I've been having some issues with a hard drive that seems to have packed up. The machine would start fine - no problems in post etc - but just wouldn't boot to an OS. The problem appears to be with a drive, so last night I set SpinRite to work its magic, and was presented with this when I checked the progress this morning:

Darn. 151 hours. What's really annoying is that I was in the process of finally sorting out a proper backup system with CrashPlan.

Update: I am informed by the wife, who is at home watching the progress of this recovery operation with interest, that the estimated time remaining has increased to 842 hours. 35 days. That's more than I'd planned on.