Ever since I upgraded, the HDD light has been burning constantly even though the upgrade is complete. Is this normal? The process systemd-journal seems to be active, does that mean that logging all the changes is what's going on?

It's a pitiful Atom system with 2 cores, 2Gb RAM, and a single spinning HDD.

EDIT: Some service got installed that conflicted with pihole. plus I screwed up my sources.list.

Everything was working fine, but I just HAD to update.