From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id DB4E0C433F5 for ; Thu, 30 Dec 2021 21:11:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S242137AbhL3VK1 (ORCPT ); Thu, 30 Dec 2021 16:10:27 -0500 Received: from zmcc-3-mx.zmailcloud.com ([34.200.143.36]:58070 "EHLO zmcc-3-mx.zmailcloud.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S242120AbhL3VK0 (ORCPT ); Thu, 30 Dec 2021 16:10:26 -0500 Received: from zmcc-3.zmailcloud.com (zmcc-3-mta-1.zmailcloud.com [104.154.87.183]) (using TLSv1.2 with cipher ADH-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by zmcc-3-mx.zmailcloud.com (Postfix) with ESMTPS id F1B3040597 for ; Thu, 30 Dec 2021 15:11:09 -0600 (CST) Received: from zmcc-3.zmailcloud.com (localhost [127.0.0.1]) by zmcc-3-mta-1.zmailcloud.com (Postfix) with ESMTPS id 07BA58036FF2 for ; Thu, 30 Dec 2021 15:10:26 -0600 (CST) Received: from localhost (localhost [127.0.0.1]) by zmcc-3-mta-1.zmailcloud.com (Postfix) with ESMTP id ED9DB80343FA for ; Thu, 30 Dec 2021 15:10:25 -0600 (CST) Received: from zmcc-3.zmailcloud.com ([127.0.0.1]) by localhost (zmcc-3-mta-1.zmailcloud.com [127.0.0.1]) (amavisd-new, port 10026) with ESMTP id lVDSrtixFvbE for ; Thu, 30 Dec 2021 15:10:25 -0600 (CST) Received: from epl-dy1-mint (unknown [154.21.21.52]) by zmcc-3-mta-1.zmailcloud.com (Postfix) with ESMTPSA id 9FF378036FF2 for ; Thu, 30 Dec 2021 15:10:25 -0600 (CST) Message-ID: Subject: parent transid verify failed From: Eric Levy To: "linux-btrfs@vger.kernel.org" Date: Thu, 30 Dec 2021 16:10:23 -0500 Content-Type: text/plain; charset="UTF-8" User-Agent: Evolution 3.36.5-0ubuntu1 MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org Hello. I had a simple Btrfs partition, with only one subvolume, about 250 Gb in size. As it began to fill, I added a second volume, live. By the time the size of the file system reached the limit for the first volume, the file system reverted to read only. >From journalctl, the following message has recurred, with the same numeric values: BTRFS error (device sdc1): parent transid verify failed on 867434496 wanted 9212 found 8675 Presently, the file system mounts only as read only. It will not mount in read-write, even with the usebackuproot option. It seems that balance and scrub are not available, either due to read- only mode, or some other reason. Both abort as soon as they begin to run. What is the best next step for recovery?