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Cisco UCS C-Series Rack Servers

Field Notice: FN - 63567 - UCS C220 M3 LFF Disk Backplane Component Leads Might Short and Cause System Shutdown - Hardware Replacement Required

Revised December 24, 2013
December 12, 2012


NOTICE:

THIS FIELD NOTICE IS PROVIDED ON AN "AS IS" BASIS AND DOES NOT IMPLY ANY KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTY OF MERCHANTABILITY. YOUR USE OF THE INFORMATION ON THE FIELD NOTICE OR MATERIALS LINKED FROM THE FIELD NOTICE IS AT YOUR OWN RISK. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE THIS FIELD NOTICE AT ANY TIME.

Revision History

Revision Date Comment
1.1
24-DEC-2013
UMPIRE Program Replaced with Fix-on-Fail Replacement
1.0
12-DEC-2012
Initial Public Release

Products Affected

Products Affected
UCSC-C220-M3L
UCSC-C220-M3L=

Problem Description

Component leads that protrude from the hard disk drive backplane might short against the hard disk drive stopper if it becomes bent due to excessive force. The shorted leads might cause component damage, unexpected system shutdown, or possible thermal event. If encountered, hardware replacement is highly recommended.

Background

A UCS C220 M3 LFF unit failed during Manufacturing Final System Test (FST) due to fuse leads from the hard disk backplane that come into contact with a bent/misaligned hard disk drive stopper on the chassis. The bent stopper allowed hard disk insertion force to push it through the protective Mylar cover and cause a short against fuse leads. The short caused a brief thermal event of less than one second and subsequent power supply shutdown.

There has only been a single occurrence of this issue which happened during a Pilot of prereleased product in the factory. There have been no occurrences in the field.

Analysis of the test failure has concluded that this failure can only occur when the hard disk drive stopper becomes bent out of specification, and a user attempts to install a hard disk drive. Rework and revision to the hard disk backplane shortens the extended fuse leads to prevent protrusion through the protective Mylar over the backplane. An additional test has been added to the manufacturing process in order to confirm correct alignment of the hard disk drive carrier.

Problem Symptoms

If the hard disk drive stopper becomes bent, forcible insertion of a hard disk drive assembly into any slot with the bent carrier might cause power supply failure due to an overcurrent event and immediate ungraceful shutdown.

Workaround/Solution

Cisco recommends a fix-on-fail replacement strategy for this chassis assembly with a new chassis that contains a revision 02 hard disk backplane. A replacement chassis will be provided at no extra charge. Serial number(s) of your original chassis are required.

Additional items used during chassis replacement activity include thermal grease, a cleaning kit, or pick and place tools. 

  • For each UCS C220 M3 LFF chassis, one CPU Cleaning kit and one Thermal Grease kit should also be ordered.
  • For each customer installation site, one CPU Pick and Place tool should be ordered.

As of approximately September 28, 2013, the new products that were manufactured under Engineering Change Order (ECO) E111581 or deviation D130065 are guaranteed to be free of this problem.

Refer to the How to Identify Hardware Levels section for instructions on how to view the version and deviation of in-service product.

Although an upgrade program had previously been provided to replace potentially affected but otherwise working product, the upgrade program is now over and Cisco will only replace product that has actually failed. The standard RMA process should be used to replace failed product.

How To Identify Hardware Levels

UCS C220 M3 LFF chassis with updated hard disk backplanes can be identified by one of these methods:

  • Deviation label on the chassis exterior and packaging with the number D130065.
  • The Cisco Part Number revision on the chassis label reads 74-9933-02 or higher.

Deviation

Deviation D130065 has been applied at the factory for rework to in-house units.

For More Information

If you require further assistance, or if you have any further questions regarding this field notice, please contact the Cisco Systems Technical Assistance Center (TAC) by one of the following methods:

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