On Oct 4, 2005, at 11:59 PM, Jon Warms wrote: > Without any supporting data other than my own experiences, > I hypothesize that within the last two years of an Applecare > contract, something like half the laptop and mini drives will fail. > If this is true, ... Maybe you're just trying to make a point, but this is so far from reality that it begs for a response. HDs commonly have a MTBF of 500,000 to a 1,000,000 hours. Since most people don't know what Mean Time Between Failure really means I'll quote from a Samsung page, "SAMSUNG's MTBF for HDDs is 500,000 hours. That means that if you use your PC for 9 hours every day, your HDD should operate for 152 years." For details see <http://www.samsung.com/Products/ HardDiskDrive/whitepapers/WhitePaper_05.htm>. In the 11 years that I managed 100's of machines that ran 24 hours a day I only had 2 hard drives fail. The vast majority of people will never experience a hard drive failure during their life. Phil