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Date:   Mon, 4 Apr 2022 14:29:51 -0700
From:   Marc MERLIN <marc@merlins.org>
To:     Josef Bacik <josef@toxicpanda.com>
Cc:     Andrei Borzenkov <arvidjaar@gmail.com>,
        Zygo Blaxell <ce3g8jdj@umail.furryterror.org>,
        "linux-btrfs@vger.kernel.org" <linux-btrfs@vger.kernel.org>,
        Chris Murphy <lists@colorremedies.com>,
        Qu Wenruo <quwenruo.btrfs@gmx.com>
Subject: Re: Rebuilding 24TB Raid5 array (was btrfs corruption: parent
 transid verify failed + open_ctree failed)
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On Mon, Apr 04, 2022 at 05:04:52PM -0400, Josef Bacik wrote:
> On Mon, Apr 4, 2022 at 4:33 PM Marc MERLIN <marc@merlins.org> wrote:
> >
> > On Mon, Apr 04, 2022 at 03:52:15PM -0400, Josef Bacik wrote:
> > > Can you build a recent btrfs-progs from git?  We chucked that error
> > > apparently and I can't figure out where it's complaining.  Thanks,
> >
> > Sure, here's git master
> >
> 
> Alright we've entered the "Josef throws code at the problem" portion
> of the event.
 
thanks :)

> git clone https://github.com/josefbacik/btrfs-progs.git
> git checkout for-marc
> <build>
> re-run fsck
> 
> I wonder if the tree root is fucked and that's why it's not finding
> the device tree.  Thanks,

gargamel:/var/local/src/btrfs-progs-josefbacik# git remote -v
origin	https://github.com/josefbacik/btrfs-progs.git (fetch)
origin	https://github.com/josefbacik/btrfs-progs.git (push)
gargamel:/var/local/src/btrfs-progs-josefbacik# git branch
* for-marc
  master
gargamel:/var/local/src/btrfs-progs-josefbacik# ./btrfs --version
btrfs-progs v5.16.2 
gargamel:/var/local/src/btrfs-progs-josefbacik# ./btrfs check --init-extent-tree  /dev/mapper/dshelf1a
WARNING:

	Do not use --repair unless you are advised to do so by a developer
	or an experienced user, and then only after having accepted that no
	fsck can successfully repair all types of filesystem corruption. Eg.
	some software or hardware bugs can fatally damage a volume.
	The operation will start in 10 seconds.
	Use Ctrl-C to stop it.
10 9 8 7 6 5 4 3 2 1
Starting repair.
Opening filesystem to check...
parent transid verify failed on 22216704 wanted 1600938 found 1602177
parent transid verify failed on 22216704 wanted 1600938 found 1602177
parent transid verify failed on 22216704 wanted 1600938 found 1602177
Ignoring transid failure
parent transid verify failed on 13577821667328 wanted 1602089 found 1602242
parent transid verify failed on 13577821667328 wanted 1602089 found 1602242
parent transid verify failed on 13577821667328 wanted 1602089 found 1602242
Ignoring transid failure
parent transid verify failed on 13577821667328 wanted 1602089 found 1602242
Ignoring transid failure
parent transid verify failed on 13577821667328 wanted 1602089 found 1602242
Ignoring transid failure
parent transid verify failed on 13577821667328 wanted 1602089 found 1602242
Ignoring transid failure
Couldn't find the last root for 4
Couldn't setup device tree
ERROR: cannot open file system

-- 
"A mouse is a device used to point at the xterm you want to type in" - A.S.R.
 
Home page: http://marc.merlins.org/