I wonder why they've mirrored the image (the left side is quite clearly the right side flipped--take a look at the machine identifier labels). What's being hidden?
The blue LEDs in the picture you linked to, indicate that the servers are running smoothly. [1] It's possible that some servers were faulty at the time the picture was taken. More likely, it's to make the image look perfect.
I wonder why they've mirrored the image (the left side is quite clearly the right side flipped--take a look at the machine identifier labels). What's being hidden?