(Note that ALL fans are reported faulty)

Sensor Status Speed Warn Low
/SYS/FANBD0/FM0/F0/TACH FAILED 0 4000 2400
/SYS/FANBD0/FM0/F1/TACH FAILED 0 4000 2400
/SYS/FANBD0/FM1/F0/TACH FAILED 0 4000 2400
/SYS/FANBD0/FM1/F1/TACH FAILED 0 4000 2400

Solution

Bug 6989852 is fixed in System Firmware 7.3.0 (patch 145676-01). Update to System Firmware 7.3.0 or higher.

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