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Date:   Mon, 4 Apr 2022 15:09:35 -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 05:40:14PM -0400, Josef Bacik wrote:
> Ok cool, lets do
> 
> ./btrfs check -r 13577779511296 /dev/mapper/dshelf1a
> ./btrfs check -r 13577821667328 /dev/mapper/dshelf1a
> ./btrfs check -r 13577775284224 /dev/mapper/dshelf1a
> 
> and see what those say, it looks like the tree root is stale and can't
> find the root pointers for anything.  Thanks,

Sure thing, the last one is slightly different (found 1602088)

gargamel:/var/local/src/btrfs-progs-josefbacik# ./btrfs check -r 13577779511296 /dev/mapper/dshelf1a
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 13577779511296 wanted 1602089 found 1602242
parent transid verify failed on 13577779511296 wanted 1602089 found 1602242
parent transid verify failed on 13577779511296 wanted 1602089 found 1602242
Ignoring transid failure
ERROR: root [1 0] level 0 does not match 1

Couldn't read tree root
ERROR: cannot open file system
gargamel:/var/local/src/btrfs-progs-josefbacik# ./btrfs check -r 13577821667328 /dev/mapper/dshelf1a        
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
ERROR: root [1 0] level 0 does not match 1

Couldn't read tree root
ERROR: cannot open file system
gargamel:/var/local/src/btrfs-progs-josefbacik# ./btrfs check -r 13577775284224 /dev/mapper/dshelf1a         
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 13577775284224 wanted 1602089 found 1602088
parent transid verify failed on 13577775284224 wanted 1602089 found 1602242
parent transid verify failed on 13577775284224 wanted 1602089 found 1602242
Ignoring transid failure
ERROR: root [1 0] level 0 does not match 1

Couldn't read tree root
ERROR: cannot open file system

-- 
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