I had the genius notion that it would be simple to set up my new 2011 MacBook Air to dual-boot Lion and Ubuntu. I started creating a 20GB partition, but somehow in the process, Disk Utility crashed. The Macintosh HD volume then displayed as having 20GB less than it should. Resizing it in Disk Utility only gave errors about "free blocking space", which I assumed resulted from Disk Utility crashing during partitioning.
I said screw it, and backed up my computer on an external HD with Time Machine. I booted up my Air into the "Recovery HD" and wiped the hard drive. Now, I want to resize the "Macintosh HD" volume to its full space, so I can then reinstall Lion on it. However, every time I try to, Disk Utility says something along the lines of "couldn't unmount disk". What am I doing wrong?
Here's what I have available to solve this:
- A 1GB flash drive
- A non-existent CD drive on my MacBook Air
How can I fix this problem? I could do a clean install of Lion, but that wouldn't fix the issue, right?