The UCS infrastructure components were upgraded to 4.0.4m and both FI reported the following error:
Partition bootflash on fabric interconnect A is clean but with errors.
The plan of action to resolve this issue is to run the command 'reboot e2fsck' one at a time on both FIs. The commands can be run from the local management of the FI (login to UCS CLI then run the command 'connect local-mgmt a|b') .
Hopefully the issue resolves after the fsck process completes. This process requires a reboot of the FIs and that can be disruptive if UCS is not configured right.
If the fsck process doeesnt fix the issue then the plan is to raise a case with CIsco TAC .