Is it possible to control the fan of a USB connected HDD enclosure?

I've got a USB enclosure for five 3.5" drives, but not only is the fan very loud, it also cools idle drives down to under 30°C, which according to data floating around the Internet increases chances for drive failure. Is it possible to turn this fan off and on? Then I could write a script to keep drives in a safe range of temperatures. More details on the enclosure: * 9558U3 from Orico * USB3.0, JBOD * IEC (power) connector