Hi again, I just read a previous post. You use a GPT inside the RAID-device. But grub looks for partition tables at a place where is none, because the partition table is inside a RAID-device. You should use metadata version 1.0 instead of 1.2. This metadata is place at the end of the devices like 0.90 was. Then the partition table is at the same position as if the underlying device was not part of a raid. I always use metadata 1.0 for all RAID1 device. The advantage is you always can use it like a normal disk not beeing a part of a raid. Also the grub doesn't need to know that it is part of a RAID. Good luck Lars PS: Sorry for the empty post. -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html