Safely rebuild PVE node?

After a botched ZFS rpool mirror-1 replacement it somehow converted itself to a full ZFS raid-0 on that same pool. I've tried different ways in fixing it but at the end it now makes sense just move the VMs and replication off of that node and rebuild it using new node name and IPs.

I've read the instructions on how to properly remove the node from the cluster but the part that bothers me is that I should power off the node before I use the remove node command on the other node. Since the...

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