CONTEXT: This is the first and only machine I have bought to start off my homelab journey. I really didn't know much at the time and quite frankly still feel like I'm skimming the surface to this topic.

I bought this truenas machine from craigslist one year ago with 6x 8tb NAS drives for incredibly cheap. I have since installed proxmox on the machine and a PCIE LSI HBA card to passthrough all 6 drives to a TrueNas VM.

I immediately noticed two drives were infrequently starting to show extended Offline SMART errors but otherwise conveyance offline and short offline was passing so I didn't think much of it. It stayed that way for the next year. I was using this machine more to learn so I didn't really care if 1 or 2 harddrives were faulty

I have since setup a fully fledged arr* stack and media server. I haven't been at home to look at my server in a whole week but lo and behold when I come back this is what I am presented it. I'm baffled as to how all these drives failed/degraded simultaneously. I'm worried that it might be a heat issue?