From owner-freebsd-stable@freebsd.org Wed May 1 16:16:18 2019 Return-Path: Delivered-To: freebsd-stable@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id C28ED159AD78 for ; Wed, 1 May 2019 16:16:18 +0000 (UTC) (envelope-from chrcoluk@gmail.com) Received: from mail-wr1-x431.google.com (mail-wr1-x431.google.com [IPv6:2a00:1450:4864:20::431]) (using TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits) server-signature RSA-PSS (4096 bits) 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 4548883E95 for ; Wed, 1 May 2019 16:16:17 +0000 (UTC) (envelope-from chrcoluk@gmail.com) Received: by mail-wr1-x431.google.com with SMTP id l2so9475378wrb.9 for ; Wed, 01 May 2019 09:16:17 -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=20TjVBDZVykQib9kia6+b1RIkj1ggvLaCI1r7fu0MqA=; b=TMHNz9J4mPRLjh4QXjeMy6i+djDZG7lTtEiSpGGcoXzh0AgvBIEXTDtzWuySYNR7S/ Oom29Q8ROXb6q7od7lsPNA1jS3Sma4jE9OW+6G7ef5KvaysBNSx2CRqMCSzLNh6s+YqJ 2h68HZC42Ko2KPqBH7fNYkn64wpl9xp13uVz2RPTxtPhaUQ+uLxsnqmUWuDSGYAFi5c5 G0Wk45zyngOQvxL1SGLMwE2iKjcc7MhdyublDaPzEXm27A8jioHfpiAeQMQWAsFgTIoH gti94HKIe4Pk5hiCuuP1NmYsUF0GjotzAduM7BrmFV29WzoFkEq9RTv4OFw/N3YpP91F O9ww== 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=20TjVBDZVykQib9kia6+b1RIkj1ggvLaCI1r7fu0MqA=; b=lwlW1Z2FRxmKXgsAjlWxeZJAN6qen4KFRpzjcBmAOv9Wy6WJdUpXO5n24/cbSAOfl/ m6mZEGg5QmYBuFPaveULH62yMpSH89U4dBd+NX60zNDdqdksHiRXMQu4XCE1InrTlpTS z3CIyjZYa08U7iIBO6h5ckHs6rzvP0MOwmv5C+pzMph45W6lOyILMJhniC93H1k4FEgj JdLv8SXiSSjFlt1SlFZd5F54XAsGuqTmGnevRIB0Vw3mcLoqJfJUzthnsplfHyTSIfVK QEGzmaRhLj1SCQOjEOXOMXZ8ahdjUe8n6Jq1XvEKE1pHl80hc65yL07wnVPToH1o/JwS DwCg== X-Gm-Message-State: APjAAAVOfR3+99EJHWVpHw8fNPCBM8akrkp4aCHAz2hXAQaS/fy8lWyq fVqpD7g/Iipwc9uEbc5PEqibyMTxSp2Zs5IVWfN9Ab2f X-Google-Smtp-Source: APXvYqzpF5SF1I28mIl9oFS4M7UtkV34Oxc5Fshj0VXHtZKOHYo61ygqGqEMEG91/0iFjvuTkHwm64A93wNvVmWLQ5U= X-Received: by 2002:adf:f70a:: with SMTP id r10mr32478710wrp.96.1556727375625; Wed, 01 May 2019 09:16:15 -0700 (PDT) MIME-Version: 1.0 References: <30506b3d-64fb-b327-94ae-d9da522f3a48@sorbs.net> In-Reply-To: <30506b3d-64fb-b327-94ae-d9da522f3a48@sorbs.net> From: Chris Date: Wed, 1 May 2019 16:16:04 +0000 Message-ID: Subject: Re: ZFS... To: Michelle Sullivan Cc: freebsd-stable Content-Type: text/plain; charset="UTF-8" X-Rspamd-Queue-Id: 4548883E95 X-Spamd-Bar: ------ Authentication-Results: mx1.freebsd.org; dkim=pass header.d=gmail.com header.s=20161025 header.b=TMHNz9J4; dmarc=pass (policy=none) header.from=gmail.com; spf=pass (mx1.freebsd.org: domain of chrcoluk@gmail.com designates 2a00:1450:4864:20::431 as permitted sender) smtp.mailfrom=chrcoluk@gmail.com X-Spamd-Result: default: False [-6.30 / 