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Man sichere vorher (mindestens) die "storage.cfg" und vor allem den Encryption-Key, sonst hat man möglicherweise Startschwierigkeiten beim neu aufbauen...

Great! Just make sure to use two independent physical connections. All VLAN in a single trunk will possibly fail at the same time... Sure. The limiting factor is (high) latency. And because that is often induced by congestion it should be separated from the high-traffic frontends and/or storage...

The "Advanced" part of the "Add: Sync Pull"-Dialog has a "Transfer Last:" option. Just enter "1" to transfer only the single newest backup :-)

PVE is Debian with a modified Ubuntu kernel. If the controller is supported by it, then PVE does. But..., well..., for PVE the usually used filesystem is ZFS. ZFS wants to have direct access to the hardware storage devices. So please, do NOT use any hardware RAID controller. (This has been...

You have "Streaming: off". Did you test "on"? I have good success with that turned on - window movement feels much faster. Probably this depends on several factors... and I do not have any benchmarks. Unfortunately I do not remember pre-conditons or other details...

Aus der Hüfte geschossen: Du kannst mal testen, was geschieht, wenn du zfs set canmount=off rpool/enc setzt.

I believe that term lacks a fixed meaning in PVE context. (Is it Corosync? Migration? Management? What is it?) For migration you can specify the to-be-used network under Datacenter --> Options --> Migration Settings --> Network :-)

Although you wrote I would nevertheless like to mention the official tool "pve-network-interface-pinning" --> https://pve.proxmox.com/wiki/Network_Configuration#_naming_conventions

Ohne sync=1 ist das ganze asynchron - und "normal" im Sinne, dass nur im üblichen 5-Sekunden-Takt geschrieben wird. Da wird RAM + CPU-Leistung getestet, nicht die NVMe. Aber ja, das ist dann eher "real world" als mit sync=1.

Do you have a specific reason to use this "ancient" release? If not... please upgrade to (non-subscription): ~# pveversion pve-manager/9.1.6/71482d1833ded40a (running kernel: 6.17.13-1-pve)

Usually the relevant .iso has been downloaded to (and is stored on) the same PC where I am using the web browser for iDrac on = my local PC. The whole point of this mechanism is that the .iso is not copied to the server ahead of (boot-) time but used "directly" via iDrac from the disk on my...

It should do so: https://www.dell.com/support/kbdoc/en-us/000124001/using-the-virtual-media-function-on-idrac-6-7-8-and-9#idrac6

A single vdev? That's worst case - there is no way no make it slower than that! (Even a RaidZ3 has the same IOPS = same speed...) My recommendation would have been 7*mirrors --> seven times the IOPS of that construct... Sorry, I have no trivial cure for that situation. You may increase the the...

Sure. My post says nothing against that approach - disabling ssh for root (originating from the PVE cluster) is okay for a PBS+QDev too :-)

The Quorum Device cannot access the cluster via ssh. The cluster can access the Quorum Device - until you remove the rights granted during installation: https://forum.proxmox.com/threads/fabu-how-to-setup-a-quorum-device-and-secure-it-by-disabling-root-access.181525/

We did not verify this at that time. I did it now, a few months later: https://forum.proxmox.com/threads/fabu-how-to-setup-a-quorum-device-and-secure-it-by-disabling-root-access.181525/

Usage of the Quorum Device It kicks in automatically. Now we got “7” instead of “6” votes = one more than at the beginning: root@pna:~# pvecm status ... Votequorum information ---------------------- Expected votes: 7 Highest expected: 7 Total votes: 7 Quorum: 4 Flags...

Statement: it is not required to allow root@cluster to login to a separate “Quorum Device”-machine after installation. The “tl;dr” boils down to a single line: ~$ echo "PermitRootLogin no" | sudo tee /etc/ssh/sshd_config.d/permitrootlogin.conf (( This is Debian, and it comes without “sudo” by...

First: typo? It is "sysctl.d"... Second: what is the filename? Only *.conf is evaluated.

So hätte ich das (als Ceph-Laie) nicht formuliert. Das, was Ceph unbedingt braucht, ist ein schnelles Netz - oder auch zwei. Und zwar idealerweise ein separates. Für mich hört sich das echt nach Storage-Area-Network an ;-)