https://community.hpe.com/t5/proliant-servers-ml-dl-sl/cooling-fan/m-p/3311095#M31537 Jason,<BR />it depends on the device where the fan is mounted. The fans in my notebook are only running when it does very CPU-bound tasks. The fans in my desktop workstation run all the time. The fans in my disk drive enclosure run all the time, but when one of it fails the other enhances its speed.<BR /><BR />So, what device are you talking about? Mon, 21 Jun 2004 14:08:43 GMT Uwe Zessin 2004-06-21T14:08:43Z https://community.hpe.com/t5/proliant-servers-ml-dl-sl/cooling-fan/m-p/3311094#M31536 Is it normal for the cooling fan to run all the time. Mon, 21 Jun 2004 13:39:56 GMT https://community.hpe.com/t5/proliant-servers-ml-dl-sl/cooling-fan/m-p/3311094#M31536 Jason_327 2004-06-21T13:39:56Z https://community.hpe.com/t5/proliant-servers-ml-dl-sl/cooling-fan/m-p/3311095#M31537 Jason,<BR />it depends on the device where the fan is mounted. The fans in my notebook are only running when it does very CPU-bound tasks. The fans in my desktop workstation run all the time. The fans in my disk drive enclosure run all the time, but when one of it fails the other enhances its speed.<BR /><BR />So, what device are you talking about? Mon, 21 Jun 2004 14:08:43 GMT https://community.hpe.com/t5/proliant-servers-ml-dl-sl/cooling-fan/m-p/3311095#M31537 Uwe Zessin 2004-06-21T14:08:43Z https://community.hpe.com/t5/proliant-servers-ml-dl-sl/cooling-fan/m-p/3311096#M31538 In case of Proliant it depends upon the temerature of the server internal components. So server change the fan speeds that is monitored by the HP Management and health driver. Which is installed when the Proliant support for same server is installed.<BR /><BR />Regards<BR /> Tue, 22 Jun 2004 00:18:29 GMT https://community.hpe.com/t5/proliant-servers-ml-dl-sl/cooling-fan/m-p/3311096#M31538 Prashant (I am Back) 2004-06-22T00:18:29Z