I'd get the maker to support you on this. My friends in the industry do this a lot and they deliver the working system and on demand the setup sketched out on paper.
Why Seagate? Did you read my recent post at http://forums.cnet.com/7723-7588_102-634896/hdd-reliabilty-for-2014-is-out-scary/?tag=contentBody;threadListing
That Seagate 3TB was the worst of the lot. No wonder you wanted RAID 5!
Bob
PS. Nod to Adaptec controllers. They've been at this for years.
Current build specs:
AMD FX8370 CPU
ASUS Sabertooth 990FX R2.0 MOBO
32GB Corsair Vengeance DDR3 1866 RAM
2X240GB Mushkin SSD (RAID 1) OS
3X3TB Seagate 7200 RPM (RAID5) Data
Sapphire R9 290X 8GB GDDR5 Graphics Card
Corsair AX1200i PS
Cooler Master Cosmos II case
I do a lot of "big data" work, that is what this server is for. The crazy GC is because I want to power 4 monitors and keep the refresh rate high (I am staring at these screens 8-10 hours a day). I purchased the massive cosmos II case because I knew I would need to expand the storage on the data drive as the datasets grew larger over time, I am about a month away from needing to add more storage capacity to my data drive array. The limit of the MOBO is 6 total drives in RAID, meaning I have only 1 more slot open for expansion on the MOBO itself. This should buy me another 3-4 weeks at best.
My question to all you fine people, since I feel like I am chasing a purple squirrel, is what RAID controller to get for this server? Ideally, the controller would have at least 8 ports and support RAID5, that being said... All the ones I have found are PCI-e 1-lane interfaces to the MOBO, which would be fine if the GC I have didn't block off that interface. Do I have other options that aren't $700+?

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