Go to Datacenter > Storage and make sure to select for each storage only the nodes that have that storage. Proxmox assumes all the nodes are equal, unless specified otherwise: https://pve.proxmox.com/pve-docs/pve-admin-guide.html#chapter_pmxcfs
That doesn't contradict anything I said. I was answering to someone that said that they were just using lvm+ext4, and I said that with such configuration they will not be able to use HA.
I'm myself using ZFS for the shared storage, but not for...