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When you enable VM Manager, libvirt image is created if it doesn't already exist. Similarly when you enable Docker, docker image is created. These are in Settings, and you can also disable / delete the images there.

Probably would have been better if you had recreated the docker image instead of moving it. And no point in having libvirt if you aren't doing VMs.

Try it and see

Seems very unlikely to me that a Kingston DataTraveler would not have a consistent GUID. Are you sure you are using the same flash you registered?

If you start the array I assume it will begin rebuilding disk4 again. Post a screenshot of Main - Array Operations.

Plenty of people have managed to fill docker image with only one misconfigured docker. Just setting the transcode destination for plex to an unmapped path for example would do it. Not that I think that is your problem.

Looking at the specs for that mobo, it also has USB2 ports available. Are you plugging into those?

Then be sure to setup Notifications to alert you immediately by email or other agent when a problem is detected. As for updates, plugins are also updated so they keep current with the Unraid core. This user community is really one of the best features of Unraid so don't hesitate to take advantage of it.

Unraid is linux at the cli.

Unraid IS NOT RAID. It has some similarities to some RAID configurations, but each disk in Unraid is an independent filesystem, no striping. Parity gives some redundancy for those disks. So you can do whatever you want with the disks, dedicate one to CCTV or whatever. You can even have disks outside the parity array with the Unassigned Devices plugin if you don't want to get parity involved. And there is also the cache pool which can be various btrfs raid configurations. Take a look at the Product pages (link at the top of this page) and the Wiki Overview page: https://wiki.unraid.net/UnRAID_6/Overview

I don't see anything obvious, except your system share has files on the array instead of cache where they belong. Possibly you created docker and/or libvirt image before you added cache so they got created on the array. You don't mention any VMs, do you have any? Docker image isn't full now but maybe you overfilled it in the past, so I guess it's possible you have docker image corruption, but syslog doesn't have much after the reboot so can't really tell anything from that. Didn't take the time to look at SMART for all of your disks. Are you getting any SMART warnings on the Dashboard? You might delete docker image and recreate it so it will be on cache. Apps - Previous Apps will add your dockers back just as they were. I'm not familiar with some of those plugins but CA and UD should be fine. Maybe try running without the others for a while. Setup Syslog Server so you can retain syslogs after rebooting and maybe we can tell more if you continue to have problems.

Everything about your configuration is in the config folder on Flash. If you can't copy that to your new Flash then safest thing is to assign all disks as data and none as parity, then start and see which ones mount. Only parity should be unmountable. Come back for more advice if you have problems.

Go to Tools - Diagnostics and attach the complete diagnostics zip file to your NEXT post. Don't do anything without further advice.

Go to Tools - Diagnostics and attach the complete diagnostics zip file to your NEXT post. Don't do anything without further advice.

Go to Tools-diagnostics and attach the complete Diagnostics zip file to your NEXT post.

Your post doesn't mention Unraid, and your link is about hosting VMs in ubuntu. Are you trying to host your VMs in Unraid? Unraid OS is the whole point of this forum. If your question is about hosting VMs in some other OS you are in the wrong place.

No and No Read speed is the speed of a single disk, since each file is completely contained on a single disk (no striping). Write speed is somewhat slower due to realtime parity updates. Your questions completely miss some of the benefits of Unraid though. Each disk in Unraid is an independent filesystem that can be read by itself on any Linux (no striping as mentioned). Unraid lets you easily add disks without rebuilding the array, and lets you use different sized disks in the array.

Things written to flash won't get flushed, but writing a lot constantly to your boot flash drive isn't recommended.

Assuming that is your Unraid server IP Make sure you have no other browsers open to the Unraid webUI, including mobile apps. Try clearing browser cache. What browser are you using?

Are you sure the flash has only one partition? Maybe try preparing the Unraid flash again. Or try the manual method to prepare flash: https://wiki.unraid.net/UnRAID_6/Getting_Started#Manual_Method_.28Legacy.29

This suggests it isn't finding anything to boot. Make sure the USB is the only bootable device.

Have you tried a USB2 port? USB2 is often more reliable for the Unraid boot flash. What exactly is the result when you try to boot?

Do you have a link to those reports?

Yes, that df is what I was looking at in diagnostics, but I see I was fooled by the fact that it was 67% used because you have so little RAM. Can you add more memory? I don't recommend trying to run dockers without at least 4G, and more is better. Your little RAM is the reason you had to upgrade manually, and is possibly the reason your email is failing. You could try disabling the docker service, reboot, then see if the email will work.

Let me see if I understand. You are running Unraid itself as a VM in ESXi, and you are trying to setup a VM with that virtual Unraid as the host? So a VM within a VM? Running Unraid itself as a VM is not supported, but we do have a subforum for people who are virtualizing Unraid, and I can move your post there if you want. I don't know if anybody there can help you or not. Probably you will get more help if you simplify and run Unraid bare metal.