I'm not 100% sure if my Unraid server got restarted last night, but this morning I saw it it was on the state that array wasn't started. Is there any place or ... I can check if that's restarted or not?

Normal syslog starts over after every boot, you can enable the syslog server if it keeps happening, but usually, a server rebooting on its own vs crashing or hanging, it's a hardware or power problem, and most likely there won't be anything relevant logged there.

The uptime is in the upper left corner of the Unraid webUI.

I'm still not sure what happened, that could be start to track. Thanks.

1 minute ago, trurl said:

The uptime is in the upper left corner of the Unraid webUI.

I know about the uptime and I'm sure it restarted 14 hours ago, when it starts moving items from cache to array.

3 minutes ago, MeowMeow said:

I know about the uptime

The uptime starts when the system boots.

13 minutes ago, trurl said:

The uptime starts when the system boots.

Thanks for the help, I know that.

I was just trying to find what caused the system restart during that time. My only guess is something caused system crash around when mover started.

10 minutes ago, MeowMeow said:

I was just trying to find what caused the system restart during that time. My only guess is something caused system crash around when mover started.

As was mentioned you need to get a syslog that proceeds the restart to have any information about what was happening at the time and that can only be achieved if you have the syslog server capturing a persistent syslog at the time of the crash.

10 minutes ago, itimpi said:

As was mentioned you need to get a syslog that proceeds the restart to have any information about what was happening at the time and that can only be achieved if you have the syslog server capturing a persistent syslog at the time of the crash.

I just did enabled it thanks to @JorgeB