grub install fails on md raid

i am trying to autoinstall sles10 with /boot on an md raid. autoinst profile was generated within yast from an installed system, but it fails to install grub correctly. error message shows that stage2 installation (setup --stage2=/boot/grub/stage2) is tried first for hd(0) , which fails, then it succeeds for hd(1,0) and hd(0,0). even when choosing the proposed ability to reconfigure grub settings and specifically choosing only the two mirrored partitions, it attempts to install also on hd(0). system itself is bootable after this, but the prompt with the message interrupts autoinstallation process. what could be the reason for this problem ? -- Rich