It’s half a Petabyte (that’s half a million Gigabytes) in a 3U (17” X 5” X 25”) rack mount storage array. Because it uses flash memory - the same kind of memory used in USB thumbdrives – it’s very fast at about 50X the performance of hard disks. It’s low power as well consuming 80% less power than rotating media.
You won't likely be using one of these in your server rack at home - the cost of the array is about $1M – but that’s only $2/Gig which is actually pretty cheap for the speed and performance. (It's less than $1/Gig using the included compression and de-duplication software.)
Here's a link to a short promo video (which also includes some flash.):
Their target market is big data rather than transaction processing systems.
Seems like only yesterday when a Terabyte of storage cost this much...