I have seen some posts about "fan scripts" for speed control. On the other hand it looks like there are only two effective IPMI fan speed options, 30 RPM. On the plus side I seem to have resolved my disk overheating problem. I went back to Max when temp hit 28'C and temp is trending back down again and seeming stable at 27'C. Temp started at 25'C, went to 26' when I decreased fan speed from Max to lower setting. I started an all disk scrub to stress test system and checked a random disk temp via FreeNAS with: smartctl -a /dev/da0 | grep -i temperature. At the other three settings (standard, optimal and heavy i/o) fan speeds run around 3000 RPM without significant difference in sound or measurements between them. At "Full Speed" fans 1, 2, 3, 5, 6 run at around 6-7000 RPM and sound like a shop vac. I checked fan speeds with Server Health ->Sensor Readings. Fan options are: Standard Speed, Full Speed, Optimal Speed and Heavy I/O. I got IPMI IP address from bios and used browser to log in. I would hate to have to go back to my consumer frankenstein build. Please guide me in the right direction about fan control. I search the forum and found discussions about "scripts" and "IPMI" of which I have no knowledge. I looked through the BIOS menus and found no fan control options. Its my guess that the fans can cool my disks when spun up to speed. Since the system fans currently spin slowly and quietly I want to adjust the speed to increase cooling. I rebooted several times and got similar disk overtemperature warnings. I promptly got disk overheat errors from FreeNAS, even when I replaced the case cover to promote air flow. When I turn on system the 5 big case fans spin up loudly initially and then get rather quiet when Motherboard boots.
dual SSD boot drives inside case powered from extra Molex connector from power distributor. I just "finished" moving my FreeNAS from consumer hardware to the server case. This is my first excursion into using server hardware.
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