my Mac pro had been acting up , I had to force shutdown as it stayed on the rolling ball. endlessly. When I re-started it, it could not find the hard drive. Oh gosh, here we go again. Rather than mess it up more, I dropped it off at IRepair after work with Michael the owner. He called me a few hours later to pick it up fixed. Somehow a non moving part a rubber belt (harness) on the hard drive broke! I was so happy to get my computer back in perfect working order and the same day! Can't say enough about these great people! thanks Steve...