[Plex Unreachable]

I found this post because I had a similar issue.  I saw that the Lime version of PMS had an update available, so I applied it, and when the docker container restarted, I couldn't get to the Plex UI and I saw the same "user not found" errors in the docker log.  My solution was to use the video referenced above to use the official plex container instead.  Followed the directions in the video and now my server is up and running again, no issues.

[Questions regarding installing PCIe Sata controller and BIOS updates]

In case the card you ordered doesn't work for you, take a look at this one:

https://www.amazon.com/gp/product/B01464550K/ref=oh_aui_search_detailpage?ie=UTF8&psc=1

 

That's the card I use, in two different unRAID machines, both using ASRock motherboards, and I've had 0 issues.  It also has 2 more ports than the one you ordered, and isn't much more expensive.

[UnRAID Server Case Recommendations]

Lian-Li PC-A77, with 4 kit of 5-in-3, this is what I have :

 

https://www.dropbox.com/s/31tbamml69xk6le/server_front.jpg?dl=0

 

https://www.dropbox.com/s/lzkmpbbx5drceqy/server_side.jpg?dl=0

 

That is a fantastic setup, but that case combined with 4 5x3 adapters, and you're looking at well over $500!

[UnRAID Server Case Recommendations]

If you're looking for a tower case, even a pretty large one, you're usually capped at about 15 drives, without getting really creative.  You can get a case that has 9 top-to-bottom 5.25 bays, and fit it with 3 5x3 cages for a total of 15 hot-swap bays.  I have seen a couple of tower cases that can fit 4 5x3 cages (like this one).

 

Otherwise, it's easy to find rack-mount cases on ebay for pretty cheap, with tons of hot-swappable bays, though I can't speak to their cooling abilities, especially if noise is a concern.  You might also look into external eSATA enclosures, and connect one to your current box, if you don't mind the additional footprint.

[Avoid using San Disk Ultra Fit USBs with UNRAID !!!]

I'm using a 16GB Ultra Fit (same exact model limetech uses for their pre-configured flash drives, according to the picture on their purchase page).  I have mine plugged into port 1 of the primary USB 3.0 header, and I haven't had an issue.

[Silent Build: Silverstone DS380 Build [DAEDALUS]]

This thread is very interesting because I'm thinking of building a similar setup.  I really like that Silverstone case.  I have one question though.  The supermicro mobo, as well as a couple other boards suggested, are microATX format.  I thought that Silverstone case only supported miniITX or DTX.  Am I missing something?