Setup: Macbook Air (2011) running Lion with BootCamp (Windows 7).
Problem: I have somehow screwed up my partition table. When I boot I only can select Windows instead of Windows and Lion. However Windows gives a BSOD regardless of safe mode option selected.
My Attempt: I have booted into Lion Recovery and tried running Disk Utility to repair disk volumes but it fails. Also tried to reinstall Lion but unable to because Lion doesn't recognize disk volumes (however it does see that there are two main partitions but they are grayed out).
I have data on both partitions I would like to recover so I am trying to use TestDisk to rebuild the partition table, but when I launch TestDisk from my external thumbdrive I get "Illegal instruction: 4".