From mboxrd@z Thu Jan  1 00:00:00 1970
From: Chalet16 <chalet16@gmail.com>
Subject: Re: How can I recover data from little overwritten missing raid0 device?
Date: Sun, 17 Oct 2010 22:24:27 +0700
Message-ID: <AANLkTi=SLr_6E=Dwt5SmLp7_b4BGRMka0uXo=8qQp6Kf@mail.gmail.com>
References: <AANLkTinbmFFNySV=_vmWZzQWeLxL3wgBUmsuKch7Mn6j@mail.gmail.com>
Mime-Version: 1.0
Content-Type: text/plain; charset=UTF-8
To: linux-btrfs@vger.kernel.org
Return-path: <linux-btrfs-owner@vger.kernel.org>
In-Reply-To: <AANLkTinbmFFNySV=_vmWZzQWeLxL3wgBUmsuKch7Mn6j@mail.gmail.com>
List-ID: <linux-btrfs.vger.kernel.org>

UPDATE: I'm currently  able to see and read/write some file in degraded=
 mode
but there're many file i can't read with input/output error too.


On Sun, Oct 17, 2010 at 9:57 PM, Chalet16 <chalet16@gmail.com> wrote:
> I had set up btrfs with 2 devices by using command this command seque=
nce.
> "mkfs.btrfs -m raid1 /dev/sda1
> mount /dev/sda1 /mnt/data
> btrfs-vol -a /dev/sdb1 /mnt/data
> btrfs-vol -b /mnt/data"
>
> (I was think that it will do raid1 for both data and metadata but I c=
urrently
> realised that it will do raid1 for metadata but raid0 for data.)
>
> But I forgot that I have mount /dev/sdb1 with TrueCrypt. After I rest=
arted my
> PC and try to mount both devices array again there was a message in d=
mesg said
> "chalet16@server:~$ sudo mount /dev/sda1 /mnt/data
> [ 2828.921406] device label btr2902 devid 1 transid 8829 /dev/mapper/=
truecrypt1
> [ 2828.931780] btrfs: failed to read the system array on dm-1
> [ 2828.961330] btrfs: open_ctree failed"
>
> And when I ran btrfs-show it show that
> "chalet16@server:~$ sudo btrfs-show
> failed to read /dev/sr0
> Label: btr2902 =C2=A0uuid: 5673597c-ff57-4a42-8fe3-ff793f476809
> =C2=A0 =C2=A0 =C2=A0 =C2=A0Total devices 2 FS bytes used 706.75GB
> =C2=A0 =C2=A0 =C2=A0 =C2=A0devid =C2=A0 =C2=A01 size 930.00GB used 71=
7.26GB path /dev/sda1
> =C2=A0 =C2=A0 =C2=A0 =C2=A0*** Some devices missing
> Btrfs Btrfs v0.19"
> And when I run btrfsck on missing device
> "chalet16@server:~$ sudo btrfsck /dev/sde1
> No valid Btrfs found on /dev/sde1"
>
> So I would like to ask for help to recover data from this btrfs raid =
array. In
> my opinion I think that TrueCrypt only overwrite a little location in=
 device
> because I haven't done anything with TrueCrypt device after that.
>
> Thanks
> Chalet16
>
>
> PS. I have recently known that TrueCrypt is in "Forbidden items" list=
 in Fedora
> wiki, but this is not really related to TrueCrypt so please don't ban=
 me because
> I had used TrueCrypt.
>
--
To unsubscribe from this list: send the line "unsubscribe linux-btrfs" =
in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html