Probably a world record for hashing density.

Looks like about 2 Petahash / second or about $500,000 / month at today's difficulty
Really?
Top shelves: 9 x 3 x 2 x 4.5TH = 243TH
Middle shelves: 8 x 3 x 2 x 4.5TH = 216TH
Bottom shelves: 8 x 3 x 2 x 4.5TH = 216TH
Total = 675TH