I used GParted to change my flash drive's label to
AdamDrive, so that it mounted to
/media/adam/ADAMDRIVE instead of
/media/adam/980B-F3AC. I re-mounted it and it worked fine. Then I unplugged it, plugged it into my scanner (which has always worked fine for me) and scanned something. But when I plugged it back in, nothing happened, and the computer seemed to acting as though all the USB ports were powered off. I rebooted, and now I can't mount anything other than the normal filesystem. Everything else (three hard drive partitions, one USB hard drive and the flash drive) all show up in GParted, but not in Nautilus. What did I do wrong, and how can I fix it?
Update: The flash drive mounts fine under Windows 7.
Update 2: It works now. I don't know what I did.