Re: [PATCH 4/4] Fix upgrade of GRUB with md raid boot for versions F11 and earlier.

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On Mon, Oct 19, 2009 at 17:05:47 -0400,
  Peter Jones <pjones@xxxxxxxxxx> wrote:
> On 10/19/2009 11:54 AM, Radek Vykydal wrote:
> > Up to F11 /dev/mdX in /etc/sysconfig/grub means that grub was installed into
> > mbrs of all /boot md device members' disks. When upgrading grub of such a
> > system, reinstall grub in the mbrs, and update values sysconfig file
> > accordingly (to hold e.g. /dev/sda). Here I'm not completly sure. What if after
> > installation the user reinstalled grub manually - restored mbrs and installed
> > it in /dev/mdX?  He wouldn't be happy with our grub update then...
> 
> This seems okay to me. If the user is smart enough to be fixing things manually,
> they should be fixing them right ;). Also, Why would a user do this? It's not like
> there are BIOSes that understand linux's raid format and boot it.

mdraid 1 partitions are bootable (with the default location of the metadata).
A mirrored /boot partition is something I had for a long time. In that
situation you want grub installed on each of the array disks, so that if
you lose one you can still boot without having to track down a rescue disk
to run grub off of.

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