From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-ig0-f173.google.com ([209.85.213.173]:34421 "EHLO mail-ig0-f173.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932089AbbKXU3T (ORCPT ); Tue, 24 Nov 2015 15:29:19 -0500 Received: by igvg19 with SMTP id g19so103628651igv.1 for ; Tue, 24 Nov 2015 12:29:18 -0800 (PST) Subject: Re: btrfs check help To: Vincent Olivier , linux-btrfs References: From: Austin S Hemmelgarn Message-ID: <5654C86C.9080800@gmail.com> Date: Tue, 24 Nov 2015 15:28:28 -0500 MIME-Version: 1.0 In-Reply-To: Content-Type: multipart/signed; protocol="application/pkcs7-signature"; micalg=sha-512; boundary="------------ms040907050707040307000809" Sender: linux-btrfs-owner@vger.kernel.org List-ID: This is a cryptographically signed message in MIME format. --------------ms040907050707040307000809 Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: quoted-printable On 2015-11-24 12:06, Vincent Olivier wrote: > Hi, > > Woke up this morning with a kernel panic (for which I do not have detai= ls). Please find below the output for btrfs check. Is this normal ? What = should I do ? Arch Linux 4.2.5. Btrfs-utils 4.3.1. 17x4TB RAID10. You get bonus points for being on a reasonably up-to-date kernel and=20 userspace :) This is actually a pretty tame check result for a filesystem that's been = through kernel panic. I think everything listed here is safe for check=20 to fix, but I would suggest waiting until the devs provide opinions=20 before actually running with --repair. I would also suggest comparing=20 results between the different devices in the FS, if things are=20 drastically different, you may have issues that check can't fix on it's o= wn. > [root@3dcpc5 ~]# btrfs check /dev/sdk > Checking filesystem on /dev/sdk > UUID: 6a742786-070d-4557-9e67-c73b84967bf5 > checking extents > checking free space cache > checking fs roots These next two lines are errors, but I'm not 100% certain if it's safe=20 to have check fix them: > root 5 inode 1341670 errors 400, nbytes wrong > root 11406 inode 1341670 errors 400, nbytes wrong This next one is also an error, and I am fairly certain that it's safe=20 to have check fix as long as the number at the end is not too big. > found 19328809638262 bytes used err is 1 The rest is just reference info > total csum bytes: 18849042724 > total tree bytes: 27389886464 > total fs tree bytes: 4449746944 > total extent tree bytes: 3075457024 > btree space waste bytes: 2880474254 The only other thing I know that's worth mentioning is that if the=20 numbers on these next two lines don't match, you may be missing some=20 writes from right before the crash. > file data blocks allocated: 19430708535296 > referenced 20123773407232 --------------ms040907050707040307000809 Content-Type: application/pkcs7-signature; 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