text: <s>[INST] Can you reverse the cooling air flow? Summary: Cooling air flow from an enclosure cooler is top to bottom, counter to the drives built in fans I have an enclosure cooler that blows cool air across the top of the enclosure and pulls warm air from the bottom. Don't KNOW why but believe it probably has to do with condensate management in the cooler. Most cold coil cooling equipment uses bottom to top airflow for this reason so I expect enclosure coolers do too. Given that the cooler will be blowing a steady supply of cooling air over the tops of three adjacent drives, I'd like to reverse the fans in the drives to pull that cooling air into the top and blow it out the bottom, where the cooler will draw it back in. The layout in the enclosure is pretty tight so there isn't much room for the two conflicting airflow patterns to coexist. Basically the cooler will be trying to push air down throught he drive heat sinks and the drive fans will be trying to push air UP through the drive heat sink. I might end up with very little airflow. The enclosure is only for the drives (3 E-frame 60 HP drives) and a 12 deep box would be perfect except for the airflow problem. The clear space from the backpan to the door is about 2 more than the depth of the drives. [/INST] Are you having issues with the drive temperatures? The fans blowing air on the drive heat sinks locally won't be affected too much by the overall airflow in the cabinet (unless the two air flows are directly opposing, but it sounds like your cooler is blowing cold air from the side, not down from the top). as long as you are transfering enough BTUs out of the cabinet, you will be fine. the natural tendency for hot air to rise and cold air to sink will not overcome the pressure applied by fans. \\n </s>