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Are your disks actually showing up? You can. Check via CLI or ui

Even for a few seconds - I'd suggest to use rdp. Its native, more performant and simply better. The console has one purpose in my eyes: troubleshoot network. OK. A second one: install. ;)

Why using a spare sitting around waiting for a failure? If you rebuild things consider a z2 setup. It will help you during recovery scenarios.

What does a "zpool list" show you? Sometimes I had issues with the pool name for whatever reason. But using the uid of the pool got me going...

Why are you using the console like this anyways? RDP is the far better approach

If not configured otherwise zfs will by default use up to 50% of memory. That means your host goes under heavy memory pressure trying to use swap, etc. This leads to pressure in your VMS and all sorts of side effects. Try to see with arcstat and arc_summary how your zfs behaves. After a reboot...

Depending on your workload you will probably eat up ssds pretty quick with zfs. This is one of the downsides of zfs... If you look for new ones at some time try to get some datace term ssds (even if they are used). The cheap consumer stuff as of these days does not play nicely... My old mlc ssds...

That means it is likely related to your "data ssd" Which ssd type are you using?

Could be an out of memory condition. Are you booting from SDA? Had once similar problems with USB sticks

Don't be mislead by the number of threads vs. Number of cores. Your system has 8 cores and 16 threads. https://ark.intel.com/content/www/de/de/ark/products/199325/intel-core-i710700kf-processor-16m-cache-up-to-5-10-ghz.html Hence your math is a bit off when assigning 8 cores ;) Even with 4...

Not everyone pays attention to this little but important detail. It is 10% in variation so worth a try

HP Array Configuration Utility Command Line Interface This may be the thing you are looking for. But that won't populate the data into the webui either. Just cli

Cool. Thanks for sharing! I was calculating / editing by hand :rolleyes:

Instead of a replace you can try to detach the device and add the new one. Maybe this moves you forward.

Never did a shrink. Experience with btrfs: 0 But when I increase a disk I also adjust the information in the VM config file to match reality. Also try a different version of gparted. Maybe your issue lies there. Once I got an issue where I wasn't able to do what I wanted for some incompatible...

Typically RAID controllers encapsulate that information and do not necessarily provide this to the OS. The logical volume you create ist an abstraction of the physical world. Hence you need typically additional tools to get to that data.

I was about to mention that. This is the most reasonable approach anyways IMHO. Why would you want to use these anyways? They limit the usage of registers and therefore impact performance. For some reason I don't see the point, except perhaps cross cluster live migrations... Not sure if this...

For me this simlly didnt work. Only having the driver installed still left my OS unbootable after the migration. Once there was a virtio disk (and the driver "properly loaded") I was able to switch the bootdisk type to virtio too. I have spent quiet some time figuring things out during my...

Check if your VG is actually active. Use vgdisplay and other commands to examine the status from the cli

This indeed indicates that either your OS crashed or it was powered off for instance through an out of memory condition as dunuin said. Since this message is posted on the next boot: what happens before that?