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365 Main, the chain of datacenters whose San Francisco breakdown brought the Web to its knees this summer, is being put on the block by the private-equity funds which own its real estate. Significantly, it doesn't appear that 365 Main Inc., the company which currently runs the centers, will be involved in operations after the sale. Rockwood Properties, which owns a majority of all but one of 365 Main's datacenters, is looking to sell all or some of the centers, which provide space, power, and cooling for servers. No price is set, but the five centers make $68.7 million a year in operating profit — with $18.6 million of that coming from the troubled San Francisco center alone. Frankly, this sounds like a much better business than any of the Web startups hosted by 365 Main. After the jump, the offering document being circulated by Credit Suisse and Eastdil, Rockwood's bankers.

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