I have an issue with my optibay; I own a macbook pro early 2011, 15". I recently installed a samsung SSD and put it in the hard-drive location. I placed the original Hitachi 500gb 7200rpm HDD in the optibay location. Unfortunately my machine does not recognise the device even though I can feel it spinning. What I did; 1. I put in the SSD in the optibay location, installed mavericks from my "old" OS, which is installed on my HDD. 2. Rebooted my machine and was not able to boot from the SSD > Got a circle with a slash through it at booting. Computer defaulted to the HDD install. Resolved this by moving the SSD to the original HDD location in the computer and putting the HDD in the optibay. I am quite sure the optibay is connected and not broken, since it does recognize my SSD when using my orignal HDD as main disk. Does anyone know how I can have my HDD show up as drive, without placing it back into the original location?