[The Merc turned to Revolution 200T from Copan Systems. It employs a radically different approach: a massive array of idle disks, or Maid. In the setup, a disk only spins when a piece of data that resides on it is requested; the rest of the time, it's idle. Because the disks are idle most of the time, there's less chance they'll fail.] I've implemented an architecture with ATA drives that spins them down when not in use, ... The access isn't real time, but it's backup data, so a 15-second delay is no problem.
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