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    • https://kb.netapp.com/on-prem/ontap/Ontap_OS/OS-KBs/During_controller_upgrade_new_hardware_will_not_boot_into_ONTAP
      Applies to ONTAP 9 Controller upgrade (headswap) Issue During a controller upgrade, new hardware will not boot and shows the following error: WARNING: there do not appear to be any disks attached to t...Applies to ONTAP 9 Controller upgrade (headswap) Issue During a controller upgrade, new hardware will not boot and shows the following error: WARNING: there do not appear to be any disks attached to the system. No root volume found. Rebooting... (press ctrl-c during boot to break reboot loop)