it seems I am unable to boot from my main boot hd even after volume structure tests which passed and optimize which failed. bottom line here is I would have to back up about 40GB onto cdr before I could wipe the drive and reinstall as there are many things I need on it. is there a way to reinstall it over itself like you used to be able to in os 8 and 9? if its far better to do a reformat I will but only if I really need to. let me know.