Working on trying to repair a friend's PC, I've encountered a hard drive so toasted, the file system is unrecognizable. The funny thing is that there's actually no "click of death" coming from the disk, but even a FIXMBR failed to recognize the old school FAT file system ("unrecoverable errors", file names that are all smiley faces (!), and my personal favorite, the reporting of the size as "10,XXX kilobytes" -- ouch!).
So I'm installing a fresh OS on the machine and giving it back as a pristine machine.... sans all saved data, documents, personal information, and settings.
Makes me feel a bit defeated....