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 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 6822CC433F5 for ; Sun, 8 May 2022 14:21:08 +0000 (UTC) Received: from mimecast-mx02.redhat.com (mx3-rdu2.redhat.com [66.187.233.73]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-595-lGzuawWXOA6QAqO6N0T0Qw-1; Sun, 08 May 2022 10:21:04 -0400 X-MC-Unique: lGzuawWXOA6QAqO6N0T0Qw-1 Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.rdu2.redhat.com [10.11.54.5]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id EC7163C10249; Sun, 8 May 2022 14:21:01 +0000 (UTC) Received: from mm-prod-listman-01.mail-001.prod.us-east-1.aws.redhat.com (unknown [10.30.29.100]) by smtp.corp.redhat.com (Postfix) with ESMTP id EB1679E60; Sun, 8 May 2022 14:20:56 +0000 (UTC) Received: from mm-prod-listman-01.mail-001.prod.us-east-1.aws.redhat.com (localhost [IPv6:::1]) by mm-prod-listman-01.mail-001.prod.us-east-1.aws.redhat.com (Postfix) with ESMTP id B1C8E194704E; Sun, 8 May 2022 14:20:56 +0000 (UTC) Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.rdu2.redhat.com [10.11.54.2]) by mm-prod-listman-01.mail-001.prod.us-east-1.aws.redhat.com (Postfix) with ESMTP id C0B901947041 for ; Sun, 8 May 2022 14:20:55 +0000 (UTC) Received: by smtp.corp.redhat.com (Postfix) id A348240D1B9A; Sun, 8 May 2022 14:20:55 +0000 (UTC) Received: from mimecast-mx02.redhat.com (mimecast07.extmail.prod.ext.rdu2.redhat.com [10.11.55.23]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 9F9B84010E2A for ; Sun, 8 May 2022 14:20:55 +0000 (UTC) Received: from us-smtp-1.mimecast.com (us-smtp-delivery-1.mimecast.com [207.211.31.120]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 834303C10248 for ; Sun, 8 May 2022 14:20:55 +0000 (UTC) Received: from mail.gathman.org (mail.gathman.org [70.184.247.44]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-81-UFkFRPkFPZaiPecj0tLsUg-1; Sun, 08 May 2022 10:20:53 -0400 X-MC-Unique: UFkFRPkFPZaiPecj0tLsUg-1 Received: from mail.gathman.org (mail.gathman.org [IPv6:2001:470:8:809::1010]) (authenticated bits=0) by mail.gathman.org (8.14.7/8.14.7) with ESMTP id 248DPsL7008325 (version=TLSv1/SSLv3 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO) for ; Sun, 8 May 2022 09:25:58 -0400 Date: Sun, 8 May 2022 09:25:54 -0400 (EDT) From: Stuart D Gathman To: LVM general discussion and development In-Reply-To: <4D4E1DC0-8A04-474C-8DB2-4C9429F092F2@icloud.com> Message-ID: <6910f1f-b08d-e0fc-4f4d-cbfda6ac7f57@gathman.org> References: <7534073B-7DBD-46B5-9CA5-BFB3C603C75E@icloud.com> <25199.10122.376547.499176@quad.stoffel.home> <324D8F25-90D3-4165-BE86-11B217DAFDE4@icloud.com> <25200.21283.981034.416787@quad.stoffel.home> <87561BC7-DDA5-4BC9-9F98-17118199E96D@icloud.com> <6d72d74a-98cc-b055-d1ba-bcd20201e67@gathman.org> <4D4E1DC0-8A04-474C-8DB2-4C9429F092F2@icloud.com> MIME-Version: 1.0 X-Mimecast-Impersonation-Protect: Policy=CLT - Impersonation Protection Definition; Similar Internal Domain=false; Similar Monitored External Domain=false; Custom External Domain=false; Mimecast External Domain=false; Newly Observed Domain=false; Internal User Name=false; Custom Display Name List=false; Reply-to Address Mismatch=false; Targeted Threat Dictionary=false; Mimecast Threat Dictionary=false; Custom Threat Dictionary=false X-Scanned-By: MIMEDefang 2.84 on 10.11.54.2 Subject: Re: [linux-lvm] Bypassing LVM Restrictions - RAID6 With Less Than 5 Disks X-BeenThere: linux-lvm@redhat.com X-Mailman-Version: 2.1.29 Precedence: list List-Id: LVM general discussion and development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: LVM general discussion and development Errors-To: linux-lvm-bounces@redhat.com Sender: "linux-lvm" X-Scanned-By: MIMEDefang 2.79 on 10.11.54.5 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=linux-lvm-bounces@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: multipart/mixed; boundary="-1203360521-598408498-1652016358=:8240" This message is in MIME format. The first part should be readable text, while the remaining parts are likely unreadable without MIME-aware tools. ---1203360521-598408498-1652016358=:8240 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: quoted-printable X-MIME-Autoconverted: from 8bit to quoted-printable by mail.gathman.org id 248DPsL7008325 On Sat, 7 May 2022, Alex Lieflander wrote: > I don=E2=80=99t trust the hardware I=E2=80=99m running on very much, but = it=E2=80=99s all I have to work with at the moment; it=E2=80=99s important = that the array is resilient to *any* (and multiple) single chunk corruption= s because such corruptions are likely to happen in the future. > > For the last several months I=E2=80=99ve periodically been seeing (DM-Int= egrity) checksum mismatch warnings at various locations on all of my disks.= I stopped using a few SATA ports that were explicitly throwing SATA errors= , but I suspect that the remaining connections are unpredictably (albeit in= frequently) corrupting data in ways that are more difficult to detect. Sounds like a *great* test bed for software data integrity tools. Don't throw that system away when you get a more reliable one! That sounds like a situation that btrfs with multiple copies could handle. Use a beefier checksum than the default crc-32 also. ---1203360521-598408498-1652016358=:8240 Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ linux-lvm mailing list linux-lvm@redhat.com https://listman.redhat.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/ ---1203360521-598408498-1652016358=:8240--