It looks like your disk (sdb) has a number of file systems on it, and from the log it shows that grub failed to install, and there are a number of file system errors. Is it possible for you to retry the install using the entire drive and deleting the bad partitions?
** Changed in: grub-installer (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1213635 Title: Near the end of the reinstallation process, the thing stopped. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/grub-installer/+bug/1213635/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs