Applies to ONTAP 9.4 or lower 9.5P12 or lower 9.6P6 or lower IOM12B Issue After running the shelf firmware upgrade on an IOM12B, the below errors are seen in the event logs: Cluster1::*> event log sho...Applies to ONTAP 9.4 or lower 9.5P12 or lower 9.6P6 or lower IOM12B Issue After running the shelf firmware upgrade on an IOM12B, the below errors are seen in the event logs: Cluster1::*> event log show Time Node Severity Event ------------------- ---------------- ------------- --------------------------- 11/23/2022 21:26:23 node-02 ERROR sfu.firmwareDownrev.shelf: Shelf 7a.shelf1 has downrev firmware. Every manual upgrade attempt also fails.