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I'm glad you found a solution for this one, identifying a bad CPU is particularly hard. Was there a particular thing that you spotted in the logs, or was it a matter of swapping components until the problem went away?

You've posed an interesting question there. Now, I have found an article that you will find quite educational in getting from A to B: https://nikvdp.com/post/cloning-a-linux-install/ Now, it doesn't tell you how exactly to do it, but it provides a lot of very useful information. The kind of...

Only mentioned 200, as it's in Ops opening message. The similarity seemed interesting.

Actually, look at that replication log, do you eventually notice a sudden massive increase in the read speed and a large drop in written data, even 0? It still has to check all the underlying blocks, but skips ones not allocated; on the surface it looks like it's copying the full VM amount, but...

I notice your mystery machine of ID 152 comes immediately after VM ID 150. Might I suggest what you are looking at is this: 10010110 -> Mysterious energetic bit flip -> 10011000 VM 199 to VM200: 11000111 -> Mysterious energetic bit flip -> 11001000 Do you see my point? How the last 4 bits...

At the moment, I'm inclined to say do what works. It shouldn't hurt, and will only restrict how many things you can run, or affect the total size of the Arc Cache if you are using ZFS. As it is, the other stick is 16GB, and can be used in a variety of other projects with ease. Actually, if you...

I had a problem with memory myself and ended up going for a pair of G.Skill Trident Z RGB 32GB sticks. Those things just work, so a 2 x 16GB kit would probably work on your end. Or at least, let me put it this way, I've not run into a problem with better memory. Having said that, ECC RAM does...

The main thing is you have identified a cause, which is RAM stick 2, so that's excellent progress. My thought is the timings might be laxer when the stick is on its own, so a tiny fault here and there won't cause major problems. In the case of two sticks, where timing has to be correct at all...

"To start, you’re going to need an environment on which you can build the image. Ubuntu makes this pretty straightforward, so we’ll use that for this tutorial." So, are you using Ubuntu for your base image? I reckon, looking at that screenshot of yours, you are attempting to install those...

Agreed, but here's the thing, what actually happens on your setup? [Could be an interesting experiment, perhaps it does not work as expected, revealing some other overlooked issue which is a cause of the main fault.] You know, is it a race condition? It would certainly explain the randomness...

Would this be of help? https://blog.stackattack.net/2022/03/09/custom-proxmox-ve-lxc-images/ And the... ultra simple but questionable way: https://www.sbarjatiya.com/notes_wiki/index.php/Create_custom_container_template_in_proxmox

I'm going to ask a silly question, does stop mode always work fine for backups? [Yes, I know it is not ideal, but I'm interested if it also fails with a frequent backup cadence on your setup. Just use a demo instance.]

Are you using let's encrypt to produce the SSL certificates? Each time those refresh [approximately every 3 months], the fingerprint of the PBS will change, and you need to enter the new fingerprint into the Proxmox nodes so that they can connect to PBS again. You could make a custom...

I highly recommend you do so; also, take a backup :) If something goes wrong, you can restore it, and try a different method. If you find difficulties, I recommend downloading an ISO image of Ubuntu, then booting the Windows VM using that ISO image. gparted has some nice functionality...

Well, if you are making a custom image, you have total control as the vendor. This means that as part of the installation, you can have your own version of each configuration file, including settings such as allowing root access over ssh. Another way of thinking of it, someone makes the...

All good, and this is very useful to know; at least you were nudged in the right direction ;)

The only way would be to ensure the VMs are stored on an entirely separate array, and that you can restore a backup of the settings to a new PVE install. My general method at the moment is to add a disk with a new installation, restore the configuration backups, and then proceed to work on the...

I suspect they customise their installations and the deployment images.

I'm not sure about this one. A potential idea, though, would be to check the smart values of each disk. When the array runs into trouble, compare the values. That way, you'd be able to determine if the disk is repowering, or some other issue; especially ECC issues, which may indicate noisy...

It should work, but be careful. The idea is you create the target file first on the USB backup drive; it needs to be the right size. Then you convert the ZFS instance into it using salvage etc. I highly recommend reading about those commands so you understand them a bit more.