Looks like this was fixed upstream in 1.68 and Xenial has 1.70 so it should now be fixed.
** Changed in: os-prober (Ubuntu) Status: Confirmed => Fix Released -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1374759 Title: >>>WARNING<<< Wrong ufstype may corrupt your filesystem, default is ufstype=old To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/os-prober/+bug/1374759/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs