[CentOS] adding raid1 to running system

Robert Heller heller at deepsoft.com
Mon Jan 24 21:08:05 UTC 2011


At Mon, 24 Jan 2011 14:53:45 -0600 CentOS mailing list <centos at centos.org> wrote:

> 
> > I have followed the procedure on the Centos page:
> >
> > http://wiki.centos.org/HowTos/CentOS5ConvertToRAID
> 
> Is there a how too for CentOS 4.x?

It shouldn't be much different than the 5.x howto.

> 
> > 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
> >
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>                                                                                        

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Robert Heller             -- 978-544-6933 / heller at deepsoft.com
Deepwoods Software        -- http://www.deepsoft.com/
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