From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from len.romanrm.net ([176.31.121.172]:43719 "EHLO len.romanrm.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757762Ab3DAIML (ORCPT ); Mon, 1 Apr 2013 04:12:11 -0400 Received: from natsu (unknown [IPv6:fd39::1e6f:65ff:fea1:3ea6]) by len.romanrm.net (Postfix) with ESMTPS id 38AD32046C for ; Mon, 1 Apr 2013 08:12:09 +0000 (UTC) Date: Mon, 1 Apr 2013 14:12:07 +0600 From: Roman Mamedov To: linux-btrfs@vger.kernel.org Subject: Re: BTRFS error in __btrfs_inc_extent_ref:1935: Object already exists Message-ID: <20130401141207.533886a2@natsu> In-Reply-To: <20130401043605.2eb250a7@natsu> References: <20130401041540.4b8a4ab3@natsu> <20130401043605.2eb250a7@natsu> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=PGP-SHA1; boundary="Sig_/7dBjxAW1veMdY7fPs8KNqBU"; protocol="application/pgp-signature" Sender: linux-btrfs-owner@vger.kernel.org List-ID: --Sig_/7dBjxAW1veMdY7fPs8KNqBU Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: quoted-printable On Mon, 1 Apr 2013 04:36:05 +0600 Roman Mamedov wrote: > Hello, >=20 > After a reboot the filesystem now does not mount at all, with similar mes= sages. So thinking this was an isolated incident, I foolishly continued setting up scheduled balance on other systems with btrfs that I have. And got into exactly the same situation on another machine!! Trying to balance this with -dusage=3D5, on kernel 3.8.5: Data: total=3D215.01GB, used=3D141.76GB System, DUP: total=3D32.00MB, used=3D32.00KB System: total=3D4.00MB, used=3D0.00 Metadata, DUP: total=3D9.38GB, used=3D1.09GB Same messages, "Object already exists". While I currently left the previously mentioned 2TB FS in an unmounted brok= en state, still waiting for any response from you on how to properly recover f= rom this problem, in this new case I needed to restore the machine as soon as possible. I tried btrfsck --repair, it corrected a lot of errors, but in the end gave= up with a message saying that it can't repair the filesystem; then I did btrfs-zero-log. After this the FS started mounting successfully again. Not sure if I got any data corruption as a result, but this is the root FS and /home, and the machine successfully booted up with no data lost in any = of the apps that were active just before the crash (e.g browser, IM and IRC clients), so probably not. --=20 With respect, Roman --Sig_/7dBjxAW1veMdY7fPs8KNqBU Content-Type: application/pgp-signature; name=signature.asc Content-Disposition: attachment; filename=signature.asc -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iEYEARECAAYFAlFZQVcACgkQTLKSvz+PZwgM+wCfUDOuHFFTUnzyWI/HVQwuWesT BXoAnjaCFcyRHtqEdoJY99UmvaVrsPFd =Gu4J -----END PGP SIGNATURE----- --Sig_/7dBjxAW1veMdY7fPs8KNqBU--