I think prometheus + grafana might be what you are looking for. In combination with loki grafana can also be used for viewing log messages.

I doubt many are looking for 8-bay DAS, anything larger than 4-bay you are probably better off with NAS. Many DAS have limited RAID support, which can make having more drives more risky.

But i already have a computer that works well enough, isnt it a waste to completly replace it with a nas?

Thanks this was a very usefull anwser!!!

I currently use firewalld is their a diffrents in terms of security ?

Thanks for your anwser i will look into your links!!!

I meant firewalld im sorry

Thanks for the time to anwser. What is the diffrents between ufw and systemds firewall ?