From: Jes Sorensen <Jes.Sorensen@redhat.com>
To: Dominique <dcouot@hotmail.com>
Cc: linux-raid mailing list <linux-raid@vger.kernel.org>
Subject: Re: Ubuntu mdadm Raid and EFI
Date: Mon, 28 Nov 2011 10:44:20 +0100 [thread overview]
Message-ID: <4ED357F4.3050605@redhat.com> (raw)
In-Reply-To: <BLU0-SMTP1700793E8A96042A5B235CDC9CE0@phx.gbl>
On 11/24/11 17:11, Dominique wrote:
> Ok, nothing like writing a mail to get intuition for the next steps..
>
> First I simplified the initial setup.
> RAID1 for everyone, and only two HDD to start. I'll convert and expand
> at a later stage.
> I also added an EFI partition ('bootgrup' if I remember well). I did
> that on both disk.
> Reboot and voila, it boots.
>
> But this kind of negates the RAID1 /boot logic. If the first disk fail,
> then what ? No EFI, no boot ?
> How - if possible - do you configure EFI to boot from RAID1 across xHDD
> to allow boot in degraded mode ?
Depends on how you create your raid - if you use IMSM raid, you can put
the EFI partition on the raid1 device as well. Given you have a
motherboard with an i5 processor, I would expect it to have support for
IMSM raid.
Check the BIOS settings for the drives - if you flip them from AHCI to
raid mode you ought to be able to do it this way.
Cheers,
Jes
next prev parent reply other threads:[~2011-11-28 9:44 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-11-24 14:09 Ubuntu mdadm Raid and EFI Dominique
2011-11-24 16:11 ` Dominique
2011-11-28 9:44 ` Jes Sorensen [this message]
2011-11-28 14:07 ` John Robinson
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