From mboxrd@z Thu Jan  1 00:00:00 1970
From: Thomas Kuther <gimpel@sonnenkinder.org>
Subject: How do I boot a system root on a multidevice BTRFS subvol?
Date: Sat, 14 Mar 2009 21:05:45 +0100
Message-ID: <20090314210545.773b1d89@gimpel.ath.cx>
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Hello,

recently I installed a distribution I want to look at via chroot into a
btrfs subvolume on a multidevice btrfs.

Now I tried to boot this, the kernel command line in GRUB looks as
follows so far:

/kernel-2.6.29-rc7-git3 root=3D/dev/sdb7 rootfstype=3Dbtrfs
rootflags=3Ddevice=3D/dev/sda1,subvol=3Darchroot

This gives "VFS: cannot find sdb7 or bad block", like it would when
trying to mount via fstab without -o device=3Dfoo

The fstab line for / looks like:
/dev/sdb7  /  btrfs  device=3D/dev/sda1,subvol=3Darchroot  1 1

Is this possible already, or am I doing something wrong?

Many thanks in advance!

Thomas

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