[Added syslog post last crash]

Hi,

My Unraid server completely freezes once or twice a day. I suspect its freezing once it completes the parity check. I thought it could be due

Attaching the diagnostics below. Have started the syslog server, will attach the syslogs post the next crash as well.

EDIT: Added thje syslogs post the crash.

tower-diagnostics-20250718-1404.zip

syslog

Edited July 19, 2025Jul 19 by prithwirajp
adding syslogs

Nothing jumps out for now, post the persistent syslog after the next crash.

19 hours ago, JorgeB said:

Nothing jumps out for now, post the persistent syslog after the next crash.

Added the logs. I had set a notification for the Parity check, and I noticed the server crashing not soon after I received the Parity check notification.

Also, not sure if this will help - but when the server crashes, its unreachable via ping/ssh and unresponsive when I connect a monitor and keyboard to it. The keyboard num-lock doesn't toggle on and CTRL+ATL+DEL also doesn't seem to work.

Unfortunately, there's nothing relevant logged, this can also be a hardware issue, one thing you can try is to boot the server in safe mode with all docker containers/VMs disabled, let it run as a basic NAS for a few days, if it still crashes it's likely a hardware problem, if it doesn't start turning on the other services one by one, including the individual docker containers.

Additionally, look in the BIOS for a "Global C-States" or similar setting and disable that to retest, it's been known to be a problem with some boards, with both Intel and AMD CPUs.

On 7/19/2025 at 1:19 PM, JorgeB said:

Unfortunately, there's nothing relevant logged, this can also be a hardware issue, one thing you can try is to boot the server in safe mode with all docker containers/VMs disabled, let it run as a basic NAS for a few days, if it still crashes it's likely a hardware problem, if it doesn't start turning on the other services one by one, including the individual docker containers.

Additionally, look in the BIOS for a "Global C-States" or similar setting and disable that to retest, it's been known to be a problem with some boards, with both Intel and AMD CPUs.

Thanks, I have disabled the C states setting and currently booted it in safe mode and kept the Array as well in stopped state. I will monitor for 24 hours, then switch on the array and incrementally start the services and plugins as you suggested.

To add some more background, I was using Unraid with no parity disk without any issues for a few months. It worked as it should, no lockouts or freezes. I started getting a freeze maybe once or twice a week, and shortly after, one my cheap, old SSDs died. It was a throw-away cheap SSD, that I had just popped in for some extra storage, and since the events were so close by, I just assumed that the system was freezing due to bad disk.

Post this, I rebuilt the OS as per the recovery instructions and added a Parity disk as well. At first it was all fine, and then I started noticing the freezes soon after the parity checks were completed. I setup the notification to closely mark the timestamps, I it seems with 2 hours of the parity check, the system becomes completely unresponsive. The short smart tests on all disks run without any error, and they were all basically brand new.

Will keep the thread updated with my findings.

On 7/19/2025 at 1:19 PM, JorgeB said:

Unfortunately, there's nothing relevant logged, this can also be a hardware issue, one thing you can try is to boot the server in safe mode with all docker containers/VMs disabled, let it run as a basic NAS for a few days, if it still crashes it's likely a hardware problem, if it doesn't start turning on the other services one by one, including the individual docker containers.

Additionally, look in the BIOS for a "Global C-States" or similar setting and disable that to retest, it's been known to be a problem with some boards, with both Intel and AMD CPUs.

Ok, I did some testing and the server runs as a NAS without any issues, I ran it for 3+ days without a single freeze. But when I tried to start the Docker apps, it freezes after 24-25 hour mark. Regardless of what app I start, it will freeze the server in a days time. I tried with different apps per day, and same result. Thinking of doing a fresh install over the weekend.

Any suggestions welcome.

Before trying a fresh install, it may be worth trying to recreate the docker image:

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