Asset ID:	1-73-1019695.1
Update Date:	2010-06-30
Keywords:

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Solution Type  FAB (standard) Sure

Solution  1019695.1 :   Fan Connectors on the Fan Boards are being damaged upon Fan removal/replacement for systems using the Jake 1U chassis.  


PreviouslyPublishedAs
244006

Product
Sun Fire X4140 Server
Sun Fire X4150 Server
Sun SPARC Enterprise T5120 Server
Sun SPARC Enterprise T5140 Server

Date of Preliminary Release
22-Oct-2008

Fan connectors on the Fan Boards can be damaged (see details below).

Affected Parts:

541-2112   Fan Power Board, RoHS:Y
541-2802   Fan Module, RoHS:Y
541-1984   Fan Module, RoHS:Y

Impact

Fan connectors on the Fan Boards can be damaged upon Fan removal/replacement.  If the connector is damaged once the fan module is removed, that location will not be able to be used subsequently.  The system may still operate but there is a risk of the system overheating.

Contributing Factors

Fans should not be rocked back and forth when being removed.  Rather they should be pulled straight up, using care to avoid damaging the Fan Board connectors.

Symptoms

The fan will not be able to connect properly to the fan board and the system may show the warning message "fan not present in fanbd0/fan1".

Root Cause

The fan board connectors cannot withstand the lateral pull forces applied if the fan is removed at an angle.

Corrective Action

Workaround:

Care needs to be taken when fans are removed/replaced to avoid damaging the Fan Board connectors.  Fans should not be rocked back and forth when being removed.  Rather they should be pulled straight up, using care to avoid damaging the Fan Board connectors.

Resolution:

The Mechanical Engineering Team is currently validating a longer term, more robust, design fix for this issue.  Once validated and implemented, the improved Fan Board design will be cut into production.

For information about FAB documents, its release processes, implementation strategies and billing information, go to the following URL:

• http://tns.central/fab

For Sun Authorized Service Providers go to:

• http://tns.central/SPE/fab/

In addition to the above you may email:

• FAB-Manager@sun.com

Internal Contributor/submitter
Jake.Bell@Sun.COM

Internal Eng Responsible Engineer
William.Demeulenaere@Sun.COM Responsible Manager: Sean.White@Sun.COM

Internal Services Knowledge Engineer
Joe.Davis@Sun.COM

Internal Eng Business Unit Group
SSG WGS (Workgroup Systems) NSG (Network Systems Group)

Internal Sun Alert & FAB Admin Info
20-Oct-2008: Completed draft and sent to Extended Review.
22-Oct-2008: No usable feedback from Ext Rvw - sending to Publish.
01-Dec-2009: Corrected Product Name to swoRDFish inconsistency.


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