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Asset ID: 1-72-2020891.1
Update Date:2015-06-22
Keywords:
Solution Type  Problem Resolution Sure

Solution  2020891.1 :   Oracle ZFS Storage Appliance: What action is required when seeing "SMP operation failed (ERROR_HW_TIMEOUT)" in the PMCS logs  

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In this Document


Symptoms


Cause


Solution



Oracle Confidential PARTNER - Available to partners (SUN).

Reason: shell commands used

Created from <SR 3-10709924752>


Applies to:  

Sun ZFS Storage 7420 - Version All Versions to All Versions [Release All Releases]
Sun Storage 7410 Unified Storage System - Version All Versions to All Versions [Release All Releases]
Sun Storage 7310 Unified Storage System - Version All Versions to All Versions [Release All Releases]
Sun ZFS Storage 7320 - Version All Versions to All Versions [Release All Releases]
Sun ZFS Storage 7120 - Version All Versions to All Versions [Release All Releases]
7000 Appliance OS (Fishworks)



Symptoms


When analysing the PMCS logs or a core file in the dropbox, you may see the following messages




2015 Jun  4 21:01:27.896448033 pmcs0:4: SMP operation failed (ERROR_HW_TIMEOUT)
2015 Jun  4 21:08:20.882422821 pmcs0:4: SMP operation failed (ERROR_HW_TIMEOUT)
2015 Jun  4 21:26:38.498537808 pmcs0:4: SMP operation failed (ERROR_HW_TIMEOUT)
2015 Jun  4 23:37:32.937758329 pmcs0:4: SMP operation failed (ERROR_HW_TIMEOUT)
2015 Jun  5 03:10:35.210431954 pmcs0:4: SMP operation failed (ERROR_HW_TIMEOUT)
2015 Jun  5 03:30:09.060644667 pmcs0:4: SMP operation failed (ERROR_HW_TIMEOUT)
2015 Jun  5 05:24:03.167444166 pmcs0:4: SMP operation failed (ERROR_HW_TIMEOUT)


 




 


Note: Only seen on the active node using the JBODs  (both, if in cluster)


 


Cause


This is because of a timing issue in the 'pmcs' (SAS-2) driver for the backend storage


 


 


Solution


If there are no other symptoms - then you can ignore the messages as 'informational'.


If there is another issue, most likely performance, then please raise a bug with RPE to determine the root cause


 


Note: Not all systems seeing this message have other faults.



 



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