On Sep 24, 2012, at 1:28 AM, Günther J. Niederwimmer wrote: > > Model: ATA ST3320620AS (scsi) > Disk /dev/sda: 320GB > Sector size (logical/physical): 512B/512B > Partition Table: gpt_sync_mbr Interesting. Parted thinks this disk has a hybrid MBR. Günther, what is the result from: fdisk -l /dev/sda ? And one more, I'd like to see the result from: mount I want to make sure nothing is directly mounting sda or sdb. > But the good thing from this, Grub2 found my Windows 7 Installation on the > Raid1 and Make a Start Entry, with mdadm this is not working, Grub2 don't > found the windows? Let's do one thing at a time. We don't even really have the basics covered yet. I am not able to reproduce your problem where the kernel and parted complain about the alternate GPT header not being at the end of the disk. I'm using kernel 3.5.3-1.fc17 and mdadm 3.2.5. Chris Murphy-- 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