I re-installed my operating system twice but it failed shortly after each install. I tried a different OS and it still failed a few hours after installation. I have just acquired another two hard drives from friends to replace the current set. Unfortunately neither are new but they both have great track records so far and I'll get around to testing either later today (Friday) or this Sunday. If another failure occurs I will close this thread and open a new one when I get money for new hard drives.
I can honestly say that there is a great performance increase from dedicating 12GiB of your RAM (I have 16 total) as a container for a VM's main drive (I watched a VM install server 2008r2 in a few minutes several times, it beats waiting). This only gives great random access time in Virtualbox (I usually use Virtualbox, occasionally VMWare) and not throughput increase because it is a virtual SATA drive and is limited to SATA 2.0 (300MB/s) speeds inside the VM. Because of this I assume that RAID 0 would only give throughput increase until SATA 2.0 bottlenecks the VM's disk throughput. Of course nearing 300MB/s (as measured by Sandra) isn't slow, it's several times faster than my hard drives can go since they tend to top out around 60MB/s. If I remember correctly Sandra gave me about 0.11 ms random access time.
If Oracle isn't already working on virtual SATA 3.0 I will give a hint. Or better yet any virtual interface that would outpace SATA 3.0, maybe virtual 8Gb fiber channel or something like that.