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Re: How to install grub to eg the 16th disk in a system?

From: k2011gen
Subject: Re: How to install grub to eg the 16th disk in a system?
Date: Mon, 17 Jan 2011 20:01:54 -0500

On Mon, 17 Jan 2011 17:40:54 +0000
Roderick Johnstone <address@hidden> wrote:

> Hi
> How can I install grub to say the /dev/sdp device (root partition on
> sdp1) in a server so that that disk could replace a failed one in a
> production system and boot as sda?
> In my setup, disks (including partitions for root and data) are mirrored
> between production and server systems (using rsync) to provide a quick
> swap backup in the event of disk failure on the production system.
> I have a script that fixes up the UUID of disk partitions etc in fstab
> and grub.conf on the mirror as these are different from the production
> system disks, but I don't know how to get grub installed on eg /dev/sdp
> so that I can boot it straight away when the disk is swapped into the
> production system where it will be /dev/sda.
> Currently I have to boot into a rescue mode and use grub-install once
> the disk is swapped in to the production system to be able to get it to
> boot.
> This is grub 0.97 on Fedora 14 x86_64.
> Thanks for any pointers anyone can give.

"IF" it doesn't have to be booted while it's /dev/sdp 
I would briefly plug-in the STBY disk as /dev/sda (with 
it's fstab showing /dev/sda as /) long enough to run grub
on it then return it as /dev/sdp. 

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