I have a laptop that I run 2 OSs on, Ubuntu and Chromium. They are on separate hard drives, and I physically swap the drives when I want to change the OS.
Recently I wanted to install Windows 7 instead of Chromium, so I went ahead and began installing Windows. I got to the screen where you select the disk/partition to install to, and I started deleting the old partitions. That's when I realized that I had forgotten to switch the drives, and I was deleting Ubuntu partitions. I only deleted one, it was the smaller partition (~200MB). I think this was the boot partition because now Ubuntu won't boot. How can I get this partition back?