Comment 3 for bug 543838

Well, my workaround was use the livecd and install mdadm, and configure the array manually on the command line before running the installer. It is far from a perfect install however, because you still have to manually boot into rescue mode after the install and install mdadm again and then mess with grub2 configuration to get things how they need to be. It seems that partman is broken for partitions > 2TB on the alternate install cd, but the routines that the ubiquity uses on the LiveCD works ok. I was going to try it against the latest daily build of the alternate CD to see if they fixed it but the daily builds of the alternate CD seem to be broken for the last couple days. Someone should reassign this bug to partman.