linux-kernel - Re: Linux mdadm superblock question.

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Date:	Thu, 11 Feb 2010 17:52:41 -0800
From:	Michael Evans <mjevans1983@...il.com>
To:	Justin Piszcz <jpiszcz@...idpixels.com>
Cc:	linux-raid@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: Linux mdadm superblock question.

On Thu, Feb 11, 2010 at 3:00 PM, Justin Piszcz <jpiszcz@...idpixels.com> wrote:
> Hi,
>
> I may be converting a host to ext4 and was curious, is 0.90 still the only
> superblock version for mdadm/raid-1 that you can boot from without having to
> create an initrd/etc?
>
> Are there any benefits to using a superblock > 0.90 for a raid-1 boot volume
> < 2TB?
>
> Justin.
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You need the superblock at the end of the partition:  If you read the
manual that is clearly either version 0.90 OR 1.0 (NOT 1.1 and also
NOT 1.2; those use the same superblock layout but different
locations).
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