Hello Nicolas   The DRAC/BMC is programmed to run certain fans within certain minimum ranges based on configuration. It also controls fan speeds based on temperature.   With certain configurations the minimum RPM threshold can be increased. It will not reduce fan speed below that threshold no matter what the temperature is.   We have decided not to allow the fan speeds to be adjusted through any interface. We may adjust the thresholds in an iDRAC/BMC update, but at this time we do not allow them to be adjusted. Thanks
Hi, I recently get a R610 with two E5540, 32GB and iDrac 6 enterprise to replace my old server. I upgraded all components firmware so iDrac 6 is v1.95 and all work fine and silently until I add an expansion card (SAS controller). Without PCIe card FANs all run at about 4200 RPM with ambient temp around 20°C but after I added the card, FANs 1A to 6A only jump to 6200 RPM even with ambient temp as low as 15°C ! So I have three questions :  - Why both group of FAN don't run at the same speed ? the low rpm fan prevent air flow implied by the faster fan, in my mind it's a nonsense.  - Why FAN are'nt slowed when ambient temp falls ?  - Why FAN speed is not manageable thru iDrac ?
iDrac 6 fan problem ?