To retire node1, you resume the automated operation to disable the HA pair with node2 and shut node1 down properly. You must later remove node1 from the rack or chassis.
Resume the operation by using the following command:
system controller replace resume
Verify that node1 has been halted by using the following command:
system controller replace show-details
You can decommission node1 after the upgrade is completed. See Decommission the old system.