I figured out a pretty big hurdle today in the area over 2TB of data. For some reason (probably because I first tried using fdisk) … my 2998GB (usable) media raid I could not partition correctly. I had planned on using xfs, possibly ext3. At first, I tried fdisk /dev/sdb … but I quickly found that it maxed out ~2TB. After reading up a little more on google … I found that I needed to use parted … or gparted. After a couple of days of toil and searching for reasons that libparted kept failing over 2TB … I found that I needed to rewrite my partition table. This sounds redundant, but I actually needed to REwrite it in a different format. It seemed to have defaulted to an msdos TYPE of partition table. I found an article that told me how to resolve the issue. Essentially, what you have to do is — in gparted you go Device->Create Partition Table->pull down advanced->then select the ‘gpt’ format. Once I did that, life was grand and I could make the raid the full size of 2.72TB instead of the ‘meager’ 2.0TB that it was being limited to. Problem solved … one down .. a few more to go 
