IBM is working on a 120-petabyte storage array that will consist of 200,000 disk drives, according to the MIT Technology Review. The array is expected to store about 1 trillion files. It's being developed for a client that needs a new supercomputer for detailed simulations of real-world phenomena. Storing the metadata about the information in the array -- the names, types and other attributes of the files in the system -- will require about 2 PB. The largest arrays available today are reported to be about 15 PB.
TechNewsWorld