I tested using the spare drive and was able to get through about 24-hrs with no blue screen. I looked on Netgear's site and noticed that I was using driver version 4.0.140 and the latest is version is 4.2.214. I went ahead and upgraded the driver and transferred around 60GB from my file server to the laptop. So far, it's been stable. I'll continue to beat it up for a few days to see if I can get it to crash.
One minor typo to my reply to Darr, the test drive is 160GB, not 180GB...