I'm trying to install Ubuntu using RAID 1. In this case I have 2 harddisks with equal size to be used for RAID. I've been able to configure RAID 1 when installing
localhost:~# cat /proc/mdstat
Personalities : [linear] [multipath] [raid0] [raid1] [raid5] [raid4] [raid6] [raid10]
md0 : active raid1 sda1[0] sdb1[2](F)
24418688 blocks [2/1] [U_]
md1 : active raid1 sda2[0] sdb2[1]
24418688 blocks [2/2] [UU]
/dev/md0
is mounted in /
and /dev/md1
mounted in /home
, but the problem is when I plugged off one harddisk, I can't boot my Ubuntu anymore. I think the problem is because the boot loader is installed in the harddisk (in my case in /dev/sda
) and not on the RAID device /dev/md0
.
Correct me if I'm wrong, but when when I plugged off the harddisk that has the bootloader, the OS can't boot. So how do I make my Ubuntu use the RAID 1 system so it can still boot in case one of the harddisks is plugged off?
I'm using Ubuntu 12.04 alternate.