Hey Ya'll! Just registered to this Forum, after reading the forums the last 2 years. I bought this optibay solution on Ebay 2 weeks ago, and have ever since struggled with the spin-up after 1-5minutes. I Have a 2010 Mbp 13" with a Agility 3 in the main bay, and a WD Scorpio black 750 in the optibay. The WD is quite quiet, however when I watch youtube movies and so on the constant noise it makes is kinda disturbing! Well, I just found the solutions. I've tried all the other things mentioned earlier in the forums. 1. disable spotlight on the disk 2. disable writings in the NTFS-program. 3. Set the spindown time to 1 minute 4. eject through terminal. All these worked so so, but the HDD did spin-up after a minute or so.. Until I tried FSeventer, and saw a file called sperion created everytime I heard my disk do a spin-up! I googled it, and it soon became clear it was a copy-protection program installed with some other program. Namely Nalpeiron, found in the services. I started Onyx, set the attribute to show hidden files, checked "library-Startup-" and there it was. So I just deleted the file, and had to shut down the process called "nalpeiron" och i fixed my occasional spin-ups! However, the internet tells me if I delete this program, the program it came with wouldn't be working anymore. I've tried all my programs I use everyday and couldnt find any! So I guess it could be some I've tried long ago... Hope this will help you as well! Kind Regards! Marcus E Sweden ---------- I even have the disk still mounted and it doesn't spin-up until I try to access a file stored on the HDD.. Works like a charm!