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Date:   Sat, 28 May 2022 15:56:01 -0700
From:   Marc MERLIN <marc@merlins.org>
To:     Josef Bacik <josef@toxicpanda.com>
Cc:     linux-btrfs <linux-btrfs@vger.kernel.org>
Subject: Re: Rebuilding 24TB Raid5 array (was btrfs corruption: parent
 transid verify failed + open_ctree failed)
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On Sat, May 28, 2022 at 04:08:25PM -0400, Josef Bacik wrote:
> Sorry my ability to think isn't doing so great right now.  I've wired
> up the detection stuff, but it won't actually fix anything yet.  I
> want to make sure I've got detection part right before I go messing
> with the file system.  If you can pull and build and then run
> 
> btrfs rescue recover-chunks <device>
> 
> and capture the output that would be great.  Hopefully this shows the
> missing block groups and I can just copy them into place.  Thanks,

gargamel:/var/local/src/btrfs-progs-josefbacik# ./btrfs rescue recover-chunks /dev/mapper/dshelf1
checksum verify failed on 21135360 wanted 0x00000000 found 0x3533f3b5
checksum verify failed on 21135360 wanted 0x00000000 found 0x3533f3b5
checksum verify failed on 21135360 wanted 0x00000000 found 0x3533f3b5
Csum didn't match
ERROR: cannot read chunk root
WTF???
ERROR: open ctree failed, try btrfs rescue tree-recover
Recover chunks tree failed
gargamel:/var/local/src/btrfs-progs-josefbacik# 

So, should I do what it says?

Marc
-- 
"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/                       | PGP 7F55D5F27AAF9D08