From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-lf0-f54.google.com ([209.85.215.54]:36689 "EHLO mail-lf0-f54.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751594AbdB0SxT (ORCPT ); Mon, 27 Feb 2017 13:53:19 -0500 Received: by mail-lf0-f54.google.com with SMTP id y193so9118415lfd.3 for ; Mon, 27 Feb 2017 10:51:32 -0800 (PST) Received: from [192.168.1.6] (ppp109-252-90-129.pppoe.spdop.ru. [109.252.90.129]) by smtp.gmail.com with ESMTPSA id u18sm10708228ljd.28.2017.02.27.10.51.30 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 27 Feb 2017 10:51:30 -0800 (PST) To: "linux-btrfs@vger.kernel.org" From: Andrei Borzenkov Subject: "parent transid verify failed" out of blue sky Message-ID: <30195f78-a741-7e51-338d-7b96b7a0fe4a@gmail.com> Date: Mon, 27 Feb 2017 21:51:29 +0300 MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Sender: linux-btrfs-owner@vger.kernel.org List-ID: This is VM under QEMU/KVM running openSUSE Tumbleweed. I boot it infrequently for short time to test something. Last time it installed quite a lot of updates including kernel (I think 4.9.11 was the last version); I do not remember whether I rebooted it after that. Today I booted it to check something, after 10 minutes did "reboot" and was greeted with grub rescue prompt (it is located on btrfs itself and apparently failed to read its modules as well). Any attempt to mount it fails with "parent transid verfy failed". btrfsck --mode=lowmem from current Tumbleweed snapshot runs for half an hour now with never-ending same message. I do not care in disk content really, but I would be interested in trying to recover it under guidance. Also if it may be useful I can provide image or other information. TIA -andrei