blacksci :
Well hdd failure isnt really a issue on a laptop to begin with, generally your not read/ writing near as much as a desktop does. And if worse comes to worse send off to the manufacturer to get some recovery cd's. And i dont have a problem with hdd failures, ive only lost 2 in the last 12 yrs, and both of those were ide- so no real loss.
Drive failure in a laptop is more of a risk than in desktops, they get moved a lot more and often while the drive is spinning, causing hardware failures. If someone just sat the laptop in one spot, or never moved it while it was running, then the failure rate would be about the same. Even then, the smaller laptop hard-drives are more of a risk to heat and shock.
If someone had a laptop and a desktop, and used the desktop mainly and a laptop every so often, then you can say that the laptop drive is less likely to fail. With situations where a laptop is used regularly, the drive is more likely to fail than in a desktop. This is why there are so many issues with USB drives and flash drives, they just get tossed around and break.