by 
maddock
ANSWERS: 1
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Not an answer, but I know for a fact that Google uses Colossal Storage nanodrives, which reduce an entire warehouse of RAIDs into the size of a small office: "Ferroelectric densities of .2 to .5 Petabits = 200 to 500 Terabits sq. in. / 40 Petabits = 40,000 to 100 Petabits = 100,000 Terabits cu.cm. or 200,000 to 500,000 Gigabits sq.in. / 40,000,000 to 100,000,000 Gigabits cu.cm. with symmetrical read / write times of < 160 picoseconds for 100 year non-volatile storage having infinite rewrites. Normally the 1.3 to 5 nanometer molecule can switch at < 160 picoseconds while maintaining non-destructive readout of ferroelectric bistable properties at a 5 nanometer cell size. This is not the end by any means as Tohoku says their target is 4 Petabits a sq. in or 375,000 Terabits cu. cm. using a .4 nanometer cell size." http://colossalstorage.net/
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