Hi there, Recently I installed a WD Black 2 dual drive in my early 2011 Macbook Pro. I've managed to make a fusion drive out of it, and it's doing everything I expected from it. The only problem is that intermittently, my mac won't boot all the way. It will get stuck at the loading screen you get after the apple logo. I've tried waiting it out (for like 2 hours), but that didn't do anything. I've done all the standard stuff you can think of; resetting pram/nvram, smc, fixing stuff in disk utility, etc. I've also enabled TRIM successfully, in case some of you are wondering. I've booted in Single User Mode and ran the /sbin/fsck -fy command, which gave me the log in the picture. So clearly something is going wrong at the end of the log. Does anybody have a clue what the problem is and what I can do about it? It's hard to pin down for me because it's so inconsistent (it's hard anyway, since I don't have any serious computer training). I'm running a 4 core intel i7 @ 2 GHz, 8 gigs of RAM (1333 mhz I think) and an AMD Radeon HD 6490 265 MB gpu. Thanks for any help in advance!!