Comment 5 for bug 1476178

Your primary drive ( /dev/sda ) appears to have been partitioned with an ancient partitioning tool that started the one partition there ( fat16 ) very close to the start of the disk, which does not leave enough room for grub. You either need to repartition it with a modern partitioning tool or choose to install grub to /dev/sdb instead ( and make sure your bios is set to boot that drive ).