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From:   Josef Bacik <josef@toxicpanda.com>
Date:   Sun, 29 May 2022 15:49:26 -0400
Message-ID: <CAEzrpqfd2jPWxUayfqyYRDN25-etc4_jgzcHmZ3LhGkb4e7Tsw@mail.gmail.com>
Subject: Re: Rebuilding 24TB Raid5 array (was btrfs corruption: parent transid
 verify failed + open_ctree failed)
To:     Marc MERLIN <marc@merlins.org>
Cc:     linux-btrfs <linux-btrfs@vger.kernel.org>
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On Sun, May 29, 2022 at 3:42 PM Marc MERLIN <marc@merlins.org> wrote:
>
> On Sun, May 29, 2022 at 02:58:11PM -0400, Josef Bacik wrote:
> > > gargamel:/var/local/src/btrfs-progs-josefbacik# ./btrfs rescue tree-recover /dev/mapper/dshelf1
> > > WARNING: cannot read chunk root, continue anyway
> > > none of our backups was sufficient, scanning for a root
> > > ERROR: Couldn't find a valid root block for 3, we're going to clear it and hope for the best
> > > Tree recover failed
> >
> > Well if anything tree-recover will be rock solid by the end of this.
> > Try again please.  Thanks,
>
> Sorry :(
>
> gargamel:/var/local/src/btrfs-progs-josefbacik# ./btrfs rescue tree-recover /dev/mapper/dshelf1
> WARNING: cannot read chunk root, continue anyway
> none of our backups was sufficient, scanning for a root
> ERROR: Couldn't find a valid root block for 3, we're going to clear it and hope for the best
> Tree recover failed

Lord alright, lets try some debugging.  Thanks,

Josef