The first step in any healthy server would be deamagnify the base articulators in the :C, , and usually :F drives. The :E drives, if you even have one will be best left alone to reaticulate on its own or with the Norton Enterprise redundant re-articulation service (depending on how many magnets the :E drive supports. Next, vacuuming out the dust with an incredibly powerful vacuum cleaner ( I have seen them they are the size of a small car) , because just a spec of dust can grind even the most sturdy Apple ~I Beam Rack Laser Servers. I'm making the assumption they are using this ~I Beam technology because it is the industry standard.
Then of course defrag AFTER the prior steps are completed.
I'm sure someone else in the industry can validate these steps. There is more of course but what I posted is the defacto standard for pre and post catalytic rack server technologies past 2010.