Thanks for the reply. I stumbled on the answer by luck soon after my post. In my case, the md0 raid1 /boot device was newer and had been set to partition type fd "Linux raid auto detect".... [by welbo]
on 06/13/2012 – Made popular on 06/13/2012
I setup a RAID5 (md1) and a RAID1 (md2) using the Ubuntu install image. During setup I said to put /boot on the smaller RAID1. I put "/ "on the RAID5. My boss told to put the \boot and other low activity folders on the RAID1 and put /usr and /var on the RAID5. Did I do this or do I have duplicate boot directories on each RAID?
I currently have openSuse 11.0 installed on a software dmraid raid5 volume. Today I tried to install openSuse 11.2 instead, but I got stuck in the partitioning. I have a /home partition which is also a software dmraid raid5 volume and I want this partition to be left untouched.
When in YaST/System/Partitioner I try to create RAID for my second HDD which is named "sdb".
My original "sda" hdd is partitioned as follows:
dev/sda, disk type
dev/sda1, linux swap, swap, swap
dev/sda2, linux native, ext3, /
dev/sda3, linux native, ext3, /home
I lost the ext3 File system after resizing the Partition on an md raid device. The whole story:
I added an SSD and freshly installed Centos 6. The Raid devices for the former / and swap had to be deleted and the Data Partition should receive the entier disc capacity. I started with two hard disks, having three partitions type fd and three raid1 devices.
According to this section of the GRUB2 wiki-article, it seems I don't need the 2 MiB partition in the beginning when using UEFI + BIOS. However I've tried this and didn't really change anything, same error message ("BootDevice not found").This partition is also not required if the system is UEFI based, as no embedding of bootsectors takes place in that case.