And then spend the $20 and get a copy of StableBits DrivePool. The original version of WHS, based off 2003, had disk pooling and duplication, but they took it out. They couldn't get what is now DriveSpace working well enough to release, so they left the feature out. And DriveSpace is not in Essentials. What this does is avoids any RAID BS. I have a mix of drives from 1TB to 4TB in my server, yet important files are all duplicated across multiple physical drives in the server. There's no RAID. There's no need to replace a dead drive with one of the same size. I can even take a drive out and attach it to any other computer that can read NTFS and read the files from it - I do not need the DrivePool software to do this. Way more versatile than things like Drobo. I moved from my old server by building the new one with one new large drive, copied the first old drive, then reformatted said old drive and added it to the pool. THen went to the next drive - until I had all my old stuff copied over.
That's probably my next move, 2016 Essentials and DrivePool, it's the only logical upgrade from what I have now. Hmm, I do have this 32GB of RAM sitting around that I got super cheap. It's a notch slower than what's in my current desktop or I'd swap the 16GB I have for 32GB. And the server I have now, the MB is actually limited to 8GB max. Though I have another MB for the same gen processor which actually has MORE SATA ports, but it maxes out at 16GB.