Welcome to the deep end
You're not kidding. It's been a week, and I still don't have a stable system. But I'm just trying to narrow down my issues. I ordered 3x 4tb WD Reds, and one drive was DOA off the bat. 1 drive (my parity) seems to work perfectly, and another, disk 1, had read errors during parity sync. I'm not sure if I have to RMA that drive too yet, I'm still working things out. Unraid in general seems to be buggy for me right now. This is my second unraid system, and my first was butter smooth. This one, not so much. The web server frequently crashes, and even trying to restart the process for the webserver sometimes spits out an error (can't recall what it was off the top of my head).
I've even tried unmounting all my drives and start preclearing them... because why not. Everytime I've tried, the system locked up after, I dunno, 20% in to the preclear. It never happens when I'm actually watching the system. I have a feeling it's the sata cables. I'm using those Coboc cables mentioned earlier, only because they were cheap. But they're bulky enough that the rear fan kind of interferes with the cables when plugged into the intel sata controller. so I have a feeling that there might not be a great connection. For what it's worth, I ordered a few of those silverstone slim sata cables, and will see how those work (mighty expensive though at $10 a cable, they should've been included with the DS380, or at least discounted).
I haven't ruled out the possibilty of a bad unraid install yet, I just haven't gotten around to redoing it. I'm currently just stress testing the cpu and memory in ubuntu, because I needed something with a GUI, and it gave me an opportunity to use a virtual disk drive over ipmi.
Also, I should just try the 64 bit version of unraid, since I am using 16gb of memory.