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Squid probably had the most relevant reply since he is the author of FCP:

But could you use a wired connection for testing? Might help narrow down problems. And

unRAID will spin down any disks not in use after a specified time. When you first access a spun down disk it may take a few seconds to spin up. Unless you have a specific use that requires AFP it is probably better to use SMB. Do you really mean 2Mb, or do you mean 2MB? There are a number of possible settings for cache usage and some people have gotten in trouble by not understanding them. They are explained in the Help but here is a link with more: https://lime-technology.com/forums/topic/46802-faq-for-unraid-v6/?page=2#comment-537383 Read speed is always at the speed of the single disk. Writing to the parity array will be slower since parity is updated realtime. User shares set to cache-yes will write to cache and be moved to array later so the slower write to the array is postponed, but those cached writes are unprotected unless you have a redundant cache pool. If you want someone to take a look at possible problems with your speeds go to Tools - Diagnostics (preferably after the activity but before reboot) and post the complete zip.

I see you have been a forum member as long as I have, so maybe you installed your dockers a long time ago before the dockerman component was fully developed. When and how did you first install these dockers?

This forum is dedicated to supporting unRAID. I don't know if anyone here can help you or not.

The drive wasn't down, it just had a corrupt filesystem. Even if you removed the disk and tried to access the emulated disk, it would still be a corrupt filesystem, and so unmountable. So, that is the answer to your previous question about whether rebuilding from parity would be a possible fix. It wouldn't.

Do you have this working on unRAID yourself?

Community Applications is definitely compatible. Could you show us what makes you think it isn't? Have you installed any other plugins? Probably the best approach is to start without any plugins, and install Community Applications first, since it will help you install anything else.

Looks like google has led you to a forum where we don't run docker on Windows. This is the unRAID forum. I don't know if anyone here can help you or not.

No. Go to Tools - Diagnostics and post the complete zip in a new thread.

What do you mean by this?

You would have to find the array disk the files/folders are on and move them to cache. Alternatively, you could go to Settings - Docker and stop the service, change the Docker share to cache-prefer, run mover, then restart the service.

Any unused RAM will be I/O buffer for Linux, so any initial burst of speed is going to be due to RAM.

Removing a container never removes the appdata, and nobody would want it to, since that would lose anything they had before when they reinstall. And if you want to reinstall with the same settings, you should go to Community Applications - Previous Apps. That will bring it up with all the same settings as before and no need to point it at the locations again.

For use in unRAID, you should use JBOD mode. This is the unRAID forum. Are you planning to use this controller in unRAID? If you are planning to use it in Windows instead, I don't know if anyone here can help you or not. There are probably other forums more suitable.

Options - Layout.

That's right, I remember now, another tab in Shares. I just never use them myself. I always go to Midnight Commander if I want to work with the disks.

I never use disk shares, but I think if you have them enabled, then any disk you are sharing should have security settings you can get to by clicking on the disk in Main.

You could fix any existing with Docker Safe New Permissions but that wouldn't stop some application from creating new ones. For example, I think settings.json in transmission has a line for umask that affects this.

There is often no reason to have folder/files with other than default owner/permission, since only root has access to the command line, and network (SMB) security settings take care of everything else.

How do you have SMB security for the disk set?

I may have missed this in the thread, but are you sure something isn't streaming? Have you tried Active Streams, File Activity, and Open Files plugins to see what they say?

Been a while since I played with any of this, but everything docker related the unRAID webUI and its plugins do is just commands to the builtin docker engine. That docker engine has everything you need to build dockers. It is documented extensively at the docker website. https://www.docker.com/ Go to the command line and start playing around.

Yeah I just realized that cache-prefer might be exactly what you intend. Many expect that setting to result in files getting moved from cache to the array for some reason. All of those settings aren't easily understood from their one-word specifiers.