Hi Guys, Again, sorry for a new thread but I can't seem to find an answer. After returning a Sandisk SSD and ordering a Crucial one (thanks for the advice!), I'm still confused as to whether it would be ok to place the boot drive (SSD) in the optibay and leave the HDD in place. In my MBP Early '11 13inch, I HAD to put the SSD in the original HDD bay. It's not a huge deal as I've to put in 8GB RAM anyway.....but I'd like to have the Thermal Sensor & fan working as intended, as I kinda like the WD Scorpio Black HDD in it! Thanks!