If your active-cooled drives are getting that hot, then something is very wrong with either your ambient room temperature (is it 40°C?) or with your active cooling.
Active cooling in a reasonable-temperature room keeps even 15K drives well under 40°C at full duty (closer to 30°C, really, according to our monitoring data I just looked at, the room is around 20°C). Keeping drives within 15°C of ambient shouldn't be a huge deal (though it can be noisy).
Active cooling in a reasonable-temperature room keeps even 15K drives well under 40°C at full duty (closer to 30°C, really, according to our monitoring data I just looked at, the room is around 20°C). Keeping drives within 15°C of ambient shouldn't be a huge deal (though it can be noisy).