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Thank you :) Since i cannot edit first post, the ovs blog is now migrated to this page: https://www.netvizura.com/blog/netflow-analyzer/open-vswitch-netflow-configuration

Or don't use zfs,use something that is unsupported like mdadm :D

Usually there is whmcs ,and ofc there is now open-source solution: https://github.com/The-Network-Crew/Proxmox-VE-for-WHMCS

If you don't plan on using CEPH, i would recommend doing it, and learning migrations, failovers etc.

Rarely i've found kingstons that are good, on the other hand pm893 are something of an industry standard for entry-enterprise disks. Yes they are read-oriented but work really great with everything proxmox.

My only recommendation (since i've held a few quick-courses in Serbia) is to get yourself familiar with core components of PVE + zfs,ceph, replication, backups etc. This is usually enough for 1 or 2 level courses.

ZFS will also lose data in some cases, but more important thing is to get ssds with PLP, than anything else.

Corosync, eg cluster networking, not HA directly.

Aha you are probably thinkin about HA. That one is with shared storage,so CEPH,NFS,etc. ZFS and hardware raid don't support HA in any way.

Who says raid controller is not supported in Proxmox? It works fine maybe last 10 years. It just doesn't have the features similar to zfs, but everything works. And snapshots are better than zfs's

Proxmox devs are wary of taking outside projects, my opinion is since the whole drbd license problem,where they changed the license overnight.

The main problem is here, you bought a vmware-endorsed san, which is maximally locked, and then you ask proxmox guys(100% open source) to fix this problem. So yes, it is hard to please someone who's left with locked-in tech.

If you want to learn, i would always recommend going with 3-node ceph,and lets say 2.5gbit card in every node just for CEPH communication. It will work okayish,and you will learn a lot from it. You can always add zfs disk-per-node, parallel to CEPH, if you want to learn zfs-sync/replication and...

You could bring up ceph on pbs, just install whole pve on it :)

If i'm not mistaken clonezilla doesn't support mdadm?

Move the data from the pool and to the pool and you will rebuild the metadata onto special device.

zpool list -v , and then look if there is any data on special device.

Restore from backup,the pool is gone.

Did you wipe the disk before adding it back?

Don't allow smb shares, atleast unauthenticated ones. First rule of anti-ransomware. Second, do the backups and snapshots,