This may sound like a simple thing but a while ago I created a windows partition off of my internal hardrive, played around with windows and then deleted it. Now I want to get all that drive space back but there is some formatting problem with the disk. So naturally I attempt a disk utilities repair but it find unfixable errors. Of course, shut down my mac. And attempt to log on using command - s but I get "no bootable disk" as if the computer is trying to start up in the unformatted partition. How do I boot into the mac partition to run fsck -fy?