So the power went out & when I tried bringing the array up after it came back, I was doing so from my mobile which offers what basically is the desktop version of the unRAID UI highly zoomed out.

I clicked something by mistake & didn't realize that both of my cache SSDs [1 SSD/pool] got unmounted somehow.

The server had been running for almost 24 hours since this occurred. Now only I realized the mistake when docker services was up but no containers were there.

I did bring the array down & remounted the cache drives & rebooted the server but no luck getting the containers back.

Now I can see all the appdata in the cache drive. Also there is a docker.img present in /mnt/user/system/docker directory but the docker container are lost.

The containers are gone as Cleanup Appdata plugin list all the appdata folders even the once that I have docker containers for.

I have stopped the array for now to avoid further damage.

What could be wrong here? And how should I fix this? Really don't want to spin up everyone container freshly.

One difference I saw was that the docker.img in the cache drive is timestamped to be earlier than the one sitting in HDD in the array.

They are front the same day but differ by multiple hours.

Diagnostics attached!

tower-diagnostics-20250605-0034.zip

If you now have the old appdata, you can just recreate the docker image (delete any current ones first):

https://docs.unraid.net/unraid-os/manual/docker-management/#re-create-the-docker-image-file

Then:

https://docs.unraid.net/unraid-os/manual/docker-management/#re-installing-docker-applications

Also see below if you have any custom docker networks:

https://docs.unraid.net/unraid-os/manual/docker-management/#docker-custom-networks