6 D5 pumps (with their corresponding heat dump), three Koolance 360 radiators (all three stacked together, so the second rad is getting the first rad's hot exhaust and the third rad is getting the hot air from the first two), twelve (?) hard drives with six hd's each run in series, meaning the coolant gets progressively hotter with each hd, so by the sixth its cooling is probably much reduced from what the first gets.

Lots of tubing and lots of work.....but why? Just because one can do something doesn't mean it should be done.