From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-qg0-f44.google.com ([209.85.192.44]:62997 "EHLO mail-qg0-f44.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1161558AbaJaCl3 (ORCPT ); Thu, 30 Oct 2014 22:41:29 -0400 Received: by mail-qg0-f44.google.com with SMTP id q107so4971580qgd.17 for ; Thu, 30 Oct 2014 19:41:28 -0700 (PDT) MIME-Version: 1.0 In-Reply-To: References: Date: Thu, 30 Oct 2014 22:41:28 -0400 Message-ID: Subject: Re: filesystem corruption From: Rich Freeman To: Tobias Holst Cc: "linux-btrfs@vger.kernel.org" Content-Type: text/plain; charset=UTF-8 Sender: linux-btrfs-owner@vger.kernel.org List-ID: On Thu, Oct 30, 2014 at 9:02 PM, Tobias Holst wrote: > Addition: > I found some posts here about a general file system corruption in 3.17 > and 3.17.1 - is this the cause? > Additionally I am using ro-snapshots - maybe this is the cause, too? > > Anyway: Can I fix that or do I have to reinstall? Haven't touched the > filesystem, just did a scrub (found 0 errors). > Yup - ro-snapshots is a big problem in 3.17. You can probably recover now by: 1. Update your kernel to 3.17.2 - that takes care of all the big known 3.16/17 issues in general. 2. Run btrfs check using btrfs-tools 3.17. That can clean up the broken snapshots in your filesystem. That is fairly likely to get your filesystem working normally again. It worked for me. I was getting some balance issues when trying to add another device and I'm not sure if 3.17.2 totally fixed that - I ended up cancelling the balance and it will be a while before I have to balance this particular filesystem again, so I'll just hold off and hope things stabilize. -- Rich