drive spindown problem

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http://ubuntuforums.org – Help! I've just upgraded from Ubuntu 12 to Ubuntu 13 and suddenly my drives started spinning down and immediately back up every minute or so! They'll be damaged if this keeps up! I have three drives installed on my system, but two of them are just for storage so I don't usually even mount them! There's no way Ubuntu us actually accessing them. How can I make Ubuntu keep unmounted drives permanently spun down? (Hardware)