From owner-freebsd-questions@FreeBSD.ORG Mon Sep 7 10:41:08 2009 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 0BD361065670 for ; Mon, 7 Sep 2009 10:41:08 +0000 (UTC) (envelope-from stark@mapper.nl) Received: from smtp-out0.tiscali.nl (smtp-out0.tiscali.nl [195.241.79.175]) by mx1.freebsd.org (Postfix) with ESMTP id BD0378FC17 for ; Mon, 7 Sep 2009 10:41:07 +0000 (UTC) Received: from [82.170.17.27] (helo=mapper.nl) by smtp-out0.tiscali.nl with esmtp (Exim) (envelope-from ) id 1Mkbek-0000KU-Eh; Mon, 07 Sep 2009 12:41:06 +0200 Received: from bowser ([192.168.0.1] helo=[0.0.0.0]) by mapper.nl with esmtp (Exim 4.69 (FreeBSD)) (envelope-from ) id 1Mkah2-0007cp-Gy; Mon, 07 Sep 2009 11:39:24 +0200 Message-ID: <4AA4D4C9.3050707@mapper.nl> Date: Mon, 07 Sep 2009 11:39:21 +0200 From: Mark Stapper User-Agent: Thunderbird 2.0.0.23 (Windows/20090812) MIME-Version: 1.0 To: Daniel Eriksson References: <4A9B731E.9050400@mapper.nl> <4A9CBDBB.3060403@mapper.nl> <4F9C9299A10AE74E89EA580D14AA10A635E9C3@royal64.emp.zapto.org> <4A9F8F96.3090806@mapper.nl> <4F9C9299A10AE74E89EA580D14AA10A635E9C8@royal64.emp.zapto.org> In-Reply-To: <4F9C9299A10AE74E89EA580D14AA10A635E9C8@royal64.emp.zapto.org> X-Enigmail-Version: 0.96.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="------------enig0EB84AD1B4167D94962A5224" Cc: freebsd-questions@freebsd.org Subject: Re: ZFS and DMA read error X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 07 Sep 2009 10:41:08 -0000 This is an OpenPGP/MIME signed message (RFC 2440 and 3156) --------------enig0EB84AD1B4167D94962A5224 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Daniel Eriksson wrote: > Mark Stapper wrote: > > =20 >> Yeah, i did the long SMART selftest three times now, each of which it >> failed on the same LBA address. >> =20 > > I assume 'smartctl -a /dev/adX' reports that the read test failed at LB= A > XXX something? > =20 Indeed it does. Always with the same LBA code/sector/address or whichever= =2E > =20 >> Why would I want to clear my driver before I run these tests? >> =20 > > In this case it's not really clearing the drive you are aiming for, it > is to write to every sector. If you have a failed sector (which you do)= , > writing to it will force the drive firmware to remap the sector. As far= > as I know, most drives will not remap an unreadable sector until it is > written to. > =20 So I see. Could this be why I haven't had any read errors anymore? (After the zpool scrub that is) > /Daniel Eriksson > =20 --------------enig0EB84AD1B4167D94962A5224 Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.9 (MingW32) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iEYEARECAAYFAkqk1MwACgkQN9xNqOOVnWAL3ACgjOp533CzWDX6JEN4jlc+zegf xIMAn2TvwObkK5ohE3H2VfhJmzwqN5O0 =n8a0 -----END PGP SIGNATURE----- --------------enig0EB84AD1B4167D94962A5224--