On 22/11/2011 22:45, NeilBrown wrote:
On Tue, 22 Nov 2011 22:23:00 +0000 Gavin Whitehead <gavin@xxxxxxxxxxxxxxxxxxxxxxxxxxxx> wrote:I'm not sure if this is a GRUB2 problem or a RAID/MD issue but here goes... I want to set up a machine that will boot two Linux installations using raid 1 partitions and Windows XP on a single partition. I have two identical disks partitioned as follows $ cat /proc/partitions major minor #blocks name 8 0 244198584 sda 8 1 30720000 sda1 8 2 30720000 sda2 8 3 40960000 sda3 8 4 1 sda4 8 5 4194304 sda5 8 6 137601024 sda6 8 16 244198584 sdb 8 17 30720000 sdb1 8 18 30720000 sdb2 8 19 40960000 sdb3 8 20 1 sdb4 8 21 4194304 sdb5 8 22 137601024 sdb6 I installed WinXP first in sda3. I then installed Ubuntu 11.04 from the Alternate CD and created some raid1 devices md0 sda1 sdb1 / md1 sda5 sdb5 swap md2 sda6 sdb6 /home I set the boot flag on sda1 and sdb1. This worked a treat. I could boot in to either Ubuntu 11.04 to WinXP. I tested the RAID1 (power down, unplug a disk, power up, power down, replug the disk, power up, use 'mdadm --add' to rebuild the array). Brilliant. Then I installed Xubuntu 11.10 from the Alternate CD. For this install I created one new raid1 device (md3) and reused md1 and md2 md3 sda2 sdb2 / md1 sda5 sdb5 swap md2 sda6 sdb6 /home I set the boot flag on sda2 and sdb2. After the install had completed and grub2 had built the grub.cfg I only had my new Xubuntu 11.10 in the boot menu. The Xubuntu 11.10 install works perfectly (and I can boot in to Win XP) but I can't boot in to the Ubuntu 11.04 installation. I've re-run 'update-grub' but it doesn't find the other installation. If I run 'sudo mount /dev/md0 /mnt' I can access the Ubuntu 11.04 files. Is my intended configuration (tri-boot with two raid1, partition based, Linux installations and XP on a single parition) unachievable?I would just dive into grub.cfg with an editor and make it work. These wonderful "automatically make a config file for you tools" certainly have a place, but there is a reason that config files are plain text files and that reason is emacs (or possible vim). NeilBrown
Doh. Obvious really, but thanks for suggesting it. I have tried it and it works. Now back to DR testing... Thanks, Gav -- 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
