I attempted to free up some space on the root file system by moving /System/Library/lib to /var/stash/lib and creating a symbolic link back to the original location. It worked fine until I tried rebooting my iPhone. Now when I try to boot in verbose mode, the iPhone gets to the part just before it would normally run fsck on the two partitions, but instead runs through a lot of code too fast to see and then reboots. I'm thinking that if I can access the file system from recovery mode or DFU mode, I can undo the symbolic link and it should boot up fine.

Does anyone know how to access the file system from recovery mode or DFU mode?