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To: gentoo-amd64@g.o
From: Edward Middleton <edward@...>
Subject: Re: Root on Raid and LVM - Solved
Date: Thu, 10 Nov 2005 11:14:27 +0900
>Anyway... it was quite cool to realize the 2.6 kernel handles partitioned
>raid, now, and with direct boot-time kernel raid assembly, I could run
>root on raid6 without an initrd/initramfs!
That is pretty cool that you recognize a partitioned raid at boot.

>As I was dreading the
>complexity of an initrd solution, I grabbed the opportunity to avoid it
>and still have a raid-backed root, when I saw it!

The initrd part of setup is easy if you use genkernel.  The only issue I
had was using an out of kernel driver but that can be handled by the
--callback="emerge driver name" and adding the driver to
/usr/share/genkernel/x86_64/modules_load
You will also need to set lvmraid=[raid device] real_root=[lvm device]
on your kernel line in /boot/grub/menu.lst

> So, no root on LVM here!
The reason for lvm root is that you can resize the root partition.  It
is also trivial to setup a secondary rescue root partition in case you
mess up your system.

Edward
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Re: Root on Raid and LVM - Solved
-- Duncan
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Updated Jun 17, 2009

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