So XLR8YourMac had a very interesting tutorial linked today: http://www.xlr8yourmac.com/tips/Disable_WDGreen_HeadParking.htm ...which basically explains how to disable the automatic head-parking of the WD Green series hard drives. I'm very interested in this personally because I'm using one of the new 4K sector WD15EARS drives in a MiniStack on my home server (FW800 to Mac Mini). With this configuration, the WD drive seems to be parking the heads constantly, as in if I'm not writing data to the drive 100% of the time it "nods off" and takes maybe 3 seconds to spin up and come back online when I try to write to it. Which essentially leads to annoying stalls all the time if I'm periodically saving things. It did the same thing with a previous-gen WD Green 750GB, and I've read complaints elsewhere about the same thing, so I don't think it's a problem with the case. It's apparently an issue with the WD's own power management, where it tries to save power whenever it can, which both results in stalls and doesn't get along well with the MacOS's own power saving routines (the MacOS can sleep external drives, right?). Now, apart from that I absolutely love the drive--it's surprisingly fast, DEAD silent, runs VERY cool, and has a massive 64MB cache. So, I've been hoping for a way to disable this feature. And that's what the article above references. I'm going to try it myself once I have the time to pull the drive out of the server and stick it into a PC (no Mac Pro at home for me, so easier to carry it to work), but I wanted to both give a heads up to others and see if maybe someone else had tried this--curious if it worked (or ate your drive or something). I'll post when I've tried it and tested the results.