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=-3.6 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, 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 E56B5C41604 for ; Tue, 6 Oct 2020 19:57:23 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A2AEB20760 for ; Tue, 6 Oct 2020 19:57:23 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="FEloznks" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727182AbgJFT5X (ORCPT ); Tue, 6 Oct 2020 15:57:23 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57992 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725943AbgJFT5W (ORCPT ); Tue, 6 Oct 2020 15:57:22 -0400 Received: from mail-pj1-x1029.google.com (mail-pj1-x1029.google.com [IPv6:2607:f8b0:4864:20::1029]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8DC7AC0613D2 for ; Tue, 6 Oct 2020 12:57:22 -0700 (PDT) Received: by mail-pj1-x1029.google.com with SMTP id i3so2128304pjz.4 for ; Tue, 06 Oct 2020 12:57:22 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=I0TlD0kJRp+U8+Y27vNDgURU9ps41ekIpSRVul74ZOs=; b=FEloznksgGy8eyzErrNjb9xsxn9FLy3jSO2HH7C8hgaHLe9Qd1RvhrWuIbTVnR1MjS hngZKJkMiQ0tEKxqE9WMlgE9QX3gle7T5r0M0oMW+kZkwqxZxAjX0ihN5fCJw2pQ8Koi bmuLZlckAsy8TET4rE8xF1WqlsScUWDlysnxCBHSI85v3X8+uwDi4fsUcJ36xxe+NqxJ vvfQthFGXHbsUn4oqHzVoMFaFg5RYzzy4q1/w0IZgNtpQqhLz0w0lHK8Jzw5wpLpPYSf NsiRr+ipvMZTjx9cOFT/be61B54UreCiBOaRm85oJFPPKxI0tgq+9U2+NG3WP67jLbqp tH3g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=I0TlD0kJRp+U8+Y27vNDgURU9ps41ekIpSRVul74ZOs=; b=S0N8z9PA0kOHZbQPPd2my++gBd1YffCPqUSxIv/2sRbNlzuKN2zCC8GW4xT0n/CIto 6i4qOXvb1RAAoQKAVxiAqHyMEvIenr7iyNbk3JoIU0cA8Tbyc0sKtjdXwfadNiyp/0Ib F2bAm+I/r5LEX3j5iWKNljXBCARiOtRL4oJlCiwazl/3ngfZI38dhmGgECjA8au/POlh Zhp5h65MWH4Y1PtrFNrgVHzUR2y9dlVNUNOAx1wPqlse1/ebNAqWdfSfb9ec6XEhHJih QRgX504hfcw/Wm7ITr3CAZvB5W43C5jPTNXujpu5Fqd7I0DRg7XIjIvzLK7x/kRQHg9n rtCQ== X-Gm-Message-State: AOAM530czN6tIDp9P31FRVq3qhkLZtyIz+4+vrZ63wRs/OR6NbSL+Crh CmgTQxEcp9hnIjT8Sv6LZMTegagZeiwwCdxsJHPloBSb X-Google-Smtp-Source: ABdhPJzE9EchYEG91qiAdNXrcMqFCOJAK2HzMHlrgqRVjooHf7I93Aybjony4juD4fQVBjDIXB6uRLgEm0Sfu1d1d9w= X-Received: by 2002:a17:902:bd8e:b029:d2:ad1a:f477 with SMTP id q14-20020a170902bd8eb02900d2ad1af477mr4669068pls.40.1602014241514; Tue, 06 Oct 2020 12:57:21 -0700 (PDT) MIME-Version: 1.0 References: In-Reply-To: From: Mark Wagner Date: Tue, 6 Oct 2020 12:57:10 -0700 Message-ID: Subject: Re: Need Help with Corrupted RAID6 Array To: Linux RAID Mailing List Cc: Kenneth Emerson Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-raid@vger.kernel.org On Tue, Oct 6, 2020 at 4:06 AM Kenneth Emerson wrote: > > It's been several years since I asked and received help on this list. > Once again, I find myself in a bind. I have accidentally destroyed > one of my disks in a set of 5 4-TB drives set as RAID6. When I > rebooted 2 of the three arrays rebuilt correctly; however, the third > (largest and most important) would not assemble. I thought, even > though I had lost one drive, I could rebuild the array by substituting > a new, partitioned drive but I cannot get the array to start. > root@MythTV:/home/ken# mdadm --examine /dev/sdb4 > /dev/sdb4: > Raid Level : raid6 > Raid Devices : 7 > Array Size : 13165485120 (12555.59 GiB 13481.46 GB) > Used Dev Size : 5266194048 (2511.12 GiB 2696.29 GB) > Array State : AAAAAAA ('A' == active, '.' == missing, 'R' == replacing) You say this is a five-disk RAID-6 array, but the disk metadata says, in three different ways, that this is a seven-disk array. Do you have any idea what could be causing this discrepancy? -- Mark