Hello everyone,

I'm using a small NUC as a personal server, running Unraid 6.12.13 with the applications Immich, rFlood, and Plex installed. The server has a single array with a 256GB SSD, a 1TB SSD, and a 5TB HDD.

Everything was working perfectly until this past weekend when I started experiencing severe slowdowns, especially when using Immich or Plex. On the dashboard, I notice that one or multiple CPU cores are often at 100% usage, even when I’m not actively using the server. I’ve tried restarting several times and even recreating the array, but nothing has resolved the issue.

In the Docker tab, I frequently see the message: "Please wait... starting up containers," which sometimes stays for hours. When it finally disappears, many containers remain in a stopped state. If I try to start them manually, the Unraid loading icon stays on screen for a long time before eventually failing.

I'm unsure what could be causing this — it could be a disk failure, memory issue, CPU problem, USB drive error, or something else. I’m not sure where to begin or how to troubleshoot each component. I've attached the diagnostics file below. Any help or advice would be greatly appreciated!

Thank you!

servidor-diagnostics-20241030-0853.zip

Nothing obvious in the logs, the process using the most CPU is Tailscale, try booting in safe mode.

19 hours ago, JorgeB said:

Nothing obvious in the logs, the process using the most CPU is Tailscale, try booting in safe mode.

I booted into safe mode, and the system initially operated normally. However, as soon as I started the array, the system slowed down again, even while in safe mode. I then stopped the array, disabled Docker, and started the array once more, which resolved the performance issue. This leads me to believe the issue may lie with Docker or one of its containers.

I came across a forum post suggesting that I could reset Docker by deleting the docker.img file. I followed this advice: I stopped Docker, deleted the docker.img file, and attempted to restart Docker. However, now when I enable Docker in Settings > Docker, the status shows as "Stopped," and on the Docker tab, I receive the message: "Docker service failed to start."

I’m uncertain how to resolve this. Any advice would be appreciated.

43 minutes ago, francispb said:

However, now when I enable Docker in Settings > Docker, the status shows as "Stopped," and on the Docker tab, I receive the message: "Docker service failed to start."

Reboot and try again, if the docker service still doesn't start post new diags.

 

And if recreating the image doesn't help, try starting the containers one by one to see if you can find the culprit.

3 hours ago, JorgeB said:

Reboot and try again, if the docker service still doesn't start post new diags.

 

And if recreating the image doesn't help, try starting the containers one by one to see if you can find the culprit.

 

I rebooted the system twice and waited a long time, but Docker still doesn't start. Here is the diagnostics file.

servidor-diagnostics-20241031-1121.zip

Oct 31 10:14:38 servidor root: touch: cannot touch '/mnt/user/system/docker/docker.img': No medium found

 

System share is set to cache=only, but there's no pool called cache, you need to either create one, or change the share settings.

I don’t have a cache pool, and I never have. In the share settings, I couldn’t find where to change it to use the array instead. Below is a screenshot of the share settings. Thanks in advance for your help!

 

 

Strange the settings for the system share in the diagnostics do not agree with your screenshot.     I suggest changing something and then hitting Apply, then change it back and hit Apply again.

 

Also note that the Split Level setting over-rides any other settings in the case of conflict which can force files to go a specific disk.

I changed several settings, saved, and rebooted, but it didn’t work. I found some posts suggesting the issue might be in the go file, so I modified it, saved, rebooted, and still no success. I decided to stop troubleshooting and reinstall Unraid from scratch on a new flash drive. Since I use only a few apps, it took about two hours to reconfigure everything, which ended up being the quickest solution. Thanks, everyone, for the help!