>> Does this amount of storage actually exist somewhere? (E.g., what kind
>> of space does somebody like Google or Amazon have?)
> 
> Well, I have 2 terabytes at home and AFAIK that's not uncommon these
> days. Thinking from there, I think Google or Amazon really does have at
> least exabytes.

Yes, 1 or 2 TB HDs are on sale if you have the cash.

Note that before you get to exabytes you must first pass through 
petabytes - we're talking about *two* scale units, not just one.

Given that a single drive can hold 1 TB, it's not infeasible that 
somebody could amass 1,000 of those in a data-center somewhere. That 
would give you 1 PB. But 1 EB? Is that really possible yet?

-- 
http://blog.orphi.me.uk/
http://www.zazzle.com/MathematicalOrchid*

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