From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from len.romanrm.net ([195.154.117.182]:58678 "EHLO len.romanrm.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750708AbcJJSmk (ORCPT ); Mon, 10 Oct 2016 14:42:40 -0400 Date: Mon, 10 Oct 2016 23:42:27 +0500 From: Roman Mamedov To: Martin Dev Cc: linux-btrfs@vger.kernel.org Subject: Re: csum failed during copy/compare Message-ID: <20161010234227.69746d3f@natsu> In-Reply-To: References: MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; boundary="Sig_/W5T5Oi50Cxg4+rRuwjFcqJE"; protocol="application/pgp-signature" Sender: linux-btrfs-owner@vger.kernel.org List-ID: --Sig_/W5T5Oi50Cxg4+rRuwjFcqJE Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: quoted-printable On Mon, 10 Oct 2016 10:44:39 +0100 Martin Dev wrote: > I work for system verification of SSDs and we've recently come up > against an issue with BTRFS on Ubuntu 16.04 > This seems to be a recent change ...well, a change in what?=20 If you really didn't change anything on your machines and the used process, there is no reason for anything to start breaking, other than obvious hardw= are issues from age/etc (likely not what's happening here). So you most likely did change something yourself, and perhaps the change was upgrading OS version, kernel version(!!!), or versions of software in gener= al. As such, the first suggestion would be go through the recent software updat= es history, maybe even restore an OS image you used three months ago (if available) and confirm that the problem doesn't occur there. After that it'= s a process called bisecting, there are tools for that, but likely you don't ev= en need those yet, just carefully note when you got which upgrades, paying highest attention to the kernel version, and note at which point the corruptions start to occur. > as the same process has been used for the last 2 years --=20 With respect, Roman --Sig_/W5T5Oi50Cxg4+rRuwjFcqJE Content-Type: application/pgp-signature Content-Description: OpenPGP digital signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iEYEARECAAYFAlf74RYACgkQTLKSvz+PZwiVngCfa5h+hEufYUB2acLAorf/OyqP KFEAn1zdaONgbdL4p8Ll8R+ixPMmNXnk =RMy0 -----END PGP SIGNATURE----- --Sig_/W5T5Oi50Cxg4+rRuwjFcqJE--