> Indeed, black would be the most accurate reading because of its > radiating properties. > Other than geeky value, is there a concrete goal? > I'm mostly interested in inlet temp and outlet temperature, and let the > internals handle themselves.
Well, I assemble my own servers, and I want to make sure I didn't do something stupid airflow-wise that causes one part or another to get hotter than I'd expect. I also want to sanity check software-accessable probes; like I was saying, SMART occasionally returns possible but extremely unlikely values, and being able to caliberate my expectations for that sort of thing would help. > Aside: Interesting recommendation from James Hamilton (Amazon > Infrastructure lead) is to run the inlet around 87F, if your other > infrastructure can handle it. Yup. But I co-lo; I've got what, around 15kw of servers, so as far as I can tell, I'm not really large enough for my own space. Once I get a better office, I'll toy with the idea of a rack or two cooled with outside air and a 'three hours a day for one month out of the year' a/c, in my area, that's about what I'd need to maintain 87F. Of course, I need more infrastructure than just cooling; I don't plan on moving anything important into space I fully manage for some time. -- Luke S. Crawford http://prgmr.com/xen/ - Hosting for the technically adept http://nostarch.com/xen.htm - We don't assume you are stupid. _______________________________________________ Tech mailing list [email protected] https://lists.lopsa.org/cgi-bin/mailman/listinfo/tech This list provided by the League of Professional System Administrators http://lopsa.org/
