My desktop is near my head, and there are 2 hard disks in it.
In front of me are 6 external hard disks.
My two servers are up to my left, and there are 4 hard disks in there.
Behind me is the mediaserver with 1 internal and 3 external hardisks.
Behind me is also the Drobo with 4 hard disks in it.
I am surrounded by 20 hard disks.
One of these hard disks is making a funny noise it shouldn't. I can't tell which one it is.