Munin Exchange approved my plugin recently. I submitted it for approval a few months ago that I already forgot about it. The plugin is written in Bash and it graphs temperatures of HDDs attached to a LSI MegaRaid controller.
It uses the serial numbers of the HDDs as labels:
Most of our servers, circa 2008+, uses LSI cards especially our Supermicro blades. So if you’re using LSI cards as well, check it out.
UPDATE: Munin Exchange is down. They’re moving to github so the links above are not working anymore.
UPDATE: I moved the code to GitHub. Just follow this link.