From owner-freebsd-questions@freebsd.org Tue Sep 15 23:10:45 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 3D4F43E3682 for ; Tue, 15 Sep 2020 23:10:45 +0000 (UTC) (envelope-from kudzu@tenebras.com) Received: from mail-lf1-x12f.google.com (mail-lf1-x12f.google.com [IPv6:2a00:1450:4864:20::12f]) (using TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (2048 bits) client-digest SHA256) (Client CN "smtp.gmail.com", Issuer "GTS CA 1O1" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4Brf901mQBz3YJS for ; Tue, 15 Sep 2020 23:10:43 +0000 (UTC) (envelope-from kudzu@tenebras.com) Received: by mail-lf1-x12f.google.com with SMTP id m5so4892163lfp.7 for ; Tue, 15 Sep 2020 16:10:43 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=tenebras-com.20150623.gappssmtp.com; s=20150623; h=mime-version:references:in-reply-to:from:date:message-id:subject:to; bh=ND3CCtm9lCmuyPlBj7ENmlcgkpfeTzjBsvDJITi+j2E=; b=Am1cTO56IrnJZ4VSiOyfjda061Ner23Spbck0CwDsu6IOxWHaQXGGpkYr16abOvjIT h91T7Det03FFYD20F53V4LDum/Mz+Zv8o+Jzg3cWRELtsZrByF4DcT/wBW2x6shiNS+k 9zkGnDgn08G/KhYjwPq2yNPOiJ3gJkqsSsJt0uah0vwYFY4L7MMKpdhD/Cq5aOJ7Ol2m V+6PhK11ApEwy5AjZN0wPO3Kn0HMpeUaEmNGrgMYPOq4AzAeuxf3bh2a5BODCwCK3dFi dPh/0kYVp90zJQXCPBUm2IziaOjTLq9gQazrfguNv2LdmRu5iVz5UbO/4PjevFUmZ9PM 4Y5g== 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; bh=ND3CCtm9lCmuyPlBj7ENmlcgkpfeTzjBsvDJITi+j2E=; b=jKmoDrdQsXArj4Hhmo5RzU9ohJmQNjx2+1craglrnBVNjao16Ui4CIkwWsKp4VKkF7 OMRnQhiUW1Log5PkmxRMyPl5zgn7ug3zJzyI+Y3NpfJvpYZD9dc+8l9zVzERVu4HguDa VQsdc1DLIX4JM36epu3KS2wZ34bRLnbUxRrQcPVcCrMRLRTPel7R+YsemaM5SPivuovn UtDJl9AEf849YBec2CVpNUYcucMu1AJVn5ToHKOo8HHTXJ7315DkQpQkfcTLhwSCft++ jmwF5qjbmOAfmuUWrQJORx97sntzNTTFbndSxatsGlYuqkhULuJso2lJSGJCb5F0OG6G GQ9w== X-Gm-Message-State: AOAM5311uyO/l6RnZjSJ1unQasAsUQIr4DcyjcS8+5GaKFRMzvePbmsw zeub1abI8fgs92h0wkWOabJnOsCIP7/foDFwAhRUrFol7erhZg== X-Google-Smtp-Source: ABdhPJzESXhbQBfaSKx9mpFGtJ5wJRuBx92tZC2OrvxtiYWm5D118LkiT5KkEZJ8+jzYkwNrxj5m8EKWg5wMjnwAom0= X-Received: by 2002:a19:6758:: with SMTP id e24mr7424998lfj.255.1600211441752; Tue, 15 Sep 2020 16:10:41 -0700 (PDT) MIME-Version: 1.0 References: <20200915231901.e767350415aad298732f72cc@sohara.org> In-Reply-To: <20200915231901.e767350415aad298732f72cc@sohara.org> From: Michael Sierchio Date: Tue, 15 Sep 2020 16:10:05 -0700 Message-ID: Subject: Re: partitioning server with 2 hard drives To: FreeBSD Questions X-Rspamd-Queue-Id: 4Brf901mQBz3YJS X-Spamd-Bar: - Authentication-Results: mx1.freebsd.org; dkim=pass header.d=tenebras-com.20150623.gappssmtp.com header.s=20150623 header.b=Am1cTO56; dmarc=none; spf=none (mx1.freebsd.org: domain of kudzu@tenebras.com has no SPF policy when checking 2a00:1450:4864:20::12f) smtp.mailfrom=kudzu@tenebras.com X-Spamd-Result: default: False [-1.31 / 15.00]; ARC_NA(0.00)[]; NEURAL_HAM_MEDIUM(-0.37)[-0.369]; R_DKIM_ALLOW(-0.20)[tenebras-com.20150623.gappssmtp.com:s=20150623]; FROM_HAS_DN(0.00)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; NEURAL_HAM_LONG(-0.58)[-0.578]; MIME_GOOD(-0.10)[multipart/alternative,text/plain]; PREVIOUSLY_DELIVERED(0.00)[freebsd-questions@freebsd.org]; DMARC_NA(0.00)[tenebras.com]; RCPT_COUNT_ONE(0.00)[1]; TO_DN_ALL(0.00)[]; DKIM_TRACE(0.00)[tenebras-com.20150623.gappssmtp.com:+]; NEURAL_HAM_SHORT(-0.07)[-0.067]; RCVD_IN_DNSWL_NONE(0.00)[2a00:1450:4864:20::12f:from]; R_SPF_NA(0.00)[no SPF record]; FROM_EQ_ENVFROM(0.00)[]; MIME_TRACE(0.00)[0:+,1:+,2:~]; ASN(0.00)[asn:15169, ipnet:2a00:1450::/32, country:US]; RCVD_TLS_ALL(0.00)[]; MAILMAN_DEST(0.00)[freebsd-questions]; RCVD_COUNT_TWO(0.00)[2] Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Content-Filtered-By: Mailman/MimeDel 2.1.33 X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.33 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 15 Sep 2020 23:10:45 -0000 On Tue, Sep 15, 2020 at 3:19 PM Steve O'Hara-Smith wrote= : > > > I would go for a ZFS mirror using the rest of the drives, set up > a weekly scrub and never worry about a drive failure again. > When, not if, a drive fails, will you find one with precisely the same geometry / capacity to replace the failed drive and remirror? Can you do so before the other drive fails (which might be statistically likely)? There are good online MMTDL, MTTF, MTBF numbers for various raid levels for ZFS. None would lead me to be so glib. --=20 "Well," Brahm=C4=81 said, "even after ten thousand explanations, a fool is = no wiser, but an intelligent person requires only two thousand five hundred." - The Mah=C4=81bh=C4=81rata