It sounds to me like your drive is about to go or has gone to disk drive heaven. You need to do as the others mention and run disksalv on it. You can install that 9gig drive just fine, but only 4 gigs will shoe up. I recomend you partition it out to 2 4 gig sections and a 1 gig section. use the 1 gig part as your system partition and only put workbench and all related files on it.
