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)