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    • https://kb.netapp.com/on-prem/ontap/OHW/OHW-Issues/CONTAP-205642
      Issue Storage failover not possible, after a head HW upgrade, reusing the "old" controller chassis. "::> storage failover show" output example: Takeover is not possible: Storage failover interconnect ...Issue Storage failover not possible, after a head HW upgrade, reusing the "old" controller chassis. "::> storage failover show" output example: Takeover is not possible: Storage failover interconnect error, NVRAM log not synchronized, Disk inventory not exchanged Interconnect Links RDMA Interconnect is down <<<<< "::>system ha interconnect status show" output example: Link 0 Status up Link 1 Status up IC RDMA Connection down <<<<< Is Link 0 Active true Is Link 1 Active true Backplane mismatch f…