Guest

Cisco UCS 5100 Series Blade Server Chassis

Field Notice: FN - 63587 - No Output from UCS B-Series DC Power Supply After Power Feed Interruption - Hardware Replacement Required

Field Notice: FN - 63587 - No Output from UCS B-Series DC Power Supply After Power Feed Interruption - Hardware Replacement Required

Revised October 10, 2014
March 4, 2013


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
1.2
10-OCT-2014
Updated the Workaround/Solution section and removed the Upgrade Program section.
1.1
27-JAN-2014
Updated the How To Identify Hardware Levels and DDTS sections.
1.0
04-MAR-2013
Initial Public Release

Products Affected

Products Affected
UCSB-PSU-2500DC48
UCSB-PSU-2500DC48=

Problem Description

Output power is not restored when the input power feed is interrupted on affected Unified Computing System (UCS) B-Series DC chassis power supplies.

Background

Output power is not restored after the input feed of an affected UCS B-Series DC chassis power supply is removed and restored. The unit appears in UCS Manager as present, but the status is shown as not Ok. This problem is due to a firmware issue in the power supply. The power supply firmware is not field-upgradeable, so affected power supplies should be replaced with updated units. Refer to Cisco bug ID CSCuc47311.

Problem Symptoms

After input power feed is interrupted, the output power is not present, and the amber Fail Indicator LED is lit on the power supply.

Workaround/Solution

Short term workaround: Reseat the power supply. Turn off the power to the individual power supply and loosen the retaining screws. Slide the power supply out a short distance until it unplugs from the backplane and wait 10 seconds. Then slide the power supply back into its slot, tighten the retaining screws, and turn the power back on.

Long term solution: Replace the power supply. The proactive replacement program for this Field Notice has been closed, however replacements can be acquired via standard RMA. If you require replacement power supplies for this issue, contact the Cisco Technical Assistance Center (TAC) and reference Field Notice 63587 when you request an RMA.

DDTS

To follow the bug ID link below and see detailed bug information, you must be a registered customer and you must be logged in.

DDTS Description
CSCuc47311 (registered customers only) After removing/restoring power to DC PSU status is present but PS NOT OK
CSCuf03602 (registered customers only) Power supply VID not accessible from 'connect iom' shell

How To Identify Hardware Levels

Some UCS B-Series Blade Server chassis power supplies have been upgraded with corrected firmware. These units are marked with a deviation label D131186 as shown here:

Units with the deviation label have the corrected firmware, but display as Version ID (VID) 01 in UCS Manager.

UCS B-Series chassis power supplies that display VID 02 in the UCS Manager have the corrected firmware. VID 02 is reflected in the part number 341-0408-02 which is visible through UCSM or the power supply label. An example is shown here:

Note: Earlier versions of UCS Manager have a display bug, Cisco bug ID CSCuf03602, which can cause false display of VID 01 for this power supply regardless of the actual version. The issue is fixed in UCS Manager Releases 2.0(5c), 2.1(1f), and 2.2(1b). 

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:

Receive Email Notification For New Field Notices

Cisco Notification Service—Set up a profile to receive email updates about reliability, safety, network security, and end-of-sale issues for the Cisco products you specify.