[GLLUG] Re: Booting / as a RAID device in Ubuntu

[Dennis Kelly]

Ended up fixing it myself with a lot more debugging.  Found I had to
update mdadm.conf manually.  The update-initramfs process scans
mdadm.conf for arrays and automagically adds the devices to the init
filesystem.  All my volumes are raid1 now, booyah!

dpk

On Dec 6, 2007 11:39 AM, Dennis Kelly <dpk at egr.msu.edu> wrote:
> sda3 and sdb3 are raid1 as md3, mounts as /boot
>
> sdb4 is in a raid1 as md4, to be mounted as /.  I rsync'd sda4 to md4,
> trying to boot md4 as /, so then I can add sda4 as part of the raid1.
>
> If I load the kernel using root=/dev/sda4, it will load the kernel and
> mount /dev/md4 as /, as specified in /etc/fstab... no problems.
> root=/dev/md4 fails, so my first thought is to look at initrd, make
> sure raid1 is included... the modules are there, but /dev in the
> initramfs doesn't have md3 or md4, and I think that is my problem.
>
> So my question is how do I add those devices to my initramfs?  I
> checked man pages and Google and didn't find anything appropriate.
>
> Thanks,
> dpk
>