From owner-freebsd-questions@freebsd.org Thu Mar 26 09:49:39 2020 Return-Path: Delivered-To: freebsd-questions@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id DE95327A327 for ; Thu, 26 Mar 2020 09:49:39 +0000 (UTC) (envelope-from 4250.82.1d4c100004ccc53.f73a93e1012faf0a6a12c8d639815d53@email-od.com) Received: from s1-b0c6.socketlabs.email-od.com (s1-b0c6.socketlabs.email-od.com [142.0.176.198]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 48p0ZL2RShz4BJm for ; Thu, 26 Mar 2020 09:49:29 +0000 (UTC) (envelope-from 4250.82.1d4c100004ccc53.f73a93e1012faf0a6a12c8d639815d53@email-od.com) DKIM-Signature: v=1; a=rsa-sha256; d=email-od.com;i=@email-od.com;s=dkim; c=relaxed/relaxed; q=dns/txt; t=1585216170; x=1587808170; h=content-transfer-encoding:content-type:mime-version:references:in-reply-to:message-id:subject:to:from:date:x-thread-info; bh=dUvLgBmL5S3ay3VZnmAB4EUXEnbCsxxim22Vfbgp7kM=; b=A9p5jvbGOo9HeJ0IJOUuXMJF43NIIqZuS8KfqY5dES5hX0N4VUtv6mUIXqxhjlDxscxDrT0Jh5nkJ3e5IT0kp7boMkXZt7AVhk8L000yKghQh3nFqA3jO8DwQN15IioX2shw/w/SuBdxe9Vykr84qDcRxbvz0TNy1LKHqD+qjcI= X-Thread-Info: NDI1MC45Mi4xZDRjMTAwMDA0Y2NjNTMuZnJlZWJzZC1xdWVzdGlvbnM9ZnJlZWJzZC5vcmc= Received: from r3.sg.in.socketlabs.com (r3.sg.in.socketlabs.com [142.0.179.13]) by mxsg2.email-od.com with ESMTP; Thu, 26 Mar 2020 05:49:13 -0400 Received: from smtp.lan.sohara.org (EMTPY [185.202.17.215]) by r3.sg.in.socketlabs.com with ESMTP(version=Tls12 cipher=Aes256 bits=256); Thu, 26 Mar 2020 05:49:13 -0400 Received: from [192.168.63.1] (helo=steve.lan.sohara.org) by smtp.lan.sohara.org with smtp (Exim 4.92.3 (FreeBSD)) (envelope-from ) id 1jHP8S-0005DC-07 for freebsd-questions@freebsd.org; Thu, 26 Mar 2020 09:49:12 +0000 Date: Thu, 26 Mar 2020 09:49:11 +0000 From: Steve O'Hara-Smith To: freebsd-questions@freebsd.org Subject: Re: drive selection for disk arrays Message-Id: <20200326094911.632d3df6e1396fa565126177@sohara.org> In-Reply-To: <713db821-8f69-b41a-75b7-a412a0824c43@holgerdanske.com> References: <20200325081814.GK35528@mithril.foucry.net> <713db821-8f69-b41a-75b7-a412a0824c43@holgerdanske.com> X-Mailer: Sylpheed 3.7.0 (GTK+ 2.24.32; amd64-portbld-freebsd12.0) X-Clacks-Overhead: "GNU Terry Pratchett" Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Rspamd-Queue-Id: 48p0ZL2RShz4BJm X-Spamd-Bar: - Authentication-Results: mx1.freebsd.org; dkim=pass header.d=email-od.com header.s=dkim header.b=A9p5jvbG; dmarc=none; spf=pass (mx1.freebsd.org: domain of 4250.82.1d4c100004ccc53.f73a93e1012faf0a6a12c8d639815d53@email-od.com designates 142.0.176.198 as permitted sender) smtp.mailfrom=4250.82.1d4c100004ccc53.f73a93e1012faf0a6a12c8d639815d53@email-od.com X-Spamd-Result: default: False [-1.33 / 15.00]; ARC_NA(0.00)[]; NEURAL_HAM_MEDIUM(-0.78)[-0.777,0]; R_DKIM_ALLOW(-0.20)[email-od.com:s=dkim]; FROM_HAS_DN(0.00)[]; R_SPF_ALLOW(-0.20)[+ip4:142.0.176.0/20]; TO_MATCH_ENVRCPT_ALL(0.00)[]; MIME_GOOD(-0.10)[text/plain]; TO_DN_NONE(0.00)[]; DMARC_NA(0.00)[sohara.org]; RCPT_COUNT_ONE(0.00)[1]; NEURAL_HAM_LONG(-0.95)[-0.947,0]; RCVD_COUNT_THREE(0.00)[4]; IP_SCORE(0.09)[ip: (-0.25), ipnet: 142.0.176.0/22(0.50), asn: 7381(0.25), country: US(-0.05)]; MV_CASE(0.50)[]; DKIM_TRACE(0.00)[email-od.com:+]; RCVD_IN_DNSWL_NONE(0.00)[198.176.0.142.list.dnswl.org : 127.0.15.0]; FORGED_SENDER(0.30)[steve@sohara.org,4250.82.1d4c100004ccc53.f73a93e1012faf0a6a12c8d639815d53@email-od.com]; MIME_TRACE(0.00)[0:+]; RCVD_TLS_LAST(0.00)[]; ASN(0.00)[asn:7381, ipnet:142.0.176.0/22, country:US]; FROM_NEQ_ENVFROM(0.00)[steve@sohara.org,4250.82.1d4c100004ccc53.f73a93e1012faf0a6a12c8d639815d53@email-od.com]; MID_RHS_MATCH_FROM(0.00)[] X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 26 Mar 2020 09:49:40 -0000 On Wed, 25 Mar 2020 15:19:35 -0700 David Christensen wrote: > Have anyone seen a failure involving multiple similar drives all failing > in the same mode at the same time? Not quite that, but I have seen a new array populated with new drives from the same batch have a drive fail and while the replacement was being populated another drive failed. Fortunately it was a new array undergoing testing before going into production so there was no data that mattered on it. For home use I go for second hand 3.5" enterprise grade SAS drives. They've usually been used in nearline backup servers and similar low load environments and are nicely run in past the front of the bathtub with most of the flat bit still to go. I've had less trouble with these than with any big name consumer drives and they cost a lot less. -- Steve O'Hara-Smith