I don't really remeber about the solution, but assume I deleted the old logfiles too. I did never observe the same failure again. I'm also running xcp-ng on a Supermicro X11 with a XEON Silver 4210 CPU.

That would be interesting to get some pointers (like serial debug and so on). I wonder if there's already some resources for Xen Project somewhere

Good afternoon @olivierlambert !) Most likely caused by the virtual machine itself. Because all the other VMs were fine) and the VMs are all on the same disks. According to the load and smart physical disks, everything was normal. Also, when restarting the problematic virtual machine, the problem did not disappear. We didn't want to recover from backup, because it would take a lot of time and it was decided to move the virtual machine to another physical disk.(After that, the VM load problem disappeared)

@Andrew Good suggestion, might as well pick some up, thanks!

@Andrew thanks for your reply. I have more than enough cores and memory slots for one CPU so I guess I’ll put one of the CPUs in the drawer.

@andyhhp well I took way longer than I said I would, but I promise I still wanna work on this lol. Here is the link to the thread that shows my crash reports. As a reminder, this crash happened on this host randomly and didn't seem directly related to PCI passthrough, or at least not the driver install part which I was having issues with. https://xcp-ng.org/forum/topic/5900/host-crash-once-in-a-long-while

@Darkbeldin let hope I am lucky

@olivierlambert thank you Olivier. Indeed you are right, we need to change also the max vcpu limits in advanced. [image: 1653224017629-0cc87b88-9234-4671-bf18-4280acd996cd-image.png] Then is booting normally.

Hey thanks for the feedback

Sure, Another thing is that included iPXE is a version that does not support multipath SAN boot (I guess it would be nice to update it)

@AndreS That’s great thanks very much AndreS!

If you have a valid XOA license, then you always have the option of opening a support ticket. Anything unusual / different about this VM? How many disks attached? P.S. I assume that you're aware that Windows 2008 isn't officially supported any longer.

@alejandro-anv I have had problems like this on my NFS and iSCSI SR's previously. One thing that might help is to shutdown the VM's before doing a re-scan. If my memory serves me, it does a different kind of coalesce (online vrs offline) and this has a better chance of success. Also, be aware that from the time you re-scan and the time it actually starts to do work on the drives is 5 minutes. When I have a problem like this, I normally ssh into the pool master and tail the logfiles to watch it work. IE: tail -f /var/log/SMlog | grep SMGC Its boring.. But.. it gives me a bit of comfort between prayers 8-)

@olivierlambert said in XCP-ng 8.2 hangs on shutdown: Yes that's what he said (ISO SR in a VM) Ah yes. I see that. Oups.

@Danp I will try to install latest updates

OK @olivierlambert was correct, I mistakenly had enabled secure boot previously before the update so it was already on when I did the reboot. Just tested things in my home lab again and they did NOT change from disabled to enabled, so good to go! Thanks!