So I figured out the reason why the secondary drive in my server would spin back up shortly after stopping it. As I was looking through my dmesg log I noticed an entry where it was enabling the swap space on sdb. Whoops, forgot about that. On the other hand, I also noticed that my SMART monitoring configuration works just fine, as briefly after I successfully spun down the drive I received an “SMART failure” email – it could not detect the drive and perform the self-diagnostic. I have configured my systems to forward the local root email to my personal domain, then to my Blackberry with urgent notification. Glad to see it worked this time!
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