Field Notice: FN - 72479 - Upgrade to Release 4.2(2a) Will Fail for B-Series M5 Servers - Workaround Provided

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	Publish Date	Comments
1.0	01-Sep-22	Initial Release

Products Affected

Affected OS Type	Affected Software Product	Affected Release	Affected Release Number	Comments
NON-IOS	Unified Computing System (UCS) Server Software Bundle	4.2	4.2(2a)

Defect Information

Defect ID	Headline
CSCwa97427	Upgrade to 4.2(2a) will fail for BSeries M5 Servers (BMC Image Oversize)

Problem Description

After an upgrade to Cisco Unified Computing System (UCS) Release 4.0(4m) Blade Bundle (B-Bundle) or earlier to blade Release 4.2(2a), a B-Series M5 blade might lose all management capabilities. The server will not be recoverable.

Background

Only Cisco UCS M5 Blade Servers (B200-M5 and B480-M5) that run Release 4.0(4m) or earlier are susceptible to this defect. This issue does not impact Cisco UCS Fabric Interconnect or Cisco UCS C-Series Rack Servers when they have been upgraded to Release 4.2(2a).

Problem Symptom

When the blade firmware is upgraded to Release 4.2(2a) directly from Release 4.0(4m) or earlier, the update process will fail. From a Cisco UCS Manager GUI perspective, the blade will disconnect for an update and never become visible again, and the “invalid FRU: mismatch-identity-unestablishable” message will be displayed. The server will become permanently unmanageable.

An example fault is shown here:

Severity: Minor
Code: F0320
Last Transition Time: 2022-08-04T18:27:29.054
ID: 419779
Status: None
Description: Server 1/6 (service profile: org-root/org-<ORG>/ls-<LS>) has an invalid FRU: mismatch-identity-unestablishable
Affected Object: sys/chassis-1/blade-6
Name: Compute Physical Unidentified
Cause: Identity Unestablishable
Type: Equipment
Acknowledged: No
Occurrences: 2
Creation Time: 2022-08-04T18:26:34.176
Original Severity: Minor
Previous Severity: Minor
Highest Severity: Minor

Workaround/Solution

Do not upgrade Cisco UCS B-Series Servers directly to Release 4.2(2a) from Release 4.0(4m) or earlier.

If an upgrade to Release 4.2(2a) is required, complete these steps:

1. Upgrade to any Cisco UCS 4.1 release.
2. Upgrade to Release 4.2(2a). Releases 4.0(4n) and later have a check in place to allow for a successful and safe upgrade to Release 4.2(2a).

Note: If a server is upgraded from Release 4.0(4m) or earlier directly to Release 4.2(2a), it will become unrecoverable. There is no possibility of recovery from this upgrade failure. The blade will need to be replaced.

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:

• Open a service request on Cisco.com
• By email or telephone

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