From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from lists.gentoo.org (pigeon.gentoo.org [208.92.234.80]) by finch.gentoo.org (Postfix) with ESMTP id 7DF28139B2A for ; Fri, 18 Sep 2015 18:20:27 +0000 (UTC) Received: from pigeon.gentoo.org (localhost [127.0.0.1]) by pigeon.gentoo.org (Postfix) with SMTP id 3146E21C0AA; Fri, 18 Sep 2015 18:20:15 +0000 (UTC) Received: from mail-wi0-f175.google.com (mail-wi0-f175.google.com [209.85.212.175]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by pigeon.gentoo.org (Postfix) with ESMTPS id 0827B21C081 for ; Fri, 18 Sep 2015 18:20:13 +0000 (UTC) Received: by wicgb1 with SMTP id gb1so43047350wic.1 for ; Fri, 18 Sep 2015 11:20:12 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=from:reply-to:to:subject:date:user-agent:references:in-reply-to :mime-version:content-type:content-transfer-encoding:message-id; bh=hjxk9oreTaKWskA/G/4/F0nRPxg24swj5Fvj9jol27k=; b=qsYvRCA2asBWYCwxzB9/MURPvnT88NDkPlUMmD+Fy9+p+vEBrDYS6ZvwSUaVD81e10 /GrDtbwyqBhacXWCeyHkUgE70Y+85ZLOArch3x03RDNoOFiqTEsvPfwJbzYF/1OywiiB 1tal0TlIOviDbcQ/z0s2xI8siCRBI4hyJKLpdk3skdGMhx+ErUY6Bywud58E/hKS56cO g3gwJhVg5lAgC7PuiFjdJmmmDzkoFxbPZUJsubUnURAj4uZp6FUR5jc/AnLl91GGdN/R eKI/4I6Yz1rzN7N5gU8S70lfnTEZELXjQr9p91EHIOcFZqLHMPjh4zm4rJ4VD6ApP/Ve y2Ow== X-Received: by 10.180.84.196 with SMTP id b4mr41131483wiz.32.1442600412691; Fri, 18 Sep 2015 11:20:12 -0700 (PDT) Received: from dell_xps.localnet (230.3.169.217.in-addr.arpa. [217.169.3.230]) by smtp.gmail.com with ESMTPSA id p20sm16799612wie.5.2015.09.18.11.20.11 for (version=TLS1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Fri, 18 Sep 2015 11:20:11 -0700 (PDT) From: Mick To: gentoo-user@lists.gentoo.org Subject: Re: [gentoo-user] BTRFS problem? [WAS Quick check on net-print/hplip-3.14.10] Date: Fri, 18 Sep 2015 19:19:44 +0100 User-Agent: KMail/1.13.7 (Linux/4.0.5-gentoo; KDE/4.14.8; x86_64; ; ) References: <201509162222.40567.michaelkintzios@gmail.com> <201509181857.00834.michaelkintzios@gmail.com> In-Reply-To: Precedence: bulk List-Post: List-Help: List-Unsubscribe: List-Subscribe: List-Id: Gentoo Linux mail X-BeenThere: gentoo-user@lists.gentoo.org Reply-to: gentoo-user@lists.gentoo.org MIME-Version: 1.0 Content-Type: multipart/signed; boundary="nextPart80148193.qI7GcQnruz"; protocol="application/pgp-signature"; micalg=pgp-sha256 Content-Transfer-Encoding: 7bit Message-Id: <201509181920.08912.michaelkintzios@gmail.com> X-Archives-Salt: 10356e03-fc1f-4a30-831e-b96248d16a04 X-Archives-Hash: 6da76a16b2f1d0aff4c26dfa390f50d6 --nextPart80148193.qI7GcQnruz Content-Type: Text/Plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable On Friday 18 Sep 2015 19:15:50 Rich Freeman wrote: > On Fri, Sep 18, 2015 at 1:56 PM, Mick wrote: > > On Friday 18 Sep 2015 17:16:54 Marc Joliet wrote: > >> On Friday 18 September 2015 10:31:01 Mick wrote: > >> >A couple of months ago the akonadi DB went sideways and kmail played = up > >> >as a result. Again I was suspicious of btrfs, but neither the logs > >> >nor fsck showed up anything. > >>=20 > >> I take it "btrfs scrub" didn't turn up anything, or is that what you > >> meant by fsck? > >=20 > > Am I supposed to run scrub with I do not have a RAID running? I thought > > scrub was meant for comparing checksums between mirrored fs - have I got > > this wrong? >=20 > You can actually run scrub on a non-raid btrfs setup. Btrfs will > report any errors that it detects (using the checksumming in the > filesystem), but it would not be able to fix errors unless you have it > storing redundant data somewhere (even on non-raid it still stores > redundant metadata by default, and you can choose to do this with data > as well which protects against block-level failures but not disk-level > failures, obviously). >=20 > However, you'd have gotten the same errors in dmesg just trying to > read the files - btrfs checks the checksum on all file read > operations. That is a big part of the value of both btrfs and zfs. Ah! V interesting ... can I run scrub with mounted partitions, or do I hav= e=20 to do it from a LiveCD? =2D-=20 Regards, Mick --nextPart80148193.qI7GcQnruz Content-Type: application/pgp-signature; name=signature.asc Content-Description: This is a digitally signed message part. -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iQEcBAABCAAGBQJV/FXYAAoJELAdA+zwE4YeB14H/RErPfTG2ymENuW0IVMyYLGE MoJ1IDbWNx++oPGE9eK2aqwAQaMzx1LvPL/DHo+AetkafsRMR/uQHbvOW2QcOTSq Y5FJy0sQIY/475edzGYEzaZevFWa8C+cTQL6uDg9VyCL3l4u7s3M9DceiRTh6cOX BfizfkpC2sqnXsRBJTWVhGT9PE2wHaA19VZ7kty0v7hFd9JpPpr0gsYGuTEDW2et F7xm1/aCCUR5z5gzC8MoJwsXqjjyR9DGafmWa7p0iRiS4ZL32NtlFOWauRPOJ+z0 RCLlcW80MVx0F32NKpDFQmR/VQYYsmJ6WGVx/BFsXG37dFbiVXfp9XYdql8GAqg= =ULmB -----END PGP SIGNATURE----- --nextPart80148193.qI7GcQnruz--