I recently repurposed my home server for my wife to use as a photo editing machine as it was just a wasted beast doing file serving and home automation. I dragged out of the garage my old X58 system to serve as my home server, after blasting all the dead cockroaches out of it I was surprised it started after 3 years of non use and 10+ year old hardware (Props to Gigabyte and Corsair).
After doing some testing for reliability and performance and power consumption, I thought it might save me a few bob till we renovate the house (then I will set up decent servers in my rack dedicated to specific requirements line HO and FS). After loading everything onto it and also creating a Hyper-V VM it has had the odd freeze up, this has led me to the conclusion I am taking a risk with the old hardware even though all data is in Raid and can be shifted to another system if this fails, its still a pain setting up OH2, MySQL, MQTT etc. though.
I have been thinking of just separating the Home automation for the time being onto a separate system and have contemplated using RPi as they are cheap/low power and seem reliable enough.
The filesystem I am not greatly worried about as I have all sensitive data backing up to cloud storage and if it fails I will just get a $3-400 NAS to house the drives till I upgrade to a larger system.
What’s your thoughts, Is an RPi3 a good option, with OpenHab2, MQTT broker, and even for a LEMP stack?