Question: Partition issue, couldn't unmount disk (error)
I have a Mac that I put a partition on a few months ago, I now want to reformat. Yet when I go to my Recovery HD on Lion then to Disk Utility and try to format my HDD it gives me an error saying it couldn't unmount disk, the two partitions on the HDD unmount but the HDD does not. So I googled it and read a few soulitions however the most common one creating a bootable drive with the Recovery HD on it dosen't work either. One of the soulitions I saw was installing Linux on a removable drive and formating the drive from their, however that seems inpractical for what I'm trying to accomplish, if anyone has a fix for this it would be greatly apreactited.
MacBook Pro, Mac OS X (10.7.3)