CRITICAL: Aug. 18, 2017, 8:03 a.m. - The volume trust state is ONLINE

[Stux]

Nope, just 16 GB gaming RAM, one day I build a top FreeNAS Box :)

For no there isn't a real disk error, right? and if I change for a better cable, this error might not happen anymore, also right?

The error could even have been a memory error. Basically that error happens when the data received by the drive is corrupt. Normally indicates an issue upstream from the HD.