This is the second time all my docker apps have disappeared in the last year.

• I was in the process of changing SMB settings in Unraid (enabling "hide "dot" files") so I was forced to restart the array.

• The first time I tried to restart the array I got the usual error saying "Unmountable: Unsupported or no file system" on some of the drives. This has occurred before and I have never found a solution to it other than attempting to restart the array a couple of times. So I did a restart of the array through the GUI.

• After restarting the array all my docker apps were gone:

WTF Unraid...

This is the second time this happened. 😵 Last time was after I upgraded from 7.0.1 to 7.0.2. I had to restore everything and spend two days on configuring it correctly.

I have attached the diagnostics.

• Then I try to restart my server with the reboot option.

• I wait for 8 minutes for the server to restart. Nothing happens.

• When I try to SSH I can't get access.

• KVM is a black screen but the power icon indicates the server is on.

• I do an unclean power down on the KVM.

• I then start the server again in Unraid OS mode.

• I start the array with no issues (for once).

• I go to the docker tab and the same error "No docker containers installed".

I know I can re-install all the docker apps but to what end? I did that previously and here we are again. This is probably going to continue happening. What should I do?

nova-diagnostics-20250607-0933.zip

Some pools showing up as unmountable is related to encryption, they are not being correctly detected sometimes, suggest updating to 7.1 and retesting, if it still happens you should create a bug report.

Regarding the missing containers, it's using a new docker image, it was created when the pool that had it didn't mount, when all the pools are mounting again, delete them all and recreate:

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

Thanks @JorgeB

As you said, cache and delta failed mounting earlier today. Since the cache disk holds the docker image the system could not find it and must have made a new docker image. But where?

For future readers here is the process I did:

• I deleted the docker image at /mnt/user/system/docker/docker.img

• I started the array. The system could not mount disk 1 and downloads so I tried to start the array again. This time all disks mounted successfully.

• Now I see that the locations of appdata-share, the system-share and the vm-share is suddenly on a different disk, probably because the cache disk failed to mount previously.

• I changed the location of these shares from downloads to cache in the share settings.

• I see that I still have a 161 GB docker.img file in /mnt/downloads/system/docker). So I make a backup of it —just in case.

• I also have a 161 GB docker.img file in /mnt/cache/system/docker/ So I make a backup of it —just in case.

• Then I add /mnt/cache/system/docker/docker.img to the "Docker vDisk location".

• I delete the appdata, system and vm in the downloads pool.

• I enabled the Docker service again.

• I go to the Docker-tab and all my dockers are back again 😃👍

I really wish Unraid would not automatically make system shares at random disks whenever it cannot find the cache.

I really need to find out why mounting fails so frequently.

The disks are completely random, almost never the same. I even tried to remove some of them but the problem remained. By the way, my encryption password is approximately 40 characters long. Is this a problem?

19 hours ago, Bob-omb said:

I really need to find out why mounting fails so frequently.

The pools not mounting was related to encryption, if you didn't reboot yet since disk1 and downloads didn't mount, please post them, but like mentioned, I would recommend upgrading to 7.1.x and retesting, since there were some changes that may help and 7.0 is no longer being developed.

On 6/8/2025 at 10:47 AM, JorgeB said:

The pools not mounting was related to encryption

I have updated to 7.1.3 and I still have problems with disks not mounting. Why are you so certain this is related to encryption?

https://forums.unraid.net/topic/191168-713-unmountable-wrong-file-system-when-starting-the-array/#findComment-1561231