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What I did hear was a kind of a juddering sound from a cold boot, and then once in a while at a fairly long intervals when the drive is idle. My System is on an SSD, so I suspect that if your using the Seagate as a system drive, you would never hear this juddering sound after you boot up.
Default, parking heads (Unload) occurred at 30s of idle (since the last activity). I've tried Hitachi Feature Tool, but couldn't change APM on the Seagate.