Woop! So as of this week, my main system drive has reached half way to the manufacturer-supplied full life expectancy of a mechanical harddrive!

Yes, 100,000 hours is a very general figure, and a lot of new drives have a much higher MTBF, but it's is an
old drive and it was a geeky milestone for me

This 36Gb Western Digital 10,000 RPM Raptor has served me well for 7 years - and I bought it second hand (from Bioshock)! 36Gb is proving to be somewhat restrictive as a system drive, so I've taken the plunge and will be moving over to an SSD tomorrow.
What's the longest that a harrdrive has lasted for you?