What is writing to my boot drive?

[Stux]

Probably why I had to add a heatsink to my boot m.2 after upgrading to scale…

Heatsinks for M.2 NVME drives

So, I have a “Samsung SSD 960 EVO 250GB” as my boot drive in one of my TrueNAS SCALE systems. I’m not sure why, but after upgrading to scale it started reporting as being very hot… 70-80C. I think actually it just started reporting Anyway, I did some searching, and it turns out that this SSD is fairly famous for its controller running hot, and I also checked the datasheet, and it turns out that its operational temperature is not supposed to exceed 70C… and its supposed to have an integ…