From mboxrd@z Thu Jan 1 00:00:00 1970 From: Roman Mamedov Subject: Re: md RAID1 passes I/O errors to the filesystem despite having alive mirrors? Date: Fri, 15 Mar 2013 12:02:57 +0600 Message-ID: <20130315120257.60735a6f@natsu> References: <20130315041054.79eb5dcc@natsu> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=PGP-SHA1; boundary="Sig_/fW8LXeICxypcB45LcC2smkt"; protocol="application/pgp-signature" Return-path: In-Reply-To: Sender: linux-raid-owner@vger.kernel.org To: Chris Murphy Cc: linux-raid@vger.kernel.org List-Id: linux-raid.ids --Sig_/fW8LXeICxypcB45LcC2smkt Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: quoted-printable On Thu, 14 Mar 2013 22:04:17 -0600 Chris Murphy wrote: > 2. sdg is encountering UNC read errors, probably bad sectors, why it's ne= w right? It's not new, in fact it is in a questionable condition, but that's not the issue I am looking for help with, in fact I am glad if me using this disk suddenly helps uncover/solve some bug in mdadm :) I doubt it receives too m= uch testing with regard to its behavior in such rare circumstances (encountering bad sectors on a member configured as write-mostly with btrfs on top of everything, etc). > 3. md3 might be getting the mirrored copy off sdf, I can't actually tell >=20 > [ 771.438945] btrfs: bdev /dev/md3 errs: wr 0, rd 9, flush 0, corrupt 0,= gen 0 >=20 > That line is btrfs reporting read errors from md3, not corruptions. >=20 > [ 771.439011] ata11: EH complete > [ 771.439035] btrfs no csum found for inode 31016 start 5668864 > [ 771.479594] btrfs csum failed ino 31016 off 5668864 csum 2731683453 pr= ivate 0 >=20 > What are your btrfs mount options? Are you using nodatasum or nodatacow? rw,noatime,nodiratime,compress=3Dlzo,ssd,discard,space_cache,inode_cache --=20 With respect, Roman --Sig_/fW8LXeICxypcB45LcC2smkt Content-Type: application/pgp-signature; name=signature.asc Content-Disposition: attachment; filename=signature.asc -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iEYEARECAAYFAlFCuZEACgkQTLKSvz+PZwg4tgCfYzwt5/5C0IYAPSqhJlP5Juzv Yj4AoIycUtlCkdNormtbs4LsTR6bFnaC =w7PP -----END PGP SIGNATURE----- --Sig_/fW8LXeICxypcB45LcC2smkt--