I have build in a optibay in my old black macbook. the SSD i have installed in the old harddisk socket, and my old HDD(fujitsu 250gb 5400rpm) in the new optibay socket. I can't format the HDD to HFS +. i immediately get errors in disk utility: " invalid node structure". This is also the same if i put my SSD in that socket. But the original HDD socket works for both the SSD and the old HDD. I now have the HDD in the optibay and formatted in NTFS which works! but since OSX Lion doesn't support NTFS, the maximum speed i get now is 3mbps, and i have a problem with permissions( I can acces the drive, but my programs can't) Does somebody have experience with this problem? is there a way where i can format the HDD in the optibay to HFS + without any problems? Thanks in advance!