This is because sda does not have a filesystem on it. This appears to be because you are using fakeraid, so the data is distributed across the disks instead of on an individual one. You need to install grub to the fake raid drive ( /dev/mapper/isw_cchhadgijj_Volume0 ) rather than an individual drive.
** Changed in: grub-installer (Ubuntu) Status: New => Invalid -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1467158 Title: grub wont intstall in dev/sda To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/grub-installer/+bug/1467158/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs