From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-4.1 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 41928C433E7 for ; Wed, 2 Sep 2020 15:32:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 1AA2720767 for ; Wed, 2 Sep 2020 15:32:15 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=karlsbakk.net header.i=@karlsbakk.net header.b="DLag6/4k" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727968AbgIBP3F (ORCPT ); Wed, 2 Sep 2020 11:29:05 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49264 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726938AbgIBPZQ (ORCPT ); Wed, 2 Sep 2020 11:25:16 -0400 Received: from zimbra.karlsbakk.net (zimbra.karlsbakk.net [IPv6:2a0a:51c0:0:1f:4ca5::2]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 95B84C061246 for ; Wed, 2 Sep 2020 08:25:15 -0700 (PDT) Received: from localhost (localhost.localdomain [IPv6:::1]) by zimbra.karlsbakk.net (Postfix) with ESMTP id 2BCB43C273F; Wed, 2 Sep 2020 17:25:14 +0200 (CEST) Received: from zimbra.karlsbakk.net ([IPv6:::1]) by localhost (zimbra.karlsbakk.net [IPv6:::1]) (amavisd-new, port 10032) with ESMTP id 6dhbL2ONNbyR; Wed, 2 Sep 2020 17:25:12 +0200 (CEST) Received: from localhost (localhost.localdomain [IPv6:::1]) by zimbra.karlsbakk.net (Postfix) with ESMTP id EDD0E3C27C6; Wed, 2 Sep 2020 17:25:11 +0200 (CEST) DKIM-Filter: OpenDKIM Filter v2.10.3 zimbra.karlsbakk.net EDD0E3C27C6 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=karlsbakk.net; s=1DC131FE-D37A-11E7-BD32-3AD4DFE620DF; t=1599060312; bh=cDI8ivktQG22LirbXAZPU2J9xWu9Ihjgyqr57Bq8y0k=; h=Date:From:To:Message-ID:MIME-Version; b=DLag6/4kJfUd4TkTtPf0W9Sl2PxpN1xmnXjD3oxeYkUdBiFehXoH+20wwN8o85zig ZJKtLxlkGkKxtKNKvh6TqKsFDtMoqivOT+w7o7tjwlXXzcfI29xkqkTgiB8z7oHglY PD4ndX/c17xOtn2LHpOppeggFniYWLjCPQYZLNblb/j1BHyS33ubrXPHYKynbkh1Xj RdpsvG3+HGGzxtVHB3keumCkyaQN6aWS74qOBxc+ncCgCMr3Yu1g93boLstqGsOkXZ uRh1yK2gVCELwCnV8yJWaChncD+ClZi+5cca2K2QkVayIvP/JZC7/J4LL0q6KGTONm l0WogqOSTnYig== X-Virus-Scanned: amavisd-new at zimbra.karlsbakk.net Received: from zimbra.karlsbakk.net ([IPv6:::1]) by localhost (zimbra.karlsbakk.net [IPv6:::1]) (amavisd-new, port 10026) with ESMTP id 0V2G_KqtoaAA; Wed, 2 Sep 2020 17:25:11 +0200 (CEST) Received: from zimbra.karlsbakk.net (localhost.localdomain [127.0.0.1]) by zimbra.karlsbakk.net (Postfix) with ESMTP id CBA0F3C273F; Wed, 2 Sep 2020 17:25:11 +0200 (CEST) Date: Wed, 2 Sep 2020 17:25:11 +0200 (CEST) From: Roy Sigurd Karlsbakk To: Adam Goryachev Cc: "David C. Rankin" , Linux Raid Message-ID: <675330127.983718.1599060311646.JavaMail.zimbra@karlsbakk.net> In-Reply-To: References: <75076966.1748398.1597773608869.JavaMail.zimbra@karlsbakk.net> <001c5a42-93fd-eddb-ba86-aa3e2695f2a8@thehawken.org> <37b43194-f372-dd04-a319-34406f63c5a2@suddenlinkmail.com> <51057261.933837.1599053769942.JavaMail.zimbra@karlsbakk.net> <8dce17fb-13df-b273-cc3d-b3f71d180354@websitemanagers.com.au> <1375662956.965590.1599058237477.JavaMail.zimbra@karlsbakk.net> Subject: Re: Feature request: Remove the badblocks list MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable X-Originating-IP: [2a01:79c:cebf:61e4:95bb:fcf8:43db:53b] X-Mailer: Zimbra 8.8.10_GA_3801 (ZimbraWebClient - FF80 (Mac)/8.8.10_GA_3786) Thread-Topic: Feature request: Remove the badblocks list Thread-Index: NYMdcxlI6QbyNTGCWs09onBoM94fCA== Sender: linux-raid-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-raid@vger.kernel.org >> I'd better want md to stop fixing "somebody else's problem", that is, th= e disk, >> and rather just do its job. As for the case, I have tried to manually re= ad >> those sectors named in the badblocks list and they all work. All of them= . But >> then, there's no fixing, since they are proclaimed dead. So are their si= blings' >> sectors with the same number, regardless of status. > Just because you can read them, doesn't mean you can write them. > Clearly, at some point in time, one of your drives failed. You now need > to recover from that failed drive in the most sensible way. >> If a drive has multiple issues with bad sector, kick it out. It doesn't = have >> anything to do in the RAID anymore >=20 > And if a group of 100 sectors are bad on drive 1, and 100 different > sectors on drive 2, you want to kick both drives out, and destroy all > your data until you can create a new array and restore from backup? >=20 > OR, just mark those parts of all disks faulty, and at some point in the > future, you replace the disks, and then find a way to tell MD that the > sectors are working now (and preferably, re-test them before marking > them as OK)? >=20 > BTW, I just found this: >=20 > https://raid.wiki.kernel.org/index.php/The_Badblocks_controversy I linked to that earlier in the thread > Which suggests that there is indeed a bug which should be hunted and > fixed, and that actually the BBL isn't populated via failed writes, it > is populated by failed reads while doing a replace/add, AND the failed > read is from the source drive AND the parity/mirror drives. It is neither hunted down nor fixed. It's the same thing and it has stayed = the same for these years. > Either way, perhaps what is needed (if you are interested) is a > repeatable test scenario causing the problem, which could then be used > to identify and fix the bug. I have tried several things and all show the same. I just don't know how to= tell md "this drive's sector X is bad, so flag it so". Again, this is not the way to walk around a problem. What this does is just= hiding real problems and let them grow in generations instead of just flag= ging a bad drive as bad, since that's the originating problem here. Vennlig hilsen roy --=20 Roy Sigurd Karlsbakk (+47) 98013356 http://blogg.karlsbakk.net/ GPG Public key: http://karlsbakk.net/roysigurdkarlsbakk.pubkey.txt -- Hi=C3=B0 g=C3=B3=C3=B0a skaltu =C3=AD stein h=C3=B6ggva, hi=C3=B0 illa =C3= =AD snj=C3=B3 rita.