Re: Warning and BUG using btrfs-vol -b

[Chris Mason <chris.mason@ORACLE.COM>]

On Wed, Oct 07, 2009 at 03:51:46PM +0200, Diego Calleja wrote:
> On Wednesday 07 October 2009 05:17:54 Chris Mason escribi=F3:
>=20
> > Thanks, I'll try to reproduce.  Which raid level did you use for da=
ta?
> > If not raid1, could you try with raid1? ;)
>=20
> I'm not sure, since the utils won't tell. I mkfs'ed and mounted one o=
f the 3.5GB
> files with no special options, and copied some files on it. I mkfs'ed=
 the second
> file, put it in a loop device, and added it to the pool with btrfs-vo=
l -a. Then
> I run btrfs-vol -b and I copied more files and rebalanced several tim=
es.
>=20
> Then I zeroed one of the files used as disks, and tried to read the f=
iles in
> the volume (unsucessfully). Then I rebalanced, and I hit the oops. It=
 seems to
> be very reproducible.

Ok, in this case you ended up with raid0 on the data.  If you:

mkfs.btrfs -d raid1 /dev/loop0 /dev/loop1 you'll get data raid1.

-chris

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