Because I install system using FAI system , I just changed the default settings in /etc/mdadm/mdadm.conf , so mdadm uses metadata version 1.0
after that grub installs correctly and I can boot from the raid1 device
metadata 0.9 also works .
but with metadata 1.1 and 1.2 grub legacy fails .... Didn't check grub2
cat /etc/mdadm/mdadm.conf
# auto-create devices with Debian standard permissions
CREATE owner=root group=disk mode=0660 auto=yes metadata=1.0
I see the same bug on lucid 10.04.3 LTS
Because I install system using FAI system , I just changed the default settings in /etc/mdadm/ mdadm.conf , so mdadm uses metadata version 1.0
after that grub installs correctly and I can boot from the raid1 device
metadata 0.9 also works .
but with metadata 1.1 and 1.2 grub legacy fails .... Didn't check grub2
cat /etc/mdadm/ mdadm.conf
# auto-create devices with Debian standard permissions
CREATE owner=root group=disk mode=0660 auto=yes metadata=1.0