CT: When starting the computer, the following error appears on the screen:
The system has detected that a cooling fan is not operating correctly.
Continued operation is not recommended and may cause unpredictable behavior that could result in random shutdown, data loss or possible system damage. The system will shut down in 15 seconds. To prevent shutdown and continue operation, press the Enter key now.
System Fan (90b)
In addition to this error, the system fan may spin faster and become louder.
This error indicates that a problem exists related to the heat removal system. One of two possible events is occurring:
The system fan is not spinning or not spinning properly.
The temperature inside the case is too high and the fan cannot spin fast enough to remove the heat.
S: http://h10025.www1.hp.com/ewfrf/wc/document?cc=es&lc=es&dlc=es&docname=c03620929 (last access: 29 December 2014)
N: Typically, all heat generated by a computing system must be removed through the building chilled water in order to maintain a safe computer room environment. Due to chiller design
efficiency there is a relation between the increase in water temperature and energy used.
System cooling designs are varied by the way in which the heat is transferred to the water, how the water is distributed, and by the chilled water temperature necessary for heat removal. Data centers want to transfer the heat in to the chilled water in the most efficient way possible, while minimizing cooling power requirements.
S: http://www.cray.com/sites/default/files/resources/whitepaper_ecophlex.pdf (last access: 29 December 2014)
CR: computer science