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IBM Constructing World’s Largest Data Drive

“At this very moment, researchers at IBM are building the largest data drive ever — a 120 petabyte beast comprised of some 200,000 normal HDDs working in concert.

To put that into perspective, 120 petabytes is the equivalent of 120 million gigabytes, (or enough space to hold about 24 billion, average-sized MP3’s), and significantly more spacious than the 15 petabyte capacity found in the biggest arrays currently in use.

To achieve this, IBM aligned individual drives in horizontal drawers, as in most data centers, but made these spaces even wider, in order to accommodate more disks within smaller confines.

Engineers also implemented a new data backup mechanism, whereby information from dying disks is slowly reproduced on a replacement drive, allowing the system to continue running without any slowdown.

A system called GPFS, meanwhile, spreads stored files over multiple disks, allowing the machine to read or write different parts of a given file at once, while indexing its entire collection at breakneck speeds.”

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