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This new 40TB hard drive from Seagate is just the beginning—50TB is coming fast!
(www.techradar.com)
This is a most excellent place for technology news and articles.
I guess the idea is you'd still do that, but have more data in each array. It does raise the risk of losing a lot of data, but that can be mitigated by sensible RAID design and backups. And then you save power for the same amount of storage.