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From: Simon Mcnair <simonmcnair@gmail.com>
To: Paul van der Vlis <paul@vandervlis.nl>
Cc: "linux-raid@vger.kernel.org" <linux-raid@vger.kernel.org>
Subject: Re: Software raid, booting and bios
Date: Fri, 20 May 2011 08:03:15 +0100	[thread overview]
Message-ID: <6123979024523080515@unknownmsgid> (raw)
In-Reply-To: <ir536c$9jv$1@dough.gmane.org>

Please can you further define what you mean by 'it can become a
problem to boot' ?
Generally this is resolved by having a mbr and boot partition on each
of your mirrored drives so that whichever you use to boot has the
pertinent information to boot the kernel and construct the raid array.
If you have raid 5 with 3 disks you'd have a 3 drive mirror partition
on each disk and a raid 5 set across all three too.

I'm not a guru on this and can't provide much knowledge past the
theory and high level ;-)
Simon

On 20 May 2011, at 07:55, Paul van der Vlis <paul@vandervlis.nl> wrote:

> Hello,
>
> I use software raid (mdadm). The main problem for me is that when the
> drive with the MBR fails, it can become a problem to boot.
>
> When the bios would use another drive to boot when the first drive
> failes, this problem would be gone. But I don't know rackservers who do
> that. Do you?
>
> Or is there maybe some kind of fake-raid card what uses mdadm to solve
> this problem?
>
> Another way would be to use e.g. an USB device to boot to solve this
> problem. Any experiences with that?
>
> (hmm, I realize that netboot is an option too).
>
> With regards,
> Paul van der Vlis.
>
>
> --
> http://www.vandervlis.nl
>
> --
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  reply	other threads:[~2011-05-20  7:03 UTC|newest]

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-05-20  6:54 Software raid, booting and bios Paul van der Vlis
2011-05-20  7:03 ` Simon Mcnair [this message]
2011-05-20  7:14   ` Paul van der Vlis
  -- strict thread matches above, loose matches on Subject: below --
2011-05-20  7:19 Simon Mcnair
2011-05-20  8:33 ` Paul van der Vlis
2011-05-20  8:56   ` Roman Mamedov
2011-05-20  9:33     ` Paul van der Vlis
2011-05-20 10:00       ` Simon McNair
2011-05-21 16:43         ` Paul van der Vlis
2011-05-20 12:11       ` Phil Turmel
2011-05-20 13:22         ` Gordon Henderson
2011-05-20 15:53         ` Paul van der Vlis
2011-05-20 19:32           ` Phil Turmel
2011-05-20 21:27             ` Roberto Spadim
2011-05-20 21:52             ` Brad Campbell
2011-05-21  8:19               ` Leslie Rhorer
2011-05-22  6:31                 ` Simon McNair
2011-05-20 10:04   ` CoolCold
2011-05-20 19:13   ` Ed W
2011-05-21 16:58     ` Paul van der Vlis
2011-05-21 19:57       ` Ed W

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