The set of pictures posted last week (Google Data Center Tech) is a bit unusual in that they are showing current pictures of current facilities running their latest work. What was published was only pictures without explanatory detail but, as the old cliché says, a picture is worth a thousand words....
The differences are of a varying degree, depending on the hard drive manufacturer - but in summary, most Enterprise-class HDDs have higher tolerance internal parts - designed to meet the needs of high-availability environment, 24/7. Also, higher tolerance for vibration, heat, and the other environmental factors which comes in a server environment. For additional details, please refer to the Intel paper at the end of this article.
I would like to measuring air temperature entering and leaving each rack at the top, middle and bottom (i.e. 6 probes per rack), an additional humidity probe on every 5th rack, and, a temperature and humidity probe at each air return grill in the ceiling. This will be hundreds of probes in total, so I'm interested in a cost-efficient sensor solution.
In the US, every car sold has a standardized EPA rating on fuel economy. Using a quaint measurement system of "miles per gallon", it's not precise, but it does give buyers a rough measure of comparative fuel efficiency.
Existe un estándar llamado ANSI/TIA-942 Telecommunications Infrastructure Standard for Data Centers [...] hay una parte del estándar que vale la pena conocer cuando contratamos servicios de alojamiento en un centro de datos: Los Tiers.