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XFS does not suffer from the severe degradation in write speed on full drives like reiserFS does so you should be OK.

By default a New Config always assumes parity is no longer valid. If you thought it was there was the option to tick the Parity Is Valid checkbox before starting the array and that would have avoided rebuilding parity. Of course ticking that checkbox when parity is NOT valid is not a good thing to do

It might be worth trying NoMachine to see if that satisfies your needs. It performs much better than VNC and also supports sound.

You can easily mount a NTFS formatted drive on an Unraid server using the Unassigned Devices plugin. UD can also (optionally) share the drive over the network.

It is likely that the initial burst of speed is from caching in RAM. You are never going to get anywhere near the drives raw speed for the reasons given here although that link also gives suggestions for getting the best speed.

What makes you think it should be going much faster? That is not an atypical speed when copying to a drive in the parity protected array. You might find this section from the Unraid online documentation to be relevant?

This shows user share contents OMITTING any files belonging to those shares that are on the cache. Note, however, that Limetech have stated that the /mnt/user0 mount point is now deprecated and likely to disappear in a future Unraid release.

Is it intended behaviour that adding a new peer switches the WireGuard status to inactive or is this a bug? EDIT: On further investigation this seems to only happen sometimes and I have not yet discerned the pattern.

If you read the release notes for the 6.8 release you will see this is by design. As part of the tightening of security on the flash drive it is now no longer for any file located there to have the executable bit set. Possible solutions are: copy the files elsewhere (e.g. /usr/local/bin) during the Unraid boot process and then set the required permissions. Such copying can be done either via the ‘go’ file or via the User Scripts plugin. scripts can be executed from the flash drive by preceding them by the command name (e.g, bash path-to-script) scripts can also be executed via the User Scripts plugin which will handle this change correctly.

No. Change them to Use Cache = “Prefer”; disable the Docker and VM services; and then run mover to get files moved to cache. Included drives then becomes irrelevant if the files are not on the array. Once the files are on the cache you can (optionally) change them to Use Cache = Only if you want.

I had missed that

I would be very surprised if the flash drive even had SMART support.

Unfortunately not. Unraid is such a cut-down Linux build that tHere is no realistic way to install your own drivers, it has to be done from the Limetech end.

New Config is an option on the Tools tab of the Unraid GUI.

Unraid 6.8 has WireGuard VPN built-in, although you currently need to install the WireGuard plugin to get the GUI configuration component. There is also a choice of OpenVPN dockers that can be installed.

You have to have at least one drive in the array. Do you have a drive you can use for that purpose? if you do then you could do the following basic process: Add the second SSD as a Cache device formatted to BTRFS move the VM to the new cache drive do a New Config and create a new array without the first SSD but including the drive to be used as the array device add the first SSD to the second one already in the cache to create a cache pool.

I would say zero chance as Unraid only runs on x86 compatible hardware. There is no ARM version.

Do you know what IP subnet the dockers and problem sites are on? I have encountered routing issues where the remote subnet and the LAN end are on the same subnet. Not sure if this is an inherent problem or I just do not know how to set up things correctly, but just in case I have moved my home LAN to not be on 192.168.0.x or 192.168.1.x ranges as these are commonly used elsewhere.

Check that you do not have 2 disk controllers on the motherboard (which is quite common) and if so that they are both set to use AHCI

You could use the Mover Tuning plugin to achieve this. This may not always be the ideal answer, though, if you can download faster than mover can transfer the files to the array. Alternatively make sure the Minimum Free Space value under Settings->Global Share Settings is larger than the largest file you expect to download and then when the cache free space drops below this any new downloads will start by-passing the cache rather than failing.

As long as you are running Unraid 6.7.2 or later you can configure Settings->Syslog to keep a copy that survives a reboot (and is appended to after the reboot).

This is covered here in the online documentation. If anything is unclear ask questions before proceeding as you do not want to lose data through taking inappropriate action. If asking further questions please also post your system diagnostics zip file (obtained via Tools->Diagnostics) so we can see the current state of your system.

It is only the trial version that requires an internet connection. The paid licenses do not and can start up just fine without needing a connection.

There is a write-up on Unraid parity Here

That question does not really make sense if Unraid is not exposed to the Internet it does not matter what ports are used and in any case the ports will vary according to the services that you are running on Unraid. If you are doing port forwarding through your router then one assumes that you know what the ports you are forwarding are used for.