15.00]; R_SPF_ALLOW(-0.20)[+ip6:2a00:1450:4000::/36]; FREEMAIL_FROM(0.00)[gmail.com]; TO_DN_ALL(0.00)[]; DKIM_TRACE(0.00)[gmail.com:+]; MX_GOOD(-0.01)[cached: alt3.gmail-smtp-in.l.google.com]; RCPT_COUNT_TWO(0.00)[2]; SUBJ_ALL_CAPS(0.45)[6]; DMARC_POLICY_ALLOW(-0.50)[gmail.com,none]; NEURAL_HAM_SHORT(-0.97)[-0.970,0]; FROM_EQ_ENVFROM(0.00)[]; RCVD_TLS_LAST(0.00)[]; MIME_TRACE(0.00)[0:+]; FREEMAIL_ENVFROM(0.00)[gmail.com]; ASN(0.00)[asn:15169, ipnet:2a00:1450::/32, country:US]; DWL_DNSWL_NONE(0.00)[gmail.com.dwl.dnswl.org : 127.0.5.0]; ARC_NA(0.00)[]; NEURAL_HAM_MEDIUM(-1.00)[-1.000,0]; R_DKIM_ALLOW(-0.20)[gmail.com:s=20161025]; FROM_HAS_DN(0.00)[]; NEURAL_HAM_LONG(-1.00)[-1.000,0]; MIME_GOOD(-0.10)[text/plain]; PREVIOUSLY_DELIVERED(0.00)[freebsd-stable@freebsd.org]; TO_MATCH_ENVRCPT_SOME(0.00)[]; RCVD_IN_DNSWL_NONE(0.00)[1.3.4.0.0.0.0.0.0.0.0.0.0.0.0.0.0.2.0.0.4.6.8.4.0.5.4.1.0.0.a.2.list.dnswl.org : 127.0.5.0]; IP_SCORE(-2.77)[ip: (-9.31), ipnet: 2a00:1450::/32(-2.25), asn: 15169(-2.24), country: US(-0.06)]; RCVD_COUNT_TWO(0.00)[2] X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 01 May 2019 16:16:19 -0000 Your story is so unusual I am wondering if its not fiction, I mean all sorts of power cuts where it just so happens the UPS fails every time, then you decide to ship a server halfway round the world, and on top of that you get a way above average rate of hard drive failures. But aside from all this you managed to recover multiple times. ZFS is never claimed to be a get out of jail free card, but it did survive in your case multiple times, I suggest tho if you value redundancy, do not use RAIDZ but use Mirror instead. I dont know why people keep persisting with raid 5/6 now days with drives as large as they are. I have used ZFS since the days of FreeBSD 8.x and its resilience compared to the likes of ext is astounding and especially compared to UFS. Before marking it down think how would UFS or ext have managed the scenarios you presented in your blog. Also think about where you hosting your data with all your power failures and the UPS equipment you utilise as well. On Mon, 29 Apr 2019 at 16:26, Michelle Sullivan wrote: > > I know I'm not going to be popular for this, but I'll just drop it here > anyhow. > > http://www.michellesullivan.org/blog/1726 > > Perhaps one should reconsider either: > > 1. Looking at tools that may be able to recover corrupt ZFS metadata, or > 2. Defaulting to non ZFS filesystems on install. > > -- > Michelle Sullivan > http://www.mhix.org/ > > _______________________________________________ > freebsd-stable@freebsd.org mailing list > https://lists.freebsd.org/mailman/listinfo/freebsd-stable > To unsubscribe, send any mail to "freebsd-stable-unsubscribe@freebsd.org"