I scanned the Forum but I did not see anything that talks to the issue of reinstalling a Ubuntu partition using Wubi.
I used Wubi to install a partition on a Windows 7 system under. It worked great until my disk crashed. I had ROS installed on the partition and some other code. The data was recovered into an ubuntu directory in a temporary directory. Under the temporary directory is ubuntu>disks>root.disk which is the size of the partition that I asked Wubi to create. What do I need to do to be able to boot into Windows or into Ubuntu?
If I get it reinstalled, what is the best way to back up the partition. I tried doing a copy of the root.disk file but it was too large to copy onto a USB drive which had plenty of space for the file.