All Zip drives make me sick. Each and every one of them. I had a ZIP 100MB, and that was crap ! It too started making weird noise everyonce in a while, then more often, then it ceased to work at all. Then it started working. Even wrote files onto zip disk...then froze up everything in the half way point. I got a replacement, soon enough, it began to do the same thing. Then one day, I left my window open, and the rain killed it. Oh boy I was glad, it was a good reason to get a 20 GB backup drive instead.
I'm sorry, but I think that it's going to die.
EDIT: Spelling :EDIT