I had a bootcamp partition for windows, but windows crapped out on me and gave some nasty blue screens. I deleted the partition and went to re-create it, but I encountered error messages which prompted me to run disk utility. In disk utility, the repair disk button was greyed out. I ran the verify disk function, but errors that look like THIS occurred. I then started from the OS install disk, but when I try to repair the disk, it tells me that it can't unmount the disk. Any ideas?