Another gotcha I ran into after also reading about it here and other places is the SAS 3.3v power pin issue. This could likely affect you with your SAS drives. I also used the SAS SFF 8087 breakout cables with SATA power input cables. If you do that, you can't use regular daisy-chain SATA power cables. Instead of messing around with pin-masking, I recommend you use a Molex to multiple SATA power adapter like this which simply bypasses the 3.3v power pin to the SATA adapters which let my system boot and SAS drives spin-up. Just make sure your power supply has a Molex power output cable free.