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List:       linux-btrfs
Subject:    Re: Root fs on raid1
From:       Goffredo Baroncelli <kreijack () libero ! it>
Date:       2010-11-29 17:57:52
Message-ID: 201011291902.45064.kreijack () libero ! it
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On Monday, 29 November, 2010, you (Erik Jensen) wrote:
> I have a similar setup on one of my computers.  I set it up a while ago
> using an initramfs, but I could not get the device scan to work properly,
> for whatever reason.  I ended up having it just trying to mount every device
> in the array in turn.  When it gets to the last device, the array mounts
> since btrfs now knows about all of the other ones.  Really ugly, I know, but
> it works.
>

I also had a lot of problem to get a btrfs-aware initramfs working properly. 
One of the biggest proble was to find the right list of modules. Btrfs depends 
by crc32c, and I need a lot of retries to discover it.

The main problem was that if the module is not available (it is the case of a 
initramfs) btrfs doesn't start...

When you say " it just trying to mount every device in the array in turn", do 
you mean in the initarmfs ?



> -- Erik Jensen
> 
> On Wed, Nov 17, 2010 at 10:59 PM, Goffredo Baroncelli 
<kreijack@libero.it>wrote:
> 
> > On Thursday, 18 November, 2010, admin@prnet.org wrote:
> > > Hi,
> > >
> > > I have read that for using raid1 btrfs device scan must be run before
> > mounting the fs. How do I proceed if root filesystem is mounted from btrfs
> > ?
> > >
> >
> >
> > See a my previous post
> >
> > http://www.mail-archive.com/linux-btrfs@vger.kernel.org/msg04709.html
> >
> >
> > > Thanks in advance
> > > Bye,
> > > David Arendt
> > >
> > > --
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> >
> >
> > --
> > gpg key@ keyserver.linux.it: Goffredo Baroncelli (ghigo) <
> > kreijack@inwind.it>
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> 


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