I was trying to write an iso to a flash drive. I mistakenly thought that all /dev/sda* are flash drives attached to the system. I wasn't sure how to figure out which was which, so I just unplugged my flash drives and overwrote them all. In retrospect.... this was unbelievably dumb.
So I now have a non-booting system (grub-rescue prompt at boot). I do have an eeebuntu iso on a flash, so I can boot into linux off that, but I'm at a loss. I have a windows partition on the first part of the drive, then the Ubuntu install, but GParted is showing a single 500GB unallocated partition.
I would greatly appreciate advice... I have no idea where to start.