So, I've been trying to move my WD Scorpio Blue 1TB HDD into an optibay (in an early '11 i5 mbp8,1 running Snow Leopard 10.6.8). The HDD fit perfect, but when trying to.. well, do anything with it, Disk Utility fails to partition/erase/repair it, and I tried using a few different terminal commands to force erase and partition it (ended with errors saying things like "couldn't unmount disk," "Input Output error," and "cannot allocate memory"). Tried a few other spare hdd's I had in external cases, but there was no difference. Can't see the hdd's in finder but disk utility at least recognized there was a drive, just couldn't do anything to it. Also tried a samsung 830 ssd I just got - same errors. Checked and both sata ports are sata3 capable, so that shouldn't be the problem.. Having the hdd/ssd in the optibay seemed to make everything slower too, it would take at least a minute before the apple logo appeared on boot, and disk utility would hang when first starting it (sometimes wouldn't STOP hanging). Tried resetting PRAM too. Searched to no avail on this specific problem, so here we are... Any ideas??