Solution: See
http://www.ibm.com/developerworks/linux/library/l-gpt/ http://grub.enbug.org/BIOS_Boot_Partition I had to completely repartition the disk: Zero both disks, repeat the installation procedure as describe above, but create an additional small (128kb ... 1 MB) first and unused (!) partition on both disks. Then from the command line use parted to set the bios_grub flag as described under http://grub.enbug.org/BIOS_Boot_Partition for both disks: $ sudo parted /dev/sda set <partition_number> bios_grub on Then grub 2 can be installed as usually (and puts itself into this unused partition) -- 10.04 alternate install creates unbootable system https://bugs.launchpad.net/bugs/580851 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs