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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7895AC433F5 for ; Mon, 31 Jan 2022 19:22:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1359480AbiAaTWH (ORCPT ); Mon, 31 Jan 2022 14:22:07 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48430 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235454AbiAaTWG (ORCPT ); Mon, 31 Jan 2022 14:22:06 -0500 Received: from hermes.turmel.org (hermes.turmel.org [IPv6:2604:180:f1::1e9]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id CDF48C061714 for ; Mon, 31 Jan 2022 11:22:06 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=turmel.org; s=a; h=Content-Transfer-Encoding:Content-Type:In-Reply-To:From:References:Cc :To:Subject:MIME-Version:Date:Message-ID:Sender:Reply-To:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Id:List-Help:List-Unsubscribe:List-Subscribe: List-Post:List-Owner:List-Archive; bh=msih4aEGZG/IIrA1tnhj8mNJCpFiqefzMe+pzcK59OM=; b=gEu0HQNSYt47WtmVJmZpnKDsJb +kqa+Lu7tpq/4WhpiDQib9lb3sdGNRrBQteJeRZ4b3XD1MXK0F3bgVULrJ1cbx+oAr6zOkyLDSxwg mLuyS/X4XW68awoo4nSKuChFzW5bQlNyDCPEpaMpMGbYtJYYRusnNYrkxl1XLPqxAWz3rVe2LMTSc 7xHAUjbHpgnfkO83K+dsosdqKk2GQkkA9q17+zJGlA/Jlag+TopGxxIaH7fNAHSZ/J7bQdA7kjTC2 Rps2Uhz9vV9bxKlRS6OorrSxhEGIDu1AW0erIX7KGRtcA6qRXO9njo0osWImNo6Fsx27Pjv0cjBKV AidzEV2Q==; Received: from c-98-192-104-236.hsd1.ga.comcast.net ([98.192.104.236] helo=[192.168.19.160]) by hermes.turmel.org with esmtpsa (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1nEcFQ-0008JI-FP; Mon, 31 Jan 2022 19:21:56 +0000 Message-ID: <698869e2-b45c-a355-f58b-d7b1b4f7830d@turmel.org> Date: Mon, 31 Jan 2022 14:21:54 -0500 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.5.0 Subject: Re: hardware recovery and RAID5 services Content-Language: en-US To: Geoff Back , Roger Heflin , Nix Cc: Wols Lists , David T-G , Linux RAID References: <20220121164804.GE14596@justpickone.org> <6cfb92e5-5845-37ff-d237-4c3d663446e3@youngman.org.uk> <33fb3dfd-e234-14d9-7643-3449c700a241@youngman.org.uk> <7571b432-4b19-3de4-b04d-3a46b09b0629@turmel.org> <87leyvvrqp.fsf@esperi.org.uk> From: Phil Turmel In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-raid@vger.kernel.org On 1/31/22 14:07, Geoff Back wrote: > > If a disk has one or more bad sectors, surely the only logical action is > to schedule it for replacement as soon as a new one can be obtained; and > if it's still in warranty, send it back.  If the data is valuable enough > to warrant use of RAID (along with, presumably, appropriate backups) > surely it is too valuable to risk continuing to use a known faulty disk? > > In which case, I would suggest that dangerous experiments that try to > force the disk to reallocate the block are arguably pointless. > > Just my opinion, but one that has served me well so far. > > Regards, > > Geoff. I would be surprised if you got warranty replacement just for a few re-allocated sectors. The sheer quantity of sectors in modern drives and the tiny magnetic domains involved means **no** drive is error-free. Just most defects are identified and mapped out before shipping. Reallocations cover the marginal cases. I replace drives when re-allocations hit double digits, though I've had to run a few corners cases well past that point. Phil