Sun Blade T6340 May Power Off During SP Reset With Voltage Threshold Reached

Asset ID:	1-77-1302382.1
Update Date:	2011-03-11
Keywords:

Solution Type Sun Alert Sure

Solution 1302382.1 : Sun Blade T6340 May Power Off During SP Reset With Voltage Threshold Reached

Applies to:

Sun Blade T6340 Server Module - Version: Not Applicable and later [Release: N/A and later ]
Solaris SPARC Operating System - Version: 10 10/09 U8 and later [Release: 10.0 and later]
Information in this document applies to any platform.
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Date of Workaround Release: 09-Mar-2011
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Description

Sun Blade T6340 host could be powered off unexpectedly during ILOM SP reset, caused by a voltage threshold being reached.

Likelihood of Occurrence

This issue can occur on the following platforms:

Sun Blade T6340 with Firmware version up to and including 7.3.0.c

Notes:

1. No other systems or blades are affected by this issue.

2. Contributing to the cause of this issue (as described in CR 7023504), ILOM falls back to using default thresholds from the sensor xml files for 1.1V rails. The values recorded in these files are lower than what they should be and need to be adjusted.

To determine the Firmware version on the T6340, the following command can be used:

sc> showhost
Sun System Firmware 7.2.8 2010/03/15 10:43
...
...
sc>

Possible Symptoms

Should the described issue occur, the following error messages will be seen in the SP (Service Processor/ILOM) event logs:

sc> showlogs -v
Feb 27 02:08:17: IPMI    |minor   : "ID =   1d : 02/27/2011 : 02:08:17 :
Voltage : /MB/CMP1/V_+1V1 : Upper Non-critical going high : reading 1.25 >= threshold 1.20 Volts"
Feb 27 02:08:22: IPMI    |minor   : "ID =   1e : 02/27/2011 : 02:08:19 :
Voltage : /MB/CMP0/V_+1V1 : Upper Non-critical going high : reading 1.25 >= threshold 1.20 Volts"
Feb 27 02:08:22: IPMI    |major   : "ID =   1f : 02/27/2011 : 02:08:22 :
Voltage : /MB/CMP1/V_+1V1 : Upper Critical going high : reading 1.25 >= threshold 1.23 Volts"

Workaround or Resolution

The following is the only known workaround at this time, which requires downtime to be scheduled:

Reset the SP when the host OS is not running i.e: host is brought to standby first in this state. In this case there are no voltages to monitor and therefore no incorrect action will be taken.

Note: Although downtime may not be desirable, it is being suggested to avoid the potential of an unplanned outage.

Modification History

Date of Workaround Release: 09-Mar-2011

Internal Comments:
-
Note:
Specific Product and Platform choices have been added to this
Sun Alert to conform with and enable MOS Hot Topics delivery.
(for this doc: Solaris SPARC Operating Systems)
If you have any questions about these items, please email:
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Please send technical questions to the following email:
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and copy the Responsible Engineer listed
Internal Contributor/Submitter: [email protected]
Internal Eng Responsible Engineer: [email protected],
[email protected], [email protected]
Internal Services Knowledge Analyst: [email protected]
Internal Eng Business Unit Group: Systems Group
SVS (SPARC Volume Systems)
Internal Escalation ID: 3-3067747787

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