This Hard Drive Cooling System does actually work! Some hard drive cooling solutions do not really accomplish much in the way of keeping a hard drive cool. Many have small fans that do next to nothing. The reason why this one does work very well is because of the cross-flow blower fan. This fan pushes enough air across the hard drive to prevent overheating. Overheating is very dangerous for a hard drive and can result in system instability, data loss or worse. It's very important to keep current hard drives cool, especially SCSI hard drives...