[CentOS] adding raid1 to running system

[Matt]

> I have followed the procedure on the Centos page:
>
> http://wiki.centos.org/HowTos/CentOS5ConvertToRAID

Is there a how too for CentOS 4.x?

> My setup is slightly different. I am using two partitions, / and /home.
> I have setup swap as a file, /home/swapfile.
>
> My hard drives are 500Gig sda and sdb.
>
> In modifying the instructions for initializing  sdb I have:
>
> used /dev/md0 for / (sdb1)
> used /dev/md1 for /home (sdb2)
>
> In section 3.6
>
> The line:
> mount /dev/RaidSys/Root /mnt/root.new
>
> was changed to
> mount /dev/md0 /mnt/root.new
>
> Everything seems to go well until I get to section 4.4.1/4.4.2 Install grub.
> The commands for installing grub show success but when I edit the
> /mnt/root.new/boot/grub/menu.lst
> the contents still point to hd0 not hd1.
>
> In section 4.4.4 I am not sure how the following should be changed:
> umount /mnt/boot.new
> mount /dev/md0 /mnt/root.new/boot
>
> The umount is not needed in my case but should the second line be:
> mount /dev/md0 /mnt/root.new
>
> Other info I have found includes creating a /etc/mdadm.conf. This is not
> referred to in the instructions.
>
> Are the changes I have made correct? Am I missing any other changes?
>
> Thanks for any help,
>
> David
>