how do i boot when one of the disks in raid 1 / partition fails?

[Fajar Priyanto]

On Wednesday 05 September 2007 15:58:03 Tomoki Taniguchi wrote:
> I have installed feisty 7.04 server
> on a box with 2 identical SATA devices.
>
> i have setup 2 raid1 partitions using mdadm.
>
> / consists of /dev/sda1 and /dev/sdb1
> swap consists of /dev/sda5 and /dev/sda5
>
> the system boots fine.
> and i have also installed grub on both drives mbr so that
> the system can still boot even if the main drive fails.
>
> to test what happens when one of the disks fail,
> i shut down the system.  removed one of the SATA cables and
> started the system up.  But the boot process fails
> because it can't seem to find md0.
>
> how do i get it so that ubuntu continues to boot even if
> one of the drives in the raid1 fails?

Hello,
If you use LVM on the / partition, you will need to separate the /boot dir 
into it's own partition. Also make sure that grub is installed on both hdd. I 
faced a case where Centos5 installer didn't install grub completely on the 
other hdd of raid1. I needed to install grub manually on both hdds to make it 
works.

This is nice URL about raid1 on ubuntu:
http://ubuntuforums.org/showthread.php?p=3304207

HTH,
-- 
Fajar Priyanto | Reg'd Linux User #327841 | Linux tutorial 
http://linux2.arinet.org
09:08:04 up 30 min, 2.6.20-16-generic GNU/Linux 
Let's use OpenOffice. http://www.openoffice.org
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