linux-kernel - Re: Raid 10 Problems?

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Date:	Sun, 4 Mar 2007 19:17:53 -0800 (PST)
From:	Marc Perkel <mperkel@...oo.com>
To:	Jan Engelhardt <jengelh@...ux01.gwdg.de>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: Raid 10 Problems?

--- Jan Engelhardt <jengelh@...ux01.gwdg.de> wrote:

> 
> On Mar 4 2007 15:10, Marc Perkel wrote:
> >> On Mar 4 2007 08:25, Marc Perkel wrote:
> >> >I'm running the latest OpenVZ kernel 2.6.18. I'm
> >> not
> >> >sure if this is a factor or not as the problem
> >> occurs
> >> >without starting any VEs.
> >> >
> >> >I've never used raid 10 before (stripes on top
> of 2
> >> >mirrors) so I don't have anything to compare
> this
> >> >with. I'm just wondering if I'm doing something
> >> wrong.
> >> 
> >> Are you using raid1+0 (3 md devices) or raid10 (1
> >> raid device)?
> >> Depending on which, you might want to try the
> other.
> >
> >
> >I'm using 3 devices. Can you use just one? If so -
> >how?
> >How do I create a raid 10 using mdadm?
> 
> mdadm -C /dev/md0 -N nicearray -b internal -e 1.0 -l
> 10 -n 4 /dev/sd[abcd]1
> 
> for example. (See the manpage for details.)
> 

Thanks - because of your suggestion I had found the
instructions. But you have some interesting options
set. 

-N nicearray -b internal -e 1.0

Are these important? I can restart the process. I
think that I found my original problem. I forgot to
use:

pci=nommconf iommu=soft

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