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From: Sergiu Cozma <lssjbrolli@gmail.com>
To: Qu Wenruo <quwenruo.btrfs@gmx.com>
Cc: linux-btrfs@vger.kernel.org
Subject: Re: fix for ERROR: cannot read chunk root
Date: Thu, 7 Nov 2019 09:16:42 +0200
Message-ID: <CAJjG=74LUiRLbJiJ_BwgirqkA=i72t0GfJB0Masgkg0NHY0ozA@mail.gmail.com> (raw)
In-Reply-To: <1e600b1e-f61b-ab7a-85bc-8bd1710c2ea9@gmx.com>

Well nothing to lose now so if you come up with any exotic ideas you
wanna try please let me know, I will keep the partition for the next
couple of days.

Thank you for your time.

On Thu, Nov 7, 2019 at 2:44 AM Qu Wenruo <quwenruo.btrfs@gmx.com> wrote:
>
>
>
> On 2019/11/6 下午11:52, Sergiu Cozma wrote:
> > Hi, thanks for taking the time to help me out with this.
> >
> > The history is kinda bad, I tried to resize the partition but gparted
> > failed saying that the the fs has errors and after throwing some
> > commands found on the internet at it now I'm here :(
>
> Not sure how gparted handle resize, but I guess it should use
> btrfs-progs to do the resize?
>
> >
> > Any chance to recover or rebuild the chunk tree?
>
> I don't think so. Since it's wiped, there is no guarantee that only
> chunk tree is wiped.
>
> THanks,
> Qu
>
>
> >
> >
> > On Wed, Nov 6, 2019, 13:34 Qu Wenruo <quwenruo.btrfs@gmx.com> wrote:
> >>
> >>
> >>
> >> On 2019/11/5 下午11:04, Sergiu Cozma wrote:
> >>> hi, i need some help to recover a btrfs partition
> >>> i use btrfs-progs v5.3.1
> >>>
> >>> btrfs rescue super-recover https://pastebin.com/mGEp6vjV
> >>> btrfs inspect-internal dump-super -a https://pastebin.com/S4WrPQm1
> >>> btrfs inspect-internal dump-tree https://pastebin.com/yX1zUDxa
> >>>
> >>> can't mount the partition with
> >>> BTRFS error (device sdb4): bad tree block start, want 856119312384 have 0
> >>
> >> Something wiped your fs on-disk data.
> >> And the wiped one belongs to one of the most essential tree, chunk tree.
> >>
> >> What's the history of the fs?
> >> It doesn't look like a bug in btrfs, but some external thing wiped it.
> >>
> >> Thanks,
> >> Qu
> >>
> >>> [ 2295.237145] BTRFS error (device sdb4): failed to read chunk root
> >>> [ 2295.301067] BTRFS error (device sdb4): open_ctree failed
> >>>
> >>
>

  reply index

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-11-05 15:04 Sergiu Cozma
2019-11-06 10:48 ` Sergiu Cozma
2019-11-06 11:34 ` Qu Wenruo
2019-11-06 15:52   ` Sergiu Cozma
2019-11-06 16:21     ` Sergiu Cozma
2019-11-06 22:19       ` Sergiu Cozma
2019-11-07  0:44     ` Qu Wenruo
2019-11-07  7:16       ` Sergiu Cozma [this message]
2019-11-10 15:40         ` Sergiu Cozma
2019-11-11  1:46           ` Qu Wenruo

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