Arghh!!! - My primary harddisk which contains all my websites, office documents, mail data etc. crashed a couple of hours ago! - It was a 10K RPM WD Raptor (74GB) - However since I do regular backup of all my data, and use SubVersion for all my source code/websites, I havn't lost a single file .. phew! And it only took about 2-3 hours to restore all data from my RAID1 box.
So .. REMEMBER to backup your data - it's not a question of wether your harddrive will fail, only a question when it will happen! - If you're looking for a great backup util. for windows, take a closer look at Corbian Backup