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internet use 1500 mtu, so it's not going to work. At best, your router will refragment pakets to 1500. (you router lan need to be also 9000 btw)

not yet

That's seem pretty low. what is your cpu and what is your nic ? does the nic support vxlan offloading ?

when you edit /etc/pve/corosync.conf (in normal conditition, when you have quorum and write access to /etc/pve), the file is copied locally to each node in /etc/corosync/corosync.conf , then corosync is restarted. if you have done change ip or hostname change, and you don't have access to...

It's really looks like an hardware problem (maybe bad memory)/

The problem is, and I've read this somewhere else on the forums: that clustering only officially 100% works with nodes being on the same physical layer 2 network since corosync 3.X, it's use unicast udp (before it was multicast), so it's working on layer3 network. (I'm using it in a full l3...

can you try to add issue_discards=1 in lvm.conf ? (I'm sure it's working at lvremove , I don't known if it's mandatory when discard send by the guest os) Do you have good performance with ocfs2 ? Each time I'm trying I have pretty bad performance without preallocation full. and internal...

another thing not yet implemented is thin provisioning, where it'll be possible to have a smaller lvm volume than the defined size, with auto-extend of lvm volume. So, currently, each snapshot use the same size than the base lvm volume

linked clone are not yet implement, but technically possible.

hi, I think that the option is not yet exposed in the gui, but you need to add "external-snapshots 1" in lvm storage option in /etc/pve/storage.cfg Then, create a lvm disk with qcow2 format (not sure the format is already exposed in the gui too): qm set <vmid> -scsi0...

live migration with or without HA is exactly the same process. Personnally, I never had a single corruption in 15 year (with around 4000vms in production). What is your shared storage ? same cpus on differents hosts ?

--zero only zeroing first kb , and it's enabled by default https://linux.die.net/man/8/lvcreate

you really should use fleecing option in your backup advanced option. (you can use same ceph rbd storage than your main vm). (btw, I hope than your cephfs storage for your backup is not in the same ceph cluster than your production rbd storage, right ? ;)

It's look like the initramfs don't have the virtio-scsi module. (I have seen this with some almalinux recently coming from vmwarre too) maybe check this doc, it should work on proxmox too ...

It should be isolated without nat. The only way with nat without firewall could be to create vrf like for evpn zones, but It'll need some route leaks between main vrf , so I'm not sure it's reasy without a routing daemon like frr.

systemctl status pve-ha-lrm ? systemctl restart pve-ha-lrm

are all the nodes on the same site/datacenter ? what is the normal network latency between them ?

you don't need fingerprint with signed certificate from an authority (commercial or letsencrypt). only self signed certificated need it

try to boot on ide first Then, you can convert to virtio-scsi - change your controller to virtio-scsi instead lsi - add a second temporary small disk in scsi0 install virtio-win drivers in windows stop the vm delete the temporary disk switch from ide to scsi to your first disk see...

I'll try to get it for pve9 https://lists.proxmox.com/pipermail/pve-devel/2025-July/072194.html