I'm trying to build a 16TB RAID system on the ultra-cheap. I don't have any experience with RAID, and basically I just want low-cost, improved performance. So as far as I know, RAID 0 fits the bill. Fault tolerance would be nice but is not necessary.
I know it's unwise in general, but what are the technical problems I might run into if I simply buy 8 random 2TB SATA drives on ebay? These can be had for about $50 each. Is there any reason the models need to be the same, the rotation speed needs to be the same, the SATA interface needs to be the same, the cache needs to be the same, or anything else?