From owner-freebsd-fs@freebsd.org Mon Jul 30 06:38:26 2018 Return-Path: Delivered-To: freebsd-fs@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id EC975104C187 for ; Mon, 30 Jul 2018 06:38:25 +0000 (UTC) (envelope-from peter@rulingia.com) Received: from vtr.rulingia.com (vtr.rulingia.com [IPv6:2001:19f0:5801:ebe:5400:1ff:fe53:30fd]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "vtr.rulingia.com", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 2E3D08A8B1 for ; Mon, 30 Jul 2018 06:38:24 +0000 (UTC) (envelope-from peter@rulingia.com) Received: from server.rulingia.com (ppp59-167-167-3.static.internode.on.net [59.167.167.3]) by vtr.rulingia.com (8.15.2/8.15.2) with ESMTPS id w6U6cDro032634 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Mon, 30 Jul 2018 16:38:19 +1000 (AEST) (envelope-from peter@rulingia.com) X-Bogosity: Ham, spamicity=0.000000 Received: from server.rulingia.com (localhost.rulingia.com [127.0.0.1]) by server.rulingia.com (8.15.2/8.15.2) with ESMTPS id w6U6c5rX061721 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO); Mon, 30 Jul 2018 16:38:07 +1000 (AEST) (envelope-from peter@server.rulingia.com) Received: (from peter@localhost) by server.rulingia.com (8.15.2/8.15.2/Submit) id w6U6c5No061720; Mon, 30 Jul 2018 16:38:05 +1000 (AEST) (envelope-from peter) Date: Mon, 30 Jul 2018 16:38:04 +1000 From: Peter Jeremy To: Robert Clausecker Cc: freebsd-fs@freebsd.org Subject: Re: badsect(8) is gone -- what now? Message-ID: <20180730063804.GA4409@server.rulingia.com> References: <20180727130743.GB45967@fuz.su> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="bg08WKrSYDhXBjb5" Content-Disposition: inline In-Reply-To: <20180727130743.GB45967@fuz.su> X-PGP-Key: http://www.rulingia.com/keys/peter.pgp User-Agent: Mutt/1.10.0 (2018-05-17) X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.27 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 30 Jul 2018 06:38:26 -0000 --bg08WKrSYDhXBjb5 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On 2018-Jul-27 15:07:43 +0200, Robert Clausecker wrote: >Is there any way the kernel interface for badsect(8) or a utilitiy >fulfilling a similar purpose is going to come back? I understand that >kernel support was removed due to possible misuse of mknod(S_IFMT) >leading to crashes [1], but there really ought to be some way to mark a >sector as bad if the disk doesn't want to do it for you. All modern disks do bad sector mapping in the drive firmware. In general, if you disk reaches a point where it can't remap a visibly bad sector then the drive's internal set of spare blocks is exhausted and the disk is about to fail completely. The recommended solution is to replace the disk. Have you looked at the disk's SMART stats (using eg ports/sysutils/smartmontools= )? One approach I've used in the past is to create a file covering the bad sector(s), mark it immutable and stash it somewhere where you don't attempt to read it. --=20 Peter Jeremy --bg08WKrSYDhXBjb5 Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQKTBAEBCgB9FiEE7rKYbDBnHnTmXCJ+FqWXoOSiCzQFAltesktfFIAAAAAALgAo aXNzdWVyLWZwckBub3RhdGlvbnMub3BlbnBncC5maWZ0aGhvcnNlbWFuLm5ldEVF QjI5ODZDMzA2NzFFNzRFNjVDMjI3RTE2QTU5N0EwRTRBMjBCMzQACgkQFqWXoOSi CzTYbQ//SfJwmfYr02IWfe/ahTmy38QYH7RPlGh4y1g/CxhYVDxLotGdvRYuC8oF Ua+q2huRQEC23qc+aefvS+kA+Qi4TMBSohU0NjsFH0bEzaTGwvEA3s1j0pB+1nxb 3Kn+eyRxNks68ADXxo7HYeNw19fc7XU3hf8BA/vxHkLzbMFXVUyodJRtw59bpqJC 9qNz96Y00J16NBQFIt2jJvvqRRLuZD/Kp0jqahj3OG91TidJmgrTWrsuIq9TkqtB J+FGo9PVF1t4o/dHAnr93OotFNefcsRePX3bRlNyVBOSoVaAxID541UujiPcXSn3 N5IS66M5lf6nESdJCvS3mchlRhNWXIa7D8qyiRweJfyYGJRRG4g4DxQvNfPKjz90 WmaHNKnWtw+RW78W5YkdOJyfFu11lYJ2zlDtgE2txJEgAubVkkooAT8HPKYglWHb NLAQ0RpMifPYq2bq3UK+b6VZ7ngljWKymfiw5D5dd47M8lhiSbyuOAmxr5x4LL4m QMSPPABpKqJL8WGAe3GRqdlbVPJOB6BDjPi6DDS65UTEbbjJX5waDyaeGX/6ycfI W6SUtI3EgyFVLbLvcPg4ddICXPV5PLl3dlOd7f9VPr/jd1uBC+A/DvQmZ0FLhYOv xwFAchPTMfs+kQCBlq14JBZmvuK8XPT39KpsM5xZ8AhQwzKwiwM= =V4vp -----END PGP SIGNATURE----- --bg08WKrSYDhXBjb5--