The Questions are in my e-mail?!
First of all the answers to your questions:
- All data still accessible
-
cooter ~ # btrfsck /dev/disk/by-label/home1
found 242881646593 bytes used err is 0
total csum bytes: 236710380
total tree bytes: 525582336
total fs tree bytes: 219082752
btree space waste bytes: 99723364
file data blocks allocated: 284825751552
referenced 242200633344
Btrfs v0.19-16-g075587c-dirty
- ofc i did a balance before the mkfs, the raid was running for some weeks now.
My questions again in a short version:
- Is there a way to see if the 2 devices are still running in raid1 mode? The
''btrfs
filesystem show'' doesn''t fit to the old one (like described
before) so it seems
that they are now running in a non raid1 mode.
- Is there a way to get those 2 devices running in raid1 mode again without
creating
a new filesystem, adding the second device, copying data back etc.?
Regards,
Felix
On 07. September 2010 - 20:46, Jérôme Poulin wrote:> Date: Tue, 7 Sep 2010 20:46:19 -0400
> From: Jérôme Poulin <jeromepoulin@gmail.com>
> To: Felix Blanke <felixblanke@gmail.com>
> Cc: "linux-btrfs@vger.kernel.org"
<linux-btrfs@vger.kernel.org>
> Subject: Re: btrfs and raid1 (restore)
>
> Now that we know the facts, what is the problem? Some simple questions
first;
> Is the data still accessible?
> What did the rebalance do?
> Output of btrfsck/dmesg?
> mkfs.vfat does not write much on disk so if the rebalance was also
> made before the mkfs I guess most data is still present.
>
> Sent from my mobile device.
>
> On 2010-09-07, at 18:28, Felix Blanke <felixblanke@gmail.com> wrote:
>
> > Hi,
> >
> > I made a REALLY bad mistake today.
> >
> > I''ve two hdds which are running at raid1 via btrfs. Today I
mistyped a device-node
> > and did a "mkfs.vfat" on one of them.
> >
> > Then I simply did a "btrfs filesystem balance /path/".
"btrfs filesystem show /path/"
> > now looks like this:
> >
> > Label: ''home1'' uuid:
c3c38f32-f176-4479-8c44-e832ea64639f
> > Total devices 2 FS bytes used 226.12GB
> > devid 2 size 465.76GB used 114.38GB path /dev/loop3
> > devid 1 size 465.76GB used 114.39GB path /dev/loop4
> >
> >
> > Before my mistake the "FS bytes used" were all three the
same, now the bottom two are
> > only half of the size. Am I right that those devices didnt run in
raid1 mode anymore?
> > :(
> >
> >
> > Is there a way, without copying back all data from my backup, to get
those 2 running in
> > raid1 mode?
> > Or do I have to make a "mkfs.btrfs -m raid1 -d raid1
/dev/1", "btrfs device add /dev/2" and
> > "btrfs filesystem balance /path/"? :/ That would cost a lot
of time.
> >
> >
> > Thanks for your help!
> >
> >
> > Regards,
> > Felix
> > --
